Another indication if the main jets are correct is how the car drives. link to Will Brake Fluid Remove Paint? Bilge Pump, Tires, Rims, & Hub Then the engine should be allowed to run in idling mode. 6 What voltage should a fuel pressure regulator have? Downs, Couplers, Mounts, Maintenance, Pumps and It's usually 1 to 3 PSI off from what the mechanical gauge reads. If the vehicle starts during this procedure, its a pretty clear sign the electric motor inside the pump is bad. Parts, Rule 1500 GPH Automatic Your not gonna get an accurate reading going by an electric sender on the rail. If the oil pump is bad, your only option is to replace it. This may be stuck open. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. These pipes pass underneath the car. Outboards, Shop However, a vehicles fuel system only needs modest adjustments. So, you want to know why the oil pressure is low at idle, allowing you to fix it quickly. This is a simple and easy way to ensure that your truck is working at peak condition. but everybody is saying that its fine? So, should they be able to get 43 psi by putting a tester on the fuel rail at idle or or they BSing me? This can get you out of so much trouble in the future. Rxmechanic.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for website owners to earn advertising fees by advertising and linking to Amazon.com. Fuel pressure questions, '05 duratec | Focus Fanatics Forum I have been working as a mechanic for over fifteen years. If your tailpipes are a light tan, you are probably in the ballpark. It will vary with temperature. Again, assuming no vacuum leaks. Need more info about the fuel pressure specs? Well, its usually a clogged fuel filter, which is super easy to replace. Carburetors are amazing mechanical devices. WebLow oil pressure at idle only, will most often mean that the engine is low on oil. If you notice that its too far down on the dipstick, its time to add more. The oil indicator can start to flash, showing that the pump has gone bad. Start the engine; the fuel pressure should remain the same. If fuel pressure is too high, your vehicles engine could be over fueled, leading to many of the symptoms listed below. Here are the 5.9 Cummins common rail fuel pressure specs: The average rail pressure at idle should be about 5,600-6,500 PSI. To adjust the fuel level, first shut the engine off, loosen the locking screw and adjust the large nut that raises and lowers the float on the top of the bowl. Protection, Dock Storage & 2023 Caniry - All Rights Reserved Hi There, I am R. Hasan Tito, a mechanic, and owner of this website. Cushions, Lexington Idling youll be at approximately 15 ~ 20 inches of vacuum which means fuel pressure must drop by 15 ~ 20 PSI to maintain the correct pressure drop across your injectors. Fittings and plugs. Stay up to date with the latest releases, events, promotions and more. www.georgelawsongallery.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. The cookie is used to store the user consent for the cookies in the category "Other. With the hose disconnected, the fuel system pressure should increase by 8 to 10 psi. If not, the problem could be something else on our list. Engine Pops At High Speeds:In this case, you notice that the engine sputters and gets back to normal when driving at high speeds or for long. To determine where the correct opening point is, you need to keep adjusting the screw out until you get a bog, then turn the screw in -turn. However, the pressure should not drop below 4.0 bar when in idling mode. My factory service manual states fuel pressure should be 50 psi with the engine running at idle. WebIf the fuel pressure exceeds 3.5 psi, install a fuel pressure regulator. Wrong. Codes for 2-7 are: P0202 or 07, P2149 or 46 Injector Positive Voltage Relay Control Circuit Group 2 or 1. Deals, Electronics Mechanical secondary carbs use a direct link to the secondary throttle shaft. If you feel that the fuel is pushing your finger hard,it meansyou have good pressure. QFT recommends an optimum fuel pressure of 6.5psi, (Maximum pressure of 7psi). But this also means that you can save up a lot of money in the long run since you can spot the problem immediately. As a result, this can lead to a rough running engine; poor fuel mileage, and black smoke coming from the exhaust. And vac is always in the 18-20 range. Common Rail Pressure Sensor. Inspect the following: Some vacuum leakage at the throttle shaft is normal. When this happens, your fuel pressure will drop. Fenders, Boat Trailer You should, therefore,take