Question about 1998 GMC Jimmy

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I need to know the fuel pump normal pressure for a gmc jimmy 1998

I want to test the fuel pump

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  • jorgequ3 Jan 18, 2009

    It´s important to me to know the pressure in lb/plg2 because I have an intermittenr fault and may be the pump is worn



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You can pull the line off of the fuel filter and stick it into a bottle and have some one turn the key on and see if gas is coming out then if it is try it on the one on the block and see if fuel is reaching there

Posted on Jan 18, 2009


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2 Answers

Will turn over but it wont start

What is the fuel pressure? these trucks need a certain amount of pressure to start, if low just 3psi it will not start, if you are sure the pump is good then you may bad spider injector. check fuel pressure first and also try spraying starting fluid into throttle body and see if truck starts. the pump needs 60 -66 psi to start the truck.

Oct 06, 2012 | 1998 GMC Jimmy

1 Answer

Fuel pump pressure specs for 2001 gmc jimmy

see the indication for manufacturer specification which is the pressure.
of fuel pumps.
God bless you

Oct 05, 2012 | 2001 GMC Jimmy

1 Answer

2000 GMC JIMMY What controls turning on fuel pump

The pump is powered by the relay. The relay is grounded by the computer. It gets a ground signal for the first 3 seconds, then only if the computer sees oil pressure or RPM to know the engine is running.
You should be able to ground the relay and run the pump for several minutes. After 30 seconds you should be at max pressure.
Normal pressure is 15psi for a truck that has throttle body injectors such as a mid 80s model, and 65psi for trucks that have port fuel injection like yours.
You may have the wrong pump.

Sep 05, 2012 | 2000 GMC Jimmy

1 Answer

How to release fuel system pressure 1998 gmc jimmy to change fuel pump

If you have a schrader valve on the engine,use that,
if not, pull the ignition fuse & crank the engine

Jun 27, 2011 | 1998 GMC Jimmy

4 Answers

What is the fuel pressure for a 1998 GMC Jimmy


The fuel system pressure for your Jimmy is 55-61 PSI (Pounds per Square Inch)

Vent the fuel tank vapors by loosening the fuel cap. Position the ignition switch and the A/C system in theoff position. Install a fuel pressure gauge to the vehicles fuel pressure valve. Confirm that no leaks are present, and with the key ON, engine OFF verify the PSI reading on the gauge.

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Sep 03, 2010 | 1998 GMC Jimmy

1 Answer

Fuel pump not comeing on 1998 gmc jimmy how to test the pump?

this is the highest failure rate of any part. I've been in auto parts for nearly 10 years and one thing is certain, you need to replace your fuel pump. Do not get a Carter brand pump. ONLY get a Delphi or Genuine GM pump. The less expensive pumps last about 1000 miles.

Dec 29, 2009 | 1998 GMC Jimmy

1 Answer

1998 jimmy 4.3 fuel pressure leaks down over a few hours

Have you tried a new fuel filter, otherwise, or in addition you may have to have the fuel pressure tested to see what the pump condition is.

Sep 09, 2009 | 1998 GMC Jimmy

1 Answer

2000 gmc jimmy wont start fuel pump comes on and cuts off but will not start.I have changed the fuel filter and that did not work. Is the pump not building the pressure it needs to start or would my...

When you hook the pressure test guage to shrader valve on fuel rail what it reads is what the pressure is from pump, around 60 p.s.i. all you need to do is hook up the guage and turn on key, you do not have to turn engine over, and if pump is good it will shoot up to 58 or 60 right now.

Feb 14, 2009 | 1999 GMC Jimmy

1 Answer

Electric fuel pump

under the hood on the top of the engine u will find the metal fuel supply rail, on that rail there is a metal valve it looks just like a tire valve, u check the fuel there with a test guage that screws on there at that port, the test guage is cheap and avail at any good parts store.

Dec 14, 2008 | 1998 GMC Jimmy

2 Answers

1998 GMC Jimmy, bogged down, stalled and won't sart back up

does it have spark? you did verify fuel pump working properly? could it have a clogged converter? is the engine lite on?

Nov 16, 2008 | 1998 GMC Jimmy

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