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Loosing fuel pressure - 1998 Ford Escort

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There should be about 40# of pressure at the fuel rail. If you are getting pressure here, but its not enough to sustain your car's engine, then this sounds like a blocakage in the fuel lines. Have you checked your fuel filter?

Posted on Aug 30, 2010

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I have a 1995 Chevy tahoe 307 engine for some reason it not getting full power like going on a hill were it start to hesitant and cuts off I was wondering what the reason why it doing that


Either bad spark plugs, or check for any loose connections, like where electrical connections are. Sensors, big computer connectors.

Mar 05, 2015 | 1995 Chevrolet Tahoe

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Why is my 1987 ford ranger acking iike its loosing fule pressurs win diving


It may BE losing fuel pressure, Robert. Check the fuel pressure and flow rate at the fuel rail. Filter, plugs, and cap have nothing to do with fuel pressure - your fuel pump and pressure regulator are the only things that can change fuel pressure very much.

Aug 08, 2014 | 1987 Ford Ranger

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Runs for 5 seconds then dies


to know if fuel pump can achieve pressure is pinch the fuel return line pressure should raise more than 50 if yes regulator is defect or injector leak
when you test fuel pressure make sure pressure can be maintain steady if not you loose pressure from injector,check valve in fuel pump
hope it helps

Mar 16, 2014 | Buick Regal Cars & Trucks

1 Answer

Losing fuel pressure


If the fuel is not leaking onto the road, the fuel high pressure system is failing. Clean or replace the fuel filters, they are probably blocked with dirt. If that does not work, replace the fuel pump.

Jan 09, 2013 | 2004 Ford Explorer Sport Trac

1 Answer

2002 chevy tahoa 5.3 codes p0171 0174


Trouble Code: P0171

Fuel Trim System Lean (Bank 1)

Possible Causes:


Air leaks in intake manifold, exhaust pipes or exhaust manifoldFuel control sensor is out of calibration (ECT, IAT or MAF)Low fuel pressure (fuel filter clogged, pressure regulator failure)One or more injectors restricted or pressure regulator has failedHO2S element is contaminated, deteriorated or has failedVacuum hose is disconnected, broken, leaking or loose.Trouble Code: P0174

Fuel Trim System Lean (Bank 2)

Possible Causes:


Air leaks in intake manifold, exhaust pipes or exhaust manifoldFuel control sensor is out of calibration (ECT, IAT or MAF)Low fuel pressure (fuel filter clogged, pressure regulator failure)One or more injectors restricted or pressure regulator has failedHO2S element is contaminated, deteriorated or has failedVacuum hose is disconnected, broken, leaking or loose.

Dec 27, 2012 | Cars & Trucks

1 Answer

P0171 AND P0174B WHAT DOES IT MEAN?


Trouble Code: P0171

Fuel Trim System Lean (Bank 1)

Possible Causes:


Air leaks in intake manifold, exhaust pipes or exhaust manifold.Fuel control sensor is out of calibration (ECT, IAT or MAF.)Low fuel pressure (fuel filter clogged, pressure regulator failure).One or more injectors restricted or pressure regulator has failed.HO2S element is contaminated, deteriorated or has failed.Vacuum hose is disconnected, broken, leaking or loose.Trouble Code: P0174

Fuel Trim System Lean (Bank 2)

Possible Causes:


Air leaks in intake manifold, exhaust pipes or exhaust manifold.Fuel control sensor is out of calibration (ECT, IAT or MAF).Low fuel pressure (fuel filter clogged, pressure regulator failure).One or more injectors restricted or pressure regulator has failed.HO2S element is contaminated, deteriorated or has failed.Vacuum hose is disconnected, broken, leaking or loose.

Oct 24, 2012 | 1999 Chevrolet Express

1 Answer

F-250 diesels blowing white smoak? Why?


More than likely your loosing fuel pressure, you may need a new under hood fuel filter and the low pressure pump located on the frame rail on the driver side of the truck. The ICP sensor (Injector Control Pressure Switch) could also be bad and cause this. But normally if your blowing white smoak and your loosing power at the same time I would say fuel pressure. But if your not loosing power and just have white smoak I say ICP sensor. Also check your engine oil, if its low or extremely dirty, this can cause this also. It uses the oil pressure to run the ICP sensor to control the injectors.

Jul 22, 2011 | 2005 Ford F 250 Super Duty

1 Answer

Just replaced the fuel pump on my Toyota Corolla 2005 and apparently looses pressure when is parked for a while, causing a difficult start. Thanks. Carlos Kall


If you had the pressure tested and is actually low after setting, then the only thing to look for is a leak, If there is no line leak as in the tubing not the connection, there are usually only three connection points for fuel lines at the tank, fuel filter or fuel injector rail, these are most likely place to loose pressure in the line, usually evidence by stains or liquid fuel present

Oct 04, 2010 | Toyota Corolla Cars & Trucks

1 Answer

Runs rough and pops on excelleration


if you have a fuel pressure gauge i would check fuel pressure at fitting on fuel rail.Backfiring sounds like fuel starvation,if no fuel pressure gauge pull fuel filter off and see if its clogged by trying to blow thru the filter.Be carful to releive fuel pressure before loosing the filter

Mar 26, 2010 | 1991 Buick Park Avenue

1 Answer

I have a chevy van g 20 with a 350 engine. It drive fine at time but it will start loosing pressure and it turns off and start chocking. I placed in in the computer and it said it was the fuel pump. I...


loosing fuel pressure, have you replace fuel pressure regulator, if the regulator is bad, it will have not enough pressure in between the injectors and the regulator. the fuel regulator maintain a proper pressure so the injectors will spray the correct amount of fuel every time the computer tells its to. weak pressure will cause injectors not to spray correct amount of fuel into the intake although will cause your engine to starve for fuel just like you have explained. the parts cost around 135 bucks and easy to replace.

Sep 25, 2009 | 1993 Chevrolet G20

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