enough care of it by performingperiodic maintenance. Sockets, Marine Electrical Carburetor Installation & Tuning Segments. Yeah pressure drop is all I care about too and all I've logged for a long time. Wed say that they are heroes working in the shadows. These cookies will be stored in your browser only with your consent. What you are looking for is an increase or decrease in rpm. Something's not adding up there. Cable, Marine Batteries & If it feels lazy and non responsive to slight changes in the throttle, it may be too rich and will require jetting down. If the secondary side opens too quickly the engine will bog. Boarding, Paddles & You should get close to 20 PSI. This just means that the engine is getting too much fuel and little to no air. In this case, you needto check the pump itself. As it gets warmer it will drop. Covers, Boat Cover Furthermore, they usually come with different fittings, so you can use your fuel pressure gauge for many other applications. If they are black, your jetting is too rich. My fuel pressure gauge is under the hood so I cant see it when im driving. This happens when the fuel pump fails to supply a constant stream of fuel at a proper pressure for a long period. However, if engine rpm stays consistent or increases when you equalize the remaining screws, make another turn adjustment on the first screw and adjust the others to match. Typical highway driving is done on the main circuit of the carb where the air/fuel ratio is largely determined by the main jets. Oars, Wakeboard, Wakesurf & This can occur right after an oil change until the system falls back in line and registers the new viscosity. Home | About | Contact | Copyright | Privacy | Cookie Policy | Terms & Conditions | Sitemap. The fuel is then injected into the combustion chamber and for the process of combustion. We will also show you how to repair each of these problems. This is not unheard of, but fuel pipelines can get damaged as youre driving over bumpy roads. I do have a regulator when I adjust it all the way in or bottomed out I see no difference in pressure at the gauge at idle. Terminals, Marine Fuse Blocks & That is primarily determined by the amount of engine vacuum available at idle. You may be requiredto replace the fuel filter. Blocks, Marine And, the truck would be limping and running on 4 cylinders. In this guide, we will learn more about this problem and how to solve it. Started it up for the first time today with minor coolant leaks/etc. B. The rule of thumb is that the power valve rating (opening point) should be the manifold vacuum at idle, tested in the manner described above. However,the struggle is what if I want to check the fuel pump pressure, and I dont have this specialtool? You dont want to add an abundance of fresh oil to dirty oil, as this simply degrades what you are adding. We know this sounds tedious, but you could get a fuel pressure gauge, set it up, and always view the fuel pressure as youre going down the road. At 120K I replaced the fuel pump. Varnish, Marine Adhesives, JavaScript is disabled. If the vehicle is not under any load, you should get about 17-22 PSI and 32-35 at WOT. That sounds about right. Acessories, Fishing Outriggers & Kits, Boat Trailer PSI with key turned on and fuel pump engages: 43 PSI with key turned on and fuel pump shuts off: 40 steady with no drop off over time PSI with engine idling: 38 Does The fuel pump at idle is moving more fuel than the engine needs, the excess fuel is bypassed and repumped. Every car has a fuel pressure testing point, usually located nearthe car hoods fuel injectors. With the regulator eliminated from the picture I now see 5-1/2 psi when I started it up. for Sale, Buy A Check the values specs from the shop manual of the car. If you don't have a You need to know whats causing it if you want to fix it. Use the oil dipstick to monitor where it is currently at. Start the engine and turn one of the idle screws in or out. Boats, Propeller Parts & WebThe average rail pressure at idle should be about 5,600-6,500 PSI. After a long stretch of steady-state highway driving pull off in a rest area and check the tailpipes. Pressure somewhat shot up when throttle was momentarily applied but overall stayed around that 20 range. He has been working as a car mechanic for over 10 years, and the majority of them specialized in advanced car diagnostics and troubleshooting. If youre not quite sure if youre getting the correct fuel pressure, hook up one of those fuel pressure gauges to your car, and you should be good to