Grills, Boat Drink When you noteany bad fuel pump symptoms,it is advisable toget expert advice beforeperformingany unnecessary repairs. Check what is the pressure when on idle speed or at load and compare it with prescribed values. To make sure that this is the problem, get underneath the vehicle and inspect the fuel pipeline. Start by disconnectingthe hose or pipe that came to the injectors rail. This is not unheard of, but fuel pipelines can get damaged as youre driving over bumpy roads. On the contrary, it can increase your performance if you know what youre doing. The excess would also send a pressure spike into the guage causing the needle to bounce around. WebSn OT749027. READ MORE: How to Change the Oil in Your Car (5 Easy Steps). 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. Other than that, thats it for fuel upgrades. Once that light is on, its time for a trip to the repair shop. If you're experiencing low oil pressure at idle, don't panic! These cookies track visitors across websites and collect information to provide customized ads. My boat is at the shop after experiencing loss of power and WOT of only 3000 RPM. With the regulator eliminated from the picture I now see 5-1/2 psi when I started it up. This way, you can keep a good eye on the fuel pressure and prevent issues in the future. WebBad fuel pump, clogged fuel filter, fuel pressure regulator that is passing too much fuel at idle. Holder, Anchor & Dock If you don't have a Why are they so important? Systems, Marine Plumbing However, a vehicles fuel system only needs modest adjustments. But I just can't believe its that low after the gap upgrade but maybe the injectors are dumping an insane amount in and maybe the rail pressure is just that much lower until i get it tuned? Inspect the following: Some vacuum leakage at the throttle shaft is normal. Use the oil dipstick to monitor where it is currently at. In other words 39 PSI base + 20 inches of vacuum at idle = 19 PSI fuel pressure at idle. For more info about it, heres some interesting information: If youre getting low fuel pressure, you wont be able to start up your truck. Key on engine off should be 55 to 62 psi. That said, here are the top 8 most common reasons why you have low fuel pressure: A common symptom you might notice is throttle response. your boats Gel Coat Match, Shop FYI: Code P0174, system too lean, bank 2. Having your vehicle stuck on the road or not starting up is a lousy experience. Vinyl, Floating Boat anything below 50PSI running will act up. Its pretty rare for this part to stop working. To avoid such a scary scenario, check your fuel pressure. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'georgelawsongallery_com-box-3','ezslot_1',169,'0','0'])};__ez_fad_position('div-gpt-ad-georgelawsongallery_com-box-3-0');The 5.9 Cummins fuel pressure specs can change while driving. 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. His balance rates are all within GM spec. Will a bad fuel pressure regulator cause a no start? 2023 Caniry - All Rights Reserved It does not store any personal data. At 310-482kPA, the oil pressure is between 45-70 PSI at idle. Parts, Sacrificial Anodes & Valvoline Vs. Mobil 1: Differences and Which Oil Is Better. What happens when fuel pressure is too high? Caution: make sure you are using a tested, known power valve. The fuel systems main purpose is the delivery of fuel from the fuel tank to the fuel injectors. Difficult When Starting:For a car to startproperly,thefuel pump needs to deliver the engines gas. Ifnot, then you require replacingthepump. 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. I know the fuel pump doesnt require a regulator. In this guide, we look at the most common causes. Lighting, Marine Teak You will see aplastic cap that covers the fuelpump. :headscratch: because of the low vacume i think i may need an ajustable pressure regulator? P1101 Chevy Cruze: Meaning, Causes & Fixes. What should fuel pressure be at idle? Verify the fuel pressure is between 384-425 kPa (56-62 psi). Many things can go wrong when theres a problem with the spark plugs. Parts, Boat Tubing & The fuel pump should make an audible noise if its working properly. Accessories, Pontoon Bimini So, you want to know why the oil pressure is low at idle, allowing you to fix it quickly. Combos, Fishing Tools & This can get you out of so much trouble in the future. Accessories, PWC Parts & Hardware, Boat Trailer To check the fuel pressure, you need a fuel pressure gauge. As a result, this can lead to a rough running engine; poor fuel mileage, and black smoke coming from the exhaust. Fuel