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Posted on Oct 27, 2008

2000 GMC Jimmy will not start

Fuel pressure regulator changed, ecm changed, fuel pump working, fuses checked. Truck engine will try to turn over, sometimes it will start, but only after trying several times, mostly it won't start. Could problem be in the ignition switch? Please help, very frustrated!

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  • Anonymous Nov 05, 2008

    My 2001 Jimmy had been running well for the last 4 months after I had replaced the fuel pump and filter for the second time. Now just recently, I noticed it was not starting on the first turn but immediatley on the second. The problem went from that to not starting at all in the morning hours. When I give it a crank it wants to start but after several tries it will not. If I prime it will start just fine but only as long as it stays running. It couldn't be the fuel pump this was just replaced not too long ago, right? I've had this vehicle for 3 years now and it's had consistant problems from the start. At this point I don't know where to turn for a solution. I heard that a faulty oil pressure switch will cause the fuel pump not to work properly but that's just what I read. Too much money has been spent trying to maintain this lemon and I am very frustrated. Any solutions or ideas?

  • Anonymous Dec 19, 2008

    new fuel pump,filter,tank,and screen.presure at check point but will not put fuel in engine.where do i go next?

  • Anonymous Dec 30, 2008

    My 2000 GMC Jimmy Won't start unless I pour a little gas into the throttle body then it runs fine

  • klavuhn Jan 01, 2009

    I have 2000 gmc jimmy 4 dr 4.3 my suv is doing the same thing it funs sometimes and will not fire others. it will sit there and turn over but will not start. after i let it sit for several hrs i go back to it and it mostly starts with no problem. other times im driving along and it starts to sputter. i get gas from several different gas co. and i use fuel aditives. but once again my suv will not start. i waited the usual several hrs and no change. i have only had this suv for 10 mths and im feed up with this fireing problem. what is it fuel pump fuel filter plugs injecters what? all of my fuses under the hood r good not sure of any other fuses or cylinoids im lost and cant aford a garage some one pls help

  • Anonymous Mar 15, 2014

    failed cold starts

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Mark Nestor

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  • Posted on Nov 30, 2013
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2000 jimmy I have im having trouble starting sometimes in the morning it cranks right up and dies later on in the day after it sits it fires right up could it be the ecm going bad

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  • Posted on Nov 29, 2008
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The oil presure switch does have some bearing on the problem but my suggestion is to change the coil. I had a the same problem with an astro van. I changed everything that you have described and it fixed the problem just for a little while and then all of a sudden did it again. I changed the coild and the cold start swithch and never had the problem again.

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Related Questions:

0helpful
1answer

Getting fuel everywhere except fuel injectors

You really need a garage to diagnose why. You may have insufficient fuel pressure, or the injectors may be blocked if you have been running the tank low.

But first, check this fuse in the Engine Bay
ECM ICiN PCM/VCM Ignition, Injectors, Crank Sensor, Coil Driver Module

https://fuse-box.info/gmc/gmc-jimmy-1995-2001-fuses-and-relays

Low fuel pressure is mentioned here

https://www.google.com/search?q=96+gmc+jimmy+won%27t+start

Good luck with the move Tammy
..
0helpful
2answers

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.
1helpful
1answer

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.
0helpful
1answer

1993 GMC Jimmy won't throttle up..changed fuel pump...sounds like fuel is running back into tank

Check fuel pressure regulator.Start engine hook fuel gauge to fuel line check pressure ready then pull the vacuum hose of the fuel regulator if pressure rises 5-10 psi then its good.
3helpful
2answers

Have a 98 gmc 5.7 truck have to prime to start truck.

Sounds to me like either your pressure regulator is bad or you have a loose fitting somewhere in the fuel line from the fuel pump to the engine. When you turn your key to the on position, you should hear the whine of the fuel pump until it builds pressure. When you shut the truck off the pressure regulator should retain the pressure for a certain amount of time but if it don't close then air is allowed into the fuel line and the fuel drains down to fuel line away from the engine. Next time you try and start the truck after it has sat for a while try turning the key on until you hear the fuel pump whine shut off, then repeat it 3-5 times and then try to start it. Basically that is running the pump enough to get the fuel back up to the injectors. Check for loose fittings in the fuel line, or cracks in the fuel line and if all that is fine then replace the regulator.

Hope that helps
0helpful
2answers

Engine turn over but won"t start no fuel no fuel pressure, how to run test with out removeing the tank?

first thing check fuel filter. it sets along the frame. Did you check the fuel pump fuse? Make sure there is power going to the pump.
0helpful
2answers

2000 Jimmy running one second and just won't start the next. Will crank but no fire. Changed fuel filter and while doing so turned key and swa fuel pump working.

If no check engine light is on, I would check the ign-distributor cap and rotor, also check the crank and crank sensor. There is also a ign-mod located in the distributor assembly under the rotor. They will fail when hot.
7helpful
3answers

2000 GMC Jimmy won't start

i had the same problem and replaced the fuel pressure regulator. Cost about $45 at advance auto store or about $90 at napa auto stores. Once i replace that my truck started right yup and runs like a champ
1helpful
1answer

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.
1helpful
1answer

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.
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