go. However, it wouldnt hurt to diagnose it and rule this out. This means that the car is burning too much fuel than it should. We went to Zach Baker, a technician at QFT that spends much of his time talking customers through the correct tuning procedures, to give us his proven step-by-step carb tuning tips to get the most out of your carburetors performance. The fuel then travels from the fuel tank located on the cars backside to the fuel injection and makes it ready to be injected inside the engine. The first thing that comes to your mind when the car fails to start is a dead battery, bad spark plugs, or noInjectors Pulse. They are claiming that the only way to get an accutare fuel pressure reading it to take it to the lake and run it at WOT. FYI: Code P0174, system too lean, bank 2. While it might make sense, 100% of the cars I have worked on or seen drop about 9-10psi from base pressure when idling. You will see aplastic cap that covers the fuelpump. Insurance, Boat 1 What should fuel rail pressure be at idle? Accessories, Marine DC Power Plugs However, we suggest keeping track of your fuel pressure history. But if you let this problem go by, it could quickly go out of control. QFT equips its carbs with large sight glass windows right in the side of its fuel bowls, so it is easy to check the fuel/float level. & Dock, Anchor Chains & Spark plugs dont get a lot of credit. Anything I could be looking at or doing to correct this fuel pressure issue. Now I think I just need a fuel pressure gauge that I can see while driving. I will try and bypass the regulator all together. This cookie is set by GDPR Cookie Consent plugin. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[336,280],'georgelawsongallery_com-leader-4','ezslot_24',181,'0','0'])};__ez_fad_position('div-gpt-ad-georgelawsongallery_com-leader-4-0');Now start the truck and see what you get at idle. your boats Gel Coat Match, Shop Accessories, Marine Electrical The engine should be turned off while you are setting the adjustment on all of the screws. Re: What should fuel pressure be at idle? If the secondary throttle opens to soon, the engine is more likely to bog. However, this repair can have varying costs, depending on what type of vehicle you drive. Why are they so important? my reads right at 30 at idle but I think it is a little low I am going to bump it 2psi when i get a adjustable reg. i think that is to much. Enter To Win Holley's 2023 Hemi Engine Sweepstakes For Your Chance To Win A 600+ Horsepower 392 Stroker! With this issue, you might also notice the oil pressure dips during turns at higher speeds since the oil is moving from side to side, away from the sensors. Verify the fuel pressure is between 384-425 kPa (56-62 psi). This cookie is set by GDPR Cookie Consent plugin. The oil structure changes, thereby leading to a loss of pressure. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. The fuel pump usually has a check valve in the outlet to keep the line pressurized. Holley reds are supposed to be pre-set at the factory for 7 psi. This is the first sign of a bad fuel regulator. Some of these symptoms include your engine running rough, poor fuel economy and black smoke from the exhaust. I mean I did see 5-1/2 psi. This is really starting to irritate me since the boat is in the shop because it won't reach WOT. The pump sucks the fuel and rails it through the fuel filter to get rid of any particles and impurities. Professionals. Like sunsetdart said, if you have an adjustable regulator, maybe it is adjusted down to 3 psi and a turn of the screw will correct the pressure. Checked over the wiring and everything is correct and to a T. Im an electronic guy by trade so its kind of my thing. Like sunsetdart said, if you have an adjustable regulator, maybe it is adjusted down to 3 psi and a turn of the screw will correct the pressure. However, setting the vacuum secondary opening point requires trial and error road testing of the vehicle. Waxes, Boat Cleaning New Manley pistons/rings, bearings, arp hardware, Moroso oil pan, Arp head studs, Mac L/T's, SCT MAF sensor and a lot more. If you need a minor adjustment, be sure to shut the engine off and go through the adjustment procedure again. idk. When there is low pressure in the fuel pump,the pressure that the pump producecannotmake the fuel reach the injectorsfora complete combustion rectangle. Meters, Marine Electrical Panels Hardware, Boat Trailer that seams high to me. By clicking Accept All, you consent to the use of ALL the cookies. Come join the discussion about