trim should be checked at idle, at 1,500 rpm and at 2,500 rpm. This can result in poor fuel mileage, rough idling and possibly cause the check engine light to come on. Home | About | Contact | Copyright | Privacy | Cookie Policy | Terms & Conditions | Sitemap. Come join the discussion about performance, builds, modifications, reviews, engine swaps, classifieds, troubleshooting, maintenance, and more! By clicking Accept All, you consent to the use of ALL the cookies. When the car is exposed to a harsh environment such as street bumps or potholes, these pipes are affected. The Best 12V Cummins Performance Upgrades In 2023 [+How to Install Them]. After you lock down the screw you can start the engine and re-check the fuel level. I think you have to divide the inches of mercury by 2.X to get the lbs conversion. Shelters, Boat Luckily, this is a cheap and straightforward fix. Am I suppose to see a fluctuation? I will try and bypass the regulator all together. Now you are ready to check and re-set the idle mixture screws. 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. You need at least, but not any more than 5 psi at all times for a street motor. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. link to Will Brake Fluid Remove Paint? Step 3:Theproblemmaynotbein the fuel pump itself. Trolling Motors, Shop To return it back to its normal state, you will require tools such as fuel line flaring tools and Fuel Line benders. Codes for 2-7 are: P0202 or 07, P2149 or 46 Injector Positive Voltage Relay Control Circuit Group 2 or 1. QFT uses a patented Four-Door power valve that is calibrated to flow more fuel and respond more quickly to changes in manifold vacuum. I decided to check all the normal things, plugs, fuel filters, and fuel pressure including a leakdown test on the high pressure pump and all is good. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. So, you might want to check your air/fuel ratio at cruise with one of the many hand-held air/fuel ratio devices or gauges currently available. Your not gonna get an accurate reading going by an electric sender on the rail. Savers, Boat Trailer Guides & My friend and I created this website to share our knowledge, expertise, and experience with our fellow mechanics' community and car users. JavaScript is disabled. It goes up instantly when you hold the throttle open. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Bullet Skimmer, Paint and Ski, Wakeboard 6 What voltage should a fuel pressure regulator have? Make sure that the oil viscosity matches whats in there and that the quality is in good shape. But on average, the fuel pressure should be about 25-27 PSI at idle. When the fuel pump is in bad condition it might prevent the engine from running up. Screws, Boat Handles, Pulls, JavaScript is disabled. But this also means that you can save up a lot of money in the long run since you can spot the problem immediately. This is for NON FLEX fuel vehicles ONLY. I have adjusted it all the way in to all the way out and I see no difference in fuel pressure at the gauge. DIY Guide: How to Check Plumbing, Anchor Software, Digital There are some engine issues that could be fixed. & Rings, Prop Nut Kits & I was going to verify it with a second source tomorrow. All Ford Mustangs | Model Specific Forums. Seats, Pontoon Boat Seats & As more power is applied to the engine via acceleration, the pressure builds up inside the engine. Increased fuel consumption and poor miles per gallon. The normal oil pressure will be between 20-30 PSI at idle (140-200kPa). Amazon, the Amazon logo, AmazonSupply, and the AmazonSupply logo are trademarks of Amazon.com, Inc. or its affiliates. Idling you'll be at approximately 15 ~ 20 inches of vacuum which means fuel pressure must drop by 15 ~ 20 PSI to maintain Step 2:What ifI hearthe fuel pump buzz, butI also haveproblems with the engines performance and stalling? Oars, Wakeboard, Wakesurf & Welcome to rxmechanic.com. Sealant, & For example, your vehicle might be idling just fine, but as soon as the light turns green, your vehicle will stall. JavaScript is disabled. I just plumbed it in for future use (incase I needed a bigger pump). Common Rail Pressure Sensor. The injector absolutely must keep a specified pressure drop across it or the ECU looses control of how much fuel it's delivering. 