1995 GMC Jimmy 1995 4X4 Jimmy won't start

RAY GADD

MEMBER
1995 GMC JIMMY
6 CYL
4WD
AUTOMATIC
120,000 MILES

Problem is jimmy ran fine then everything shut down.
Well I have had the fuel tank replaced along with the fuel pump.(Had it checked it was blown) had the exhaust replaced (due to 4x4ing) I also replaced the spark plugs(they were bad), and wires along with the rotor and cap. Then it still won't start the fuel was tested for presure and there is lots of fuel to the engine(you can hear the new pumpkick in). Lots of spark! I then changed the ingition modual still nothing. I have no ideas can someone please help me to try to solve this.

6 Replies

MERLIN2021

MECHANIC
17,250 POSTS

Start with the basics, and work your way up, Last tune up was? Wires plugs ALL filters? If all that is ok, check for a stuck EGR, then test fuel pump pressure, If it won't restart, determine what's missing, the engine needs three things to run, Spark at all plugs, gas to all cylinders, and compression in all cylinders, tho an engine may run lacking one in one cylinder, it won't run very well!

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Saturday, December 22nd, 2007 AT 7:19 PM

RAY GADD

MEMBER
4 POSTS

Last tune up was done 5-6 days ago.
If you put gas into the carb it runs awesome until it burns up then it just turns over. Everytime I put it on the computer it is $80.00 it has been 3 x last diagnostic was to change the ign modual
egr the guy who had it on the computer did not think that was the problem filters are new
lots of spark gas and I assume compresson is fine cause it runs great if you manualy give it gas

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Saturday, December 22nd, 2007 AT 7:44 PM

MERLIN2021

MECHANIC
17,250 POSTS

If it runs when gas is introduced to intake, the fuel pump or pump reley is no good. Since the pump was changed test the wires to the pump, and fuse. Do you hear the pump run for 2 seconds when the key is turned to on? Take the gas cap off and listen at the tank.

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Saturday, December 22nd, 2007 AT 8:18 PM

RAY GADD

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4 POSTS

Ok the pump and relay are new $$$ was alot there is noise coming from the tank when you try to start. Gas is comming tothe engine. I do thank you for your inputand I am gratefull for your comments. Anyways we have gas lines are good filtrs are new gas is new tank pump etc. So we have gas to the engine so is the next step maybe the injectors? It is fuel injected?

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Saturday, December 22nd, 2007 AT 8:56 PM

CORDEL MICHAEL

MEMBER
1 POST

I don't have much experience with automotive engines but I do have a fair amount in small engines and I would suggest checking the govener, air/fuel mixture, or as you said in your previous reply the injectors a carb cleaning could do a good deed as well.