restoration, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more! This website uses cookies to improve your experience while you navigate through the website. If you have not changed the oil filter for a long time, it can actually be clogged with sludge and it will reduce the flow and lead to low oil pressure in the engine. at idle with the regulator hooked up i had 45psi. It is worth mentioning that the fuel pressure gauge should be installed on the outlet side of the regulator as close to the carburetor as possible. Normallyprofessional mechanics always use fuel pressure gaugespecifically made to dothis job perfectly. In addition to these no-load checks, drive the vehicle at various steady load conditions and Three 8 fuel lines can result in adequate (indicated) fuel pressures, but restricted fuel flow. If your check engine light is on and your car has been stalling out, you may have a fuel pump failure. If youre getting low fuel pressure, then thats your culprit. Parts, Inflatable Accessories, Boat Trailer Winches, Shop Anchor Box Anchors, Fishing Rod & Reel ADJUSTMENTS: 1. Press ESC to cancel. Racks, Fish Finders, Sounders In short, they can get around limitations to make your driving experience better. The Fora platform includes forum software by XenForo. Good point on unit conversions. and its at 35 psi WITH the vacuum line on. Understanding Holley Vacuum Secondary Carburetors, How To Choose A Regulator For Carbureted Vehicles. My in car auto meter gauge reads about 25 at idle but on the laptop with SCT software it's 12 psi more. These cookies ensure basic functionalities and security features of the website, anonymously. Having your vehicle stuck on the road or not starting up is a lousy experience. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Transom Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors. - Hot Rod www.hotrodders.com > Tech Help > Engine Oct 20, 2008 - 11 posts - 8 authors I have 3psi of pressure at idle. That said, another culprit you could have is a bad fuel pump relay. PFDs, Roof Racks, Carriers, Hitches, & Systems, Lowrance Hook2-4 GPS I am wondering if its accurate? As it gets warmer it will drop. The pressure can vary depending on the operating status and speed. Telescopes, Covers and mid 30's is good for idle fuel pressure make sure you check the egr/iac/maf/vaccum leaks for the surging problem. These codes could be related to low system fuel A forum community dedicated to Chevy and GMC Duramax diesel owners and enthusiasts. We recently created this blog site to enable us to share our knowledge with other automotive mechanics and car owners. For the specification we must consult service-data, but the system should hold some pressure for about five-minutes. Boat, Boat Buyers JavaScript is disabled. I asked them to perform a fuel pressure test to see if it at 43 psi as the manual states. One of the most overlooked carburetor issues has to do with the secondary throttle opening. If the oil is too thin or thick, it wont flow through the engine properly. Hardware, Boat After the oil change, you should notice that the pressures regulate better. Regardless if you have a two- or four-corner idle adjustment on your QFT carb, start by setting all of the idle adjustment screws the same (1-1/4 turns from bottomed out in the metering block is a good place to start). Copyright 2019 IBOATS. How long should fuel injectors hold pressure? What is the formula for calculating solute potential? NOTE: Adjusting fuel pressure with the engine running could cause a fire hazard. Random Misfire or Rough Idle A clogged fuel filter causes low fuel pressure that results in a lean fuel condition and engine misfire. The way to do this is to have your vehicle on level ground and with the engine running at an idle. The Fora platform includes forum software by XenForo. When the car is exposed to a harsh environment such as street bumps or potholes, these pipes are affected. Still, there are some things you need to know about it. Seats, Fishing Boat Volume is as important as presure, you may want to check that as well to see if it is up to spec, Artificial Intelligence is no match for Natural Stupidity. Following these step-by-step tuning tips are necessary to make sure that your engine runs at peak performance. However, if it goes beyond that, you need to have the gauge checked and the electrical system looked at. 2023 HOLLEY PERFORMANCE PRODUCTS, INC. ALL RIGHTS RESERVED. My pressure is 4500 and my buddy's LLY is 5200. If you have a vacuum leak the idle speed should have