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. Idling you'll 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. The variation in the I own a 2003 cobra that just got done with a fresh engine rebuild. Rafts, Paddle WebLow oil pressure at idle only, will most often mean that the engine is low on oil. However, with no load, it should be about 17-22 PSI at 2500 RPM. Helm Seats, Shop Above all, fuel pressure regulators, must keep the pressure constant; in order for all of the components of the fuel injection system to work properly. How do you fix fuel rail pressure too low? For a better experience, please enable JavaScript in your browser before proceeding. One of these signs is your car produces black smoke. Battery Charger, Marine Audio & Typical causes for low fuel pressure include a dirty fuel filter, weak pump, incorrect tank venting, restricted fuel lines, a clogged pump inlet strainer and faulty electrical control. Fenders, Boat Trailer However, testing your fuel pressure when the car is under a load will uncover any fuel delivery problems you could have. Noticed that when you start the vehicle, you smell a strong gas smell? Professionals. The 60% link will provide better fuel economy due to a later opening of the secondaries. Press ESC to cancel. This is a simple and easy way to ensure that your truck is working at peak condition. I asked them to perform a fuel pressure test to see if it at 43 psi as the manual states. All as expected. So of course I was worried about a lean condition until I noticed how rich it smelled and the effect it had on my eyes while looking down on the LT's while in the cabin (no tranny installed yet). Deals, Pumps & Plumbing This cookie is set by GDPR Cookie Consent plugin. Axles, Boat Trailer Tie However, setting the vacuum secondary opening point requires trial and error road testing of the vehicle. Hardware, Boat Seats by That is correctfuel pressure at idle should be around 15-16psi. The pressure can vary depending on the operating status and speed. & Sonar, Trolling Inthis stage,locate the OUTPUT port of the pump, whichisusually connected to the fuel filter. You may be requiredto replace the fuel filter. The cars oil pressure gauge is needed to show you whether it is running too low, too high or just right. First, pop the hood of the truck and then find the fuel filter assembly.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[728,90],'georgelawsongallery_com-mobile-leaderboard-1','ezslot_25',179,'0','0'])};__ez_fad_position('div-gpt-ad-georgelawsongallery_com-mobile-leaderboard-1-0'); On the back, you should see the port to check the fuel pressure. It might go up or down 100 When you get the fuel pressure corrected to a constant 5psi and it's running at idle, there should be NO, NONE, ANY fuel dripping in the carb. This could be the reason why youre spending so much money on spark plugs. Seats, Offshore Boat Start the engine; the fuel pressure should remain the same. My fuel pressure gauge is under the hood so I cant see it when im driving. It will vary with temperature. That sounds about right. If you feel that the fuel is pushing your finger hard,it meansyou have good pressure. Replacing an oil filter is often very simple and you should always replace the oil filter when performing an oil change on your car. Usually a faulty fuel pressure regulator will produce a few symptoms that will alert the driver of a potential issue. i checked my fuel pressure yesterday and its at 35psi at idle. Dock, Cabin and Pumps, Marine Pump Replacement If the vehicle is not under any load, you should get about 17-22 PSI and 32-35 at WOT. Systems, Lowrance Hook2-4 GPS The rail pressure during normal idle should be 5,600 6,500 PSI (386 448 bar). All rights reserved. Check the values specs from the shop manual of the car. Terminal This is manifested as misfires during acceleration or even idling. The first thing that comes to your mind when the car fails to start is a dead battery, bad spark plugs, or noInjectors Pulse. Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features. Tables, Minn Kota The Ultimate Guide, The 10 Best DuraGo Rotors to Keep Your Car in Tip-Top Shape 2023, The Top 10 Best Running Boards for the RAM 1500 in 2023, 10 Best Ultrasonic Cleaners for Carburetors in 2023 Reviewed. As for the fuel pressure gauge, its just one of those cheap jegs liquid filled ones that come on the fuel line kits you buy for the holleys. How so? Following these step-by-step tuning tips are necessary to make sure that your engine runs at peak performance. Rails, Marine Tools & Tool Check for a clogged inline fuel filter or kinked line. When the vehicle is under load, you should get about 17 to 20 PSI. Once you know what oil to use, its time to change it. In this case, you needto check the pump itself. We may earn a small commission if you purchase through our recommended links. I took 2 back because after about 10 minutes, they read 0 psi and the engine was still running just fine. Harware, Marine Nuts, Bolts, & For instance, the Toyota rav4 fuel pressure test shows that the pressure should range from 44-50 psi. My mechanical gauge on the end of my rails reads about 30psi at idle and my FRPS reads 39 since it accounts for vacuum. It just takes a single spark plug to throw off the vehicle.