Question about 1992 GMC Jimmy

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I have a 1992 GMC Jimmy CPI. well it dumps alot of fuel and runs like **** from idle till about 2500 rpm. there is always gas in the oil after a while also. ive given it a tune up and everything. it has to be something electronical i believe. im going through like 100 bucks in fuel a week just driving around in town.

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Is this the Vortec engine? If so, the fuel injector spider, has a built in pressure regulator and i would say it is spraying way too much fuel into the cylinders. At the same time is is washing your cylinders of lubrication, and that itself is not good.

Posted on Feb 01, 2010

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I have replaced my fuel pump, filter, throttle position sensor, and relay on my 1992 jimmy. it runs but everytime it hits idle speed it cuts off. what could that be


It should have an idle air control valve which lets air into the intake to control the idle speed. The valve could be faulty, or dirty, or the throttle body could be dirty. The computer opens and closes the valve to regulate idle speed.

Jul 16, 2012 | 1992 GMC Jimmy

2 Answers

My 94 GMC Jimmy 4x4 vortec, is hard to start, cuts off when i make stops, have to put it in neutral when i am at lights and still have to give it gas then. already changed the distributor cap and rotor...


I recently had similar symptoms from my Kia Rio, hard to start, bad idle in gear, etc.
Ended up being the idle air control valve, you can try cleaning yours with carb cleaner and see if there's any difference.
A clogged fuel filter can produce the same symptoms too, that might be the easiest thing to start with, then it's just a process of elimination from there.

Sep 02, 2011 | 1994 GMC Jimmy

1 Answer

94 jimmy.. have replaced almost everything.. smells like gas inside..all gas lines replaced..was running alot better then couldn't get it started almost like it flooded..starter fine..replacedall fuel...


i have a 1994 gmc jimmy 4.3l cpi. i could not pass the emission test.hard to start, spuddered, and smell of gas was strong. long story short, i replaced my spider injectors, good to go. $278 brand new from auto zone.

Jul 31, 2011 | 1994 GMC Jimmy

1 Answer

1992 gmc Jimmy won't start without spraying


check the fuel filter first , then the fuel pump

Jul 15, 2011 | 1992 GMC Jimmy

2 Answers

I have a 1995 Jimmy and I have gas in the oil


I take it you're doing an oil change and made this discovery? Some gas is normal, especially after winter months (high idle/choke) Could be sticky injectors - run a good fuel system cleaner through it, clean MAF and oil change/filter and check after about 2-300 miles. If there's alot of fuel, then you might consider changing injectors

Mar 21, 2011 | 1995 GMC Jimmy

2 Answers

4.3 cpi rough idle ,pops on acceleration to


did you check for vacoum leaks?

Sep 26, 2009 | 1994 GMC Jimmy

1 Answer

1994 GMC Jimmy hard to start and runs rough when first started


i think if you checked the sparking plugs and map sensors then check your distributer its maybe not delivering the current nedded to perform the spark to some of the cylinders

May 30, 2009 | 1994 GMC Jimmy

1 Answer

2000 gmc Jimmy misfiring


change fuel filter ,have inject. system cleaned

Mar 11, 2009 | 2000 GMC Jimmy

1 Answer

1994 GMC Jimmy hard to start and runs rough when first started


did you do a fuel pressure test? if you havent do it its cheep an at least you can elimanate that. if thats not an issue, then there is only two other things crank sensor, and if there is one cam sensor.

Feb 02, 2009 | 1994 GMC Jimmy

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