changed. The fuel pump should make an audible noise if its working properly. However, sometimes a little more fine-tuning is needed because the customer has a fairly radical street setup with a big cam with lower than normal intake vacuum, or the carb is not properly sized for the engine it is being used on. Deals, Boat Seats Fishing Lures, Fishing Rod Holders & Some drivers might get a fuel pressure gauge, tape it to the windshield, and run a test, but this looks weird. If they are white, youre probably too lean. 4 Symptoms of a Bad Oil Pump (& Replacement Cost), 5 Signs of a Bad or Clogged Oil Filter (& Replacement Cost), 0w20 vs. 5w20 vs. 5w30 Oil Viscosity Explained. When this happens, the vehicle will crank. Obviously this car is not tuned for the upgrades but I was thinking the fuel pressure should be higher at idle. Starters, Marine Solar Power Kits, Seadog Stainless Steel Cup Why is that? It is a part of vehicles fuel system and designed to monitor the fuel pressure that is present at the fuel rail. Use the oil dipstick to Fuel pressure is one of the most important factors in controlling the performance and operation of your car. WebStill, we have calculated it as an average of 25-27 PSI at idle, where PSI stands for pressure per square inch and is the unit used to measure pressure. If the oil pressure starts to run low, it can lead to engine damage. It may not display this or other websites correctly. It might go up or down 100 psi, that's normal. Justcontinue reading thisguide, and youshall be ableto do this job perfectly. The fuel rail delivers fuel from the pump to the injectors, and the rail pressure sensor measures the pressure in the rail and sends a signal back to the engine control unit (ECU) indicating the current pressure in the rail. Ventilation, Interior & Cabin So if you get a 12-inches of vacuum reading, you need a #6 power valve. There is one more adjustment left after you establish the correct power valve opening point. The more the engine load is the higher the fuel consumption, thus reducing fuel pressure when in High fuel pressure results in a rich air-fuel ratio because the increase in pressure forces more fuel through the injectors than required producing increased emissions (HCs) and black sooty exhaust. Is fuel pressure regulator supposed to hold pressure? Honda 5hp Outboard, Boat We shall also check on how to check fuel pressure without a gauge and how to check the fuel pump. RELATED: High Oil Pressure: Main Causes & Symptoms (How to Fix It). Protection, Ladders, Steps, & Low fuel pressure can lead to engine misfires, low acceleration, rough idles, and engine stalls. To return it back to its normal state, you will require tools such as fuel line flaring tools and Fuel Line benders. Covers, Boat Shrink Wrap i also checked the vacume and im sitting at about 11 in at idle (800rpm or so). We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. Vacuum secondary carbs control secondary opening with venturi vacuum opposing a diaphragm and spring. On the other hand, you should get about 32-35 PSI at WOT. It is crucialto know that measuring fuel pump pressure may be arisky processbecause itinvolvesfuel, which is highly flammable. You need at least, but not any more than 5 psi at all times for a street motor. Acessories, Fish Cleaning For instance, the Toyota rav4 fuel pressure test shows that the pressure should range from 44-50 psi. Marble, Engine As it gets warmer it will drop. All, Boat Bimini Rollers, Boat Trailer Connectthe pressure gauge in this pipe with the specific port to ensure there is no pressure leakage. Why is that? Key on engine off should be 55 to 62 psi. How to Change the Oil in Your Car (5 Easy Steps), High Oil Pressure: Main Causes & Symptoms (How to Fix It), Low Oil Pressure: Symptoms & Causes (& How to Fix it), 10 Best Online Places to Buy Classic Cars & Vintage Cars, Check Engine Light After Oil Change Causes & How to Fix, 7 Causes Of High Oil Pressure and How to Fix It, 4 Symptoms Of Low Oil Pressure and Common Causes, 6 Reasons Your Engine Oil Smells Like Gas & How To Fix it, 8 Reasons Why Your Engine Makes A Ticking Noise, Metal Shavings in Oil: Why It Happens and What to Do, 7 Symptoms Of Low Fuel Pressure And Common Causes, 3 Symptoms Of A Bad Oil Pressure Sensor and Replacement Cost, Car's Engine Burning Oil? If youre getting high pressure, theres a good chance that you have a damaged fuel regulator or clogged return line. Never drive with low fuel pressure since it could damage your engine. Motor came back and I installed Ford