Question about 1999 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 pressure regulator be bad. Pressure at start should be 60-66 psi and it dose not look like it is getting that when it is turned over and the pressure valve is pressed. Nothing happens when I depress the pressure valve after trying to start it and no one is turning the key to crank it.what could this be?dose the fuel pressure regulator have anything to do with the pump pressure to the fuel pressure check valve or is that valve just to check the pressure of the pump?

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Genius:

    An expert who has answered 1,000 questions.

  • Master
  • 1,118 Answers

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.

Posted on Feb 14, 2009

2 Suggested Answers

afarri
  • 1386 Answers

SOURCE: I have a 1999 gmc pu 1500 5.7 no start no codes

Hello and welcome to FixYa!
I would suspect a faulty ECM (engine control module). The ECM is like a car's brain that when it's faulty something will surely fail. I believe that you'll be good after the ECM replacement.
Hope this helps and thank you for using FixYa! Have a good one!

Posted on Sep 08, 2011

66 chrgr
  • 1011 Answers

SOURCE: 2000 gmc jimmy wont start fuel pump comes on and cuts off...

the fuel pressure if leaking could cause this the regulator is located under the intake plenum but you should smell gas .if you dont then most likely the pump is bad ,the pump will come on for 2 seconds when the key is on then go off it will not stay on with just the key on only when you crank it will it .so have your fuel pressure checked with a gauge.

Posted on Mar 22, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

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

1989 gmc 15 truck engine trun but wont start i replaced the fuel pump and it still wont pump fuel i can't find a fuel pump fuse the fuel pump relay is good.


check you owners manual for a fuel shut off switch. they are only supposed to cut out in an accident but mine does it sometimes anyway. different car

May 06, 2011 | 1989 GMC S-15 Jimmy

1 Answer

My name is matt and i have a 2000 gmc jimmy and it takes about 3 KEY TURNS TO START! once its started it runs! but if i cut it off ad then try to restart it it wont start till i pour fuel in my engine...


sounds like either you have a fuel pump going out or you have a fuel line that is leaking and causing air to get in the line causing the fuel system to lose it's prime.

Jan 08, 2011 | 2000 GMC Jimmy

1 Answer

My 2000 GMC Jimmy cranks but wont start unless i try repeatedly or pour fuel into the intake , then it runs fine until i let it sit for hours and then the sameproblem occurs... any ideas info. or know how...


Hi, had same problem with my truck. you need to replace your fuel pump because it no longer holds the pressure in your fuel rail. If you cycle your ignition on and off multiple times(this will cycle the fuel pump relay) with out turning over the engine then start it normally, that is the problem.

Aug 22, 2010 | 2000 GMC Jimmy

1 Answer

2000 Jimmy- fuel pump on, cranks good, starts intermittently- sometimes wont start- Ideas??


anti theft engaged, or weak fuel pump. Check fuel pressure, Just becaus it runs, Doesnt mean its not bad, 45 psi minimum to run

Jun 14, 2010 | 2000 GMC Jimmy

1 Answer

2000 jimmy intermitant problem


next time it dies check for spark, they have bad contorl modules, when they get hot they die,i would start there,also when you replaced the fuel pump did you replace the wire harness plug to pump? the was another problem was the connector melting and looses contact, hope this helps.

Dec 26, 2009 | 2000 GMC Jimmy

1 Answer

2000 jimmy will crank but wont start, fuel put is


Then it is the fuel pump. Can you hear the fuel pump come on if not that is what it is. That is why when you put fuel in the intake it started. Good Luck.

Nov 10, 2009 | 2000 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...


the fuel pressure if leaking could cause this the regulator is located under the intake plenum but you should smell gas .if you dont then most likely the pump is bad ,the pump will come on for 2 seconds when the key is on then go off it will not stay on with just the key on only when you crank it will it .so have your fuel pressure checked with a gauge.

Mar 22, 2009 | 2000 GMC Jimmy

1 Answer

Regarding 2000 gmc jimmy 4x4


Its your fuel pump,, mine did the same thing,,

Jan 16, 2009 | 2000 GMC Jimmy

Not finding what you are looking for?
1999 GMC Jimmy Logo

769 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts

yadayada
yadayada

Level 3 Expert

61168 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21949 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6812 Answers

Are you a GMC Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...