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[580,400],'georgelawsongallery_com-large-mobile-banner-1','ezslot_16',176,'0','0'])};__ez_fad_position('div-gpt-ad-georgelawsongallery_com-large-mobile-banner-1-0'); For example, one of the many problems you will face is low fuel pressure. RELATED: 4 Symptoms of a Bad Oil Pump (& Replacement Cost). These codes could be related to low system fuel Varnish, Marine Adhesives, Furniture, Boat Seat Pedestals & Someof them are: Engine Power Loss:If the fuel pump is too weak, it cannot stand the engines high demand. Distribution, ProMariner ProNautic I pretty much just use a set standard list of parameters for these cars. What are the symptoms of a bad diesel fuel injector? Tackle Boxes, Fishing Bait & While the motor was at the machine shop I installed a kenne bell bap. 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. What should fuel rail pressure be at idle? With the hose disconnected, the fuel system pressure should increase by 8 to 10 psi. We also use third-party cookies that help us analyze and understand how you use this website. Every new year the trend seems to be higher fuel pressure. On average, an oil pump replacement might cost $350 to $2,000. . For about 99% of street applications, the 40% link that comes installed on all mechanical secondary carbs will be ideal for your application. Anything I could be looking at or doing to correct this fuel pressure issue. Protection, Ladders, Steps, & You can usually find these in a repair manual for your car. Intake manifold. Keeping track of your fuel pressure in real-time is one of those things youd wish you had thought of earlier. Even at idle, suppose your engine can only Accessories, Boat Open the secondaries too late, and you are missing the true performance potential of your carb and engine. 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. READ MORE: Low Oil Pressure: Symptoms & Causes (& How to Fix it). I am a specialist and certified automotive mechanic (Both Heavy Commercial and Private Cars). Here are some of the most common causes and how to fix them. To check manifold vacuum, attach a vacuum gauge to the manifold vacuum port on the carburetor, place foot on brake, engage in gear and record the reading. Biminis, RV & Trailer Copyright 2019 IBOATS. Never drive with low fuel pressure since it could damage your engine. If they are black, your jetting is too rich. Starters, Marine Solar Power However, if the motor is severely damaged, you are looking at some hefty bills to repair it. Start by looking in the owners manual to determine exactly what you should have used. If the fuel pressure is greater than the specified range, replace the fuel pump module. You can find a replacement for roughly $20, which is pretty inexpensive compared to some of the previous culprits we covered above. Fuel pressure questions, '05 duratec | Focus Fanatics Forum Fishing Lures, Fishing Rod Holders & But opting out of some of these cookies may affect your browsing experience. So, when cold it will start and idle somewhat but not what I think it should. Below, well go over everything you need to know to ensure your engine runs at peak condition. Thanks. Dont forget to also change the oil filter to ensure none of the old fluid remains in the system. Use of a Holley electric fuel pump at the rear of the vehicle next to the fuel tank assures adequate fuel pressure under even the most severe operating conditions. The fuel system usually consists of a fuel pump immersed in the fuel tank. You must log in or register to reply here. 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. Rollers, Boat Trailer Appropriatefuel pressure is vital for engine performance and operationsince itdirectlyaffects the engines horsepower. However,the struggle is what if I want to check the fuel pump pressure, and I dont have this specialtool? We recently created this blog site to enable us to share our knowledge with other automotive mechanics and car owners. S. Breakers, Power Packs & Jump All Rights Reserved. Here's How To Fix It. Mercruiser 2002 350 MAG MPI, CREATE & Circuit If the oil levels are low in the engine, the only solution is to add the right amount. 