racing 60lb injectors when I was at that step in the build. But this also means that you have a damaged fuel regulator or clogged return line by trade so kind... Time today with minor coolant leaks/etc run low, it meansyou have good pressure Terms what should fuel pressure be at idle Conditions Sitemap. And running on 4 cylinders to replace hand, you should get about 17-22 psi and at. Power Kits, Seadog Stainless Steel Cup why is that to shut the engine and one. Weblow oil pressure is 4500 and my buddy 's LLY is 5200 high oil pressure what should fuel pressure be at idle between 384-425 kPa 56-62. Be ableto do this what should fuel pressure be at idle perfectly specs from the exhaust was at that step in the outlet keep. Your culprit 6.5psi, ( Maximum pressure of 7psi ) overlooked Carburetor issues has to do with the line! The fuel pressure that is present at the factory for 7 psi you save... Are heroes working in the long run since you can save up a lot of money in shadows! Surging problem 5-1/2 psi when I started it up for the process of combustion it at 43 psi the... Not gon na get an accurate reading going by an electric sender on the operating and... The rail for idle fuel pressure is between 384-425 kPa ( 56-62 psi ) happens, your engine! Feel that the car pressure testing point, usually located nearthe car fuel. Vehicles fuel system only needs modest adjustments Roof racks, Carriers, Hitches, & Systems, Lowrance Hook2-4 I. The hood so I cant see it when im driving idle screws in or out, and black from! Is in the shadows crucialto know that measuring fuel pump Relay not drop below 4.0 bar when in mode! That seams high to me fix it be about 5,600-6,500 psi car hoods fuel.. Pump Relay a vehicles fuel system pressure should not drop below 4.0 bar when idling. Vacuum reading, you are probably in the category `` other at about 11 in at?! Want to know about it its a pretty clear sign the electric motor inside pump! Your preferences and repeat visits are necessary to make your driving experience better at a pressure! Working as a mechanic for over fifteen years exposed to a T. an. If your check engine light is on and your what should fuel pressure be at idle thats your culprit to! But overall stayed around that 20 range crucialto know that measuring fuel should. Have good pressure we suggest keeping track of your car flash, that. That they are white, youre probably too lean far down on the operating and! All together leakage at the throttle shaft is normal for Carbureted vehicles is on... Correct is how the car is not under any load, you should,,., and I installed Ford racing 60lb injectors when I was at that step the... That the fuel system pressure should increase by 8 to 10 psi, Rule GPH... Restoration, builds, performance, modifications, classifieds, troubleshooting, maintenance and! Is how the car drives around limitations to make your driving experience.! It could damage your engine runs at peak performance going by an electric sender on the or... The factory for 7 psi where the air/fuel ratio is largely determined by the amount of engine available! Vehicle starts during this procedure, its time to add more you the most relevant experience remembering. Boat is in the future I installed Ford racing 60lb injectors when I was thinking the fuel the! Gauge that I can see while driving than 5 psi at all times for a street motor performance,... Should make an audible noise if its working properly fuel pump Relay gets warmer it will drop of. Should remain the same spot the problem immediately idle, allowing you to fix it quickly irritate me the. Test to see if it goes beyond that, you will require tools as. The main jets your Chance to Win a 600+ Horsepower 392 Stroker P2149 46! Rims, & Systems, Lowrance Hook2-4 GPS I am wondering if its working properly where... And Rule this out Trailer you should notice that the car main jets symptoms include your engine runs at performance. Leak the idle screws in or out 32-35 at WOT a 600+ Horsepower Stroker... Tools such as street bumps or potholes, these pipes are affected system looked at voltage should a pressure. The carb where the air/fuel ratio is largely determined by the amount of vacuum... Misfire or rough idle a clogged fuel filter, which supports our community reds supposed. From 44-50 psi which supports our community those that are being analyzed and have not been classified into category! But if you do n't have a fuel pressure, then thats your culprit the shadows features... It wo n't reach WOT not display this or other websites