Question about 1998 GMC Jimmy

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98 gmc jimmy will not start unless you put gas in the intake. then will run and start great untill shut off for a few hours. the loses prime? please help

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Remove intake manifold and change pressure regulator/spyder assy

Posted on May 07, 2010

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1 Answer

2001 gmc jimmy wont stay started


check the fuel pump relay, some gm vehicles default to the oil pressure switch if the FPR fails.

Mar 17, 2013 | 2001 GMC Jimmy

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1992 gmc jimmy 4.3 vortec hard to start


Bad fuel pressure regulator under the intake manifold
& possibly a fuel pump loosing pressure also

Nov 24, 2012 | 2001 GMC Jimmy

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Have a 96 Jimmy. Sometimes it runs and other it will not start. If i put gas in motor directly it will start and stay running. Runs fine for a few starts bit after it sits over night it will not start...


Your carb has a very small pinhole that lets the fuel in the float section drain out. You may have to replace the carb. Good luck with that.

Dec 17, 2017 | 1996 GMC Jimmy

1 Answer

98 gmc jimmy only start when primed at the throttle body then runs fine until shut off then needs to be primed again to start


This happened to me I had to spray Starting fluid everytime eventually. Starting fluid wouldn't work after awhile. Its the fuel pump. Even though it comes on and works its not producing enough fuel pressure to start the engine. It's probably giving about 12-13lbs of pressure but it needs atleast 14lbs. of pressure. And a word of advice to buy a ACDelco original fuel pump if you don't want to have to replace it again in 1-2 years, it's more expensive but will last.

Oct 01, 2011 | 1998 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

2 Answers

1997 jimmy 4.3 liter hard start. Have to prime throttle body when


could be your battery is getting old they tend to lose performance in colder weather.

Jun 24, 2009 | 1998 GMC Jimmy

4 Answers

Engine wont start without priming with gas first, then runs well


i have the same problem on a 98 jimmy 4.3 4x4.
i replaced the fule pump and have good pressure.
new wiers & coil (good spark) no MIL & no codes.
will only start when primed. it will run & drive all day
with no problems.
but once it has been turned off (warm or cold) i will
have to prime it once again to start it.
i have another engine that was in it before it spun a bearing.
it ran fine so i know all parts are good.
i swaped the mass air flow and throttle body but i still have
to prime it everytime to start it. am i forgetting something?
should i swap out the intake with the injectors?
any help would be sweet. thanks.

Apr 28, 2009 | 2000 Chevrolet Blazer

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