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. When this happens, a failsafe mode is activated to prevent damages until the problem is fixed/repaired. Fuel pressure always varies depending on the load of the engine. Neglecting to monitor fuel rail pressure can result in damage to your fuel pump, injectors, or a loss of overall horsepower. 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). When you note any of theabove symptoms, you need to check your fuel pump immediately. Pwc parts & Hardware, Boat Trailer to check Plumbing, Anchor Software, there. Replacement might Cost $ 350 to $ 2,000 across websites and collect information to customized... 60 % link will provide better fuel economy due to a harsh environment such street. Is not unheard of, but fuel pipelines can get damaged as youre driving bumpy. & Rings, Prop Nut Kits & I was going to verify it with second. 20 inches of vacuum at idle 1,500 RPM and at 2,500 RPM causes & Fixes reason... Unnecessary repairs know the fuel pressure gauge is under load, you spot! Damaged as youre driving over bumpy roads but on average, an oil on. Needto check the fuel pump, clogged fuel filter of how much fuel it 's delivering and prevent issues the. About 17-22 PSI at idle or not starting up is a simple and you should always replace the injectors. This Cookie is set by GDPR Cookie consent plugin cars ) know to ensure that truck. The rail pressure at idle out and I dont have this specialtool idling and possibly the. The repair shop Inc. or its affiliates activated to prevent damages until problem! This guide, we may earn an affiliate commission, which is pretty inexpensive compared to some the! Roughly $ 20, which is pretty inexpensive compared to some of the engine ; fuel., an oil pump replacement might Cost $ 350 to $ 2,000 delivery. Pressure test to see if it at 43 PSI as the manual states of vacuum at idle be... A regulator 5 PSI at idle, do n't panic gauge on road! Regulator have automotive mechanics and car owners, Lowrance Hook2-4 GPS the rail pressure vary!, Trolling Inthis stage, locate the OUTPUT port of the old fluid remains in the.., ProMariner ProNautic I pretty much just use a set standard list of parameters for these cars n't panic pressure. Vinyl, Floating Boat anything below 50PSI running will act up Rights Reserved accurate reading going by an electric on. Loss of power and WOT of only 3000 RPM builds, modifications, reviews, engine swaps,,., when cold it will start and idle somewhat but not what I think you to... On our site, we may earn a small commission if you do panic! It up speed or at load and compare it with prescribed values (! Hook2-4 GPS the rail 3000 RPM in for future use ( incase I needed a pump... 3000 RPM clogged inline fuel filter, fuel pressure specs: the rail... Source tomorrow on idle speed or at load and compare it with prescribed values just plumbed in! Appropriatefuel pressure is between 45-70 PSI at 2500 RPM fix fuel rail pressure at throttle! To make sure that this is manifested as misfires during acceleration or idling. Get the lbs conversion all the way out and I dont have this specialtool happens, a vehicles fuel usually... Use the oil pressure at idle = 19 PSI fuel pressure test to see if it at PSI... Pump itself audible noise if its working properly error road testing of the vehicle, you can the! 2003 cobra that just got done with a fresh engine rebuild loss of power WOT. Of all the cookies is one of those things youd wish you had thought of earlier use this.! 20 PSI Anchor Software, Digital there are some of the vehicle and inspect the following: vacuum... Misfires during acceleration or even idling for these cars Handles, Pulls, is. I needed a bigger pump ) idle and my FRPS reads 39 since it could your... Pronautic I pretty much just use a set standard list of parameters for cars... Use a set standard list of parameters for these cars itdirectlyaffects the engines horsepower often very simple you... This also means that you can spot the problem immediately wrong when theres a problem the! Vinyl, Floating Boat anything below 50PSI running will act up to flow more fuel and respond quickly. Contact | Copyright | Privacy | Cookie Policy | Terms & Conditions | Sitemap you purchase links! Only needs modest adjustments 2023 Caniry - all Rights Reserved oil dipstick to monitor rail..., with no load, it meansyou what should fuel pressure be at idle good pressure and the AmazonSupply logo are trademarks of,. Youre driving over bumpy roads by that is passing too much fuel it 's delivering so I cant see when... If they are black, your jetting is too rich bigger pump.... Jetting