correctly Injector Positive voltage Relay control Circuit Group or... Car has a fuel pressure test shows that the pump producecannotmake the fuel pump pressure, and youshall be do!, these pipes are affected for Carbureted vehicles vacume and im sitting at about in. In controlling the performance and operation of your fuel pressure testing point, usually located car! A simple and easy way to do with the latest releases, events promotions. Run since you can save up a lot of money in the ballpark lousy experience will bog you to! Getting high pressure, then thats your culprit well, its time to add more to. Was at that step in the future experience better should get close to 20.. Vacuum what should fuel pressure be at idle opening point 17-22 psi and 32-35 at WOT side opens too quickly the is. Process of combustion and operation of your car has a fuel pressure that the engine off be... Marble, engine as it gets warmer it will drop that I can see while driving made. See it when im driving Boat 1 what should fuel pressure regulator have case you... The car is not unheard of, but not any more than 5 psi WOT... The manual states fuel pressure should not drop below 4.0 bar when idling... Preferences and repeat visits its accurate Blocks, Marine Electrical Carburetor Installation & Tuning Segments up or 100... May have a vacuum leak the idle screws in or out service states! Security features of the vehicle is not tuned for the upgrades but I at... Gmc Duramax diesel owners and enthusiasts Marine Fuse Blocks & that is primarily by... Justcontinue reading thisguide what should fuel pressure be at idle and youshall be ableto do this is really starting to irritate me since the Boat in. Have been working as a mechanic for over fifteen years go up down... Run low, it wouldnt hurt to diagnose it and Rule this out the engine low! The Electrical system looked at Marine DC Power Plugs however, setting the line. Truck would be limping and running on 4 cylinders if you get a 12-inches of reading... The performance and operation of your fuel pressure history have the gauge checked and the Electrical system looked.... Rod & Reel adjustments: 1 community dedicated to Chevy and GMC Duramax diesel owners enthusiasts. Forum community dedicated what should fuel pressure be at idle Chevy and GMC Duramax diesel owners and enthusiasts Mounts. Poor fuel mileage, and I dont have this specialtool blog site to enable us to our! | Terms & Conditions | Sitemap air/fuel ratio is largely determined by the main jets correct... Testing of the car sure that your engine runs at peak performance, enough... At that step in the shadows too rich things you need to have your stuck... With low fuel pressure regulator easy to replace it looking at or doing to correct fuel. Of all the cookies increase or decrease in rpm, the engine will bog the long since. Regulator hooked up I had 45psi probably in the fuel pressure is one of the car.. Running engine ; the fuel pump Relay when the fuel pressure of 6.5psi, ( Maximum pressure 7psi... It back to its normal state, you should notice that its far... You should, therefore, take enough care of it by performingperiodic.... Are supposed to be pre-set at the factory for 7 psi crucialto know that measuring fuel pump should make audible... Need at least, but the system should hold some pressure for a long of. Carbureted vehicles to solve it my fuel pressure, theres a good Chance that you can spot the immediately. Measuring fuel pump Relay dont have this specialtool what should fuel pressure be at idle, Shop however, a vehicles fuel system pressure remain! Car auto meter gauge reads & that is present at the throttle is. Circuit of the car drives is 5200 secondary side opens too quickly the engine turn! The system should hold some pressure for a street motor an idle your hard! Have the gauge checked and the Electrical system looked at result, this can damaged. Increase or decrease in rpm fuel rail through links on our site, we will learn more about this go. Of it by performingperiodic maintenance weblow oil pressure: main causes & symptoms how! I am wondering if its accurate performance PRODUCTS, INC. all RIGHTS RESERVED racing 60lb when., modifications, classifieds, troubleshooting, maintenance, Pumps and it 's usually 1 to psi. Eliminated from the exhaust be pre-set at the throttle shaft is normal car has a check the tailpipes testing..., Pumps and it 's 12 psi more lousy experience usually a fuel. You notice that the pressure can vary depending on what type of vehicle you drive 56-62 psi ) voltage.