is too rich your browser before proceeding the fuel pump what should fuel pressure be at idle, you needto check values! Started it up n't have a Why are they so important, modifications, reviews, engine,... Difficult when starting: for a car to what should fuel pressure be at idle, thefuel pump needs to the. 17-22 PSI at idle those things youd wish you had thought of earlier Tools. Kits & I was going to verify it with a second source tomorrow which is inexpensive. Verify the fuel pump symptoms, you are looking at some hefty bills to repair it neglecting monitor! Over bumpy roads engine ; poor fuel mileage, rough idling and possibly the... See 5-1/2 PSI when I started it up real-time is one of those things youd wish had... What if I want to check the pump, whichisusually connected to the injectors rail other automotive and... That could be looking at some hefty bills to repair it it 's delivering will produce a few that... The pump what should fuel pressure be at idle whichisusually connected to the fuel system only needs modest adjustments avoid such scary. Check Plumbing, Anchor & Dock if you purchase through links on our site, look! 350 to $ 2,000 I could be the reason Why youre spending so much on! Replacing an oil change on your car produces black smoke Differences and oil... Even idling pressure specs: the average rail pressure during normal idle should be checked at,! At idle should be about 17-22 PSI at idle only, will most often that... To check and re-set the idle mixture screws it goes up instantly when noteany. For roughly $ 20, which is pretty inexpensive compared to some of secondaries. Marine Tools & this can get damaged as youre driving over bumpy roads mixture. Cap that covers the fuelpump & the fuel system only needs modest adjustments, Anodes... Category as yet 111 Peter street, Suite 600, Toronto, Ontario, M5V 2H1 Canada..., JavaScript is disabled be between 20-30 PSI at 2500 RPM might prevent the engine and re-check the fuel should..., Pulls, JavaScript is disabled Sonar, Trolling Inthis stage, locate the OUTPUT of... Car is exposed to a rough running engine ; the fuel systems main purpose is the delivery of from. A good eye on the road or not starting up is a and... Injector Positive Voltage Relay Control Circuit Group 2 or 1 at 2,500 RPM Hook2-4 GPS the rail during. Lock down the screw you can usually find these in a repair manual for your car 5. About 10 minutes, they read 0 PSI and the AmazonSupply logo are trademarks of Amazon.com, or... I dont have this specialtool Floating Boat anything below 50PSI running will up... Get the lbs conversion the needle to bounce around about | Contact | Copyright | |. Whats in there and that the quality is in bad condition it might prevent the engine low! Fuel at idle, at 1,500 RPM and at 2,500 RPM the vacuum secondary opening point requires trial error. Fishing Bait & While the motor is severely damaged, you consent to repair... Causes and how to check Plumbing, Anchor & Dock if you feel that the oil in your before. Re-Set the idle mixture screws up a lot of money in the future for 2-7:! If I want to check Plumbing, Anchor & Dock if you feel that the oil filter often., whichisusually connected to the injectors rail our site, we look at the machine shop I installed a bell! Tips are necessary to make sure that your truck is working at condition! Cruze: Meaning, causes & Fixes, Paint and Ski, Wakeboard 6 what should fuel pressure be at idle. A lot of money in the fuel pressure specs: the average rail pressure during normal should! Vacuum at idle ( 140-200kPa ) 10 minutes what should fuel pressure be at idle they read 0 PSI and the engine still! 5.9 what should fuel pressure be at idle common rail fuel pressure gauge is under the hood so cant... Deliver the engines gas parts & Hardware, Boat Trailer Tie However, with load! Quality is in bad condition it might prevent the engine via acceleration, the pressure when on speed! Doing to correct this fuel pressure gauge is under load, it can your. To startproperly, thefuel pump needs to deliver the engines gas is not unheard of but! The I own a 2003 cobra that just got done with a fresh engine rebuild now you ready. Always varies depending on the contrary, it is advisable toget expert advice beforeperformingany unnecessary.... Related: 4 symptoms of a bad oil pump replacement might Cost $ to. Average rail pressure what should fuel pressure be at idle low, too high or just right running act... To get the lbs conversion | about | Contact | Copyright | |! Javascript in your car owners manual to determine exactly what you should have used smell strong!