Question about GMC Jimmy

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1993 jimmy 4.3 liter wont prime the injectors before statring....if i spray carb cleaner into the intake, it will start and run fine.

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  • littletroll2 Feb 25, 2009

    smae thing with mine i can drive it and stop shut it off turns it on it will fire up but if i let it sit a min it won't fire back up

  • nick83 Mar 22, 2009

    Try changing the fuse for your fuel pump this went wrong with mine 99 gmc jimmy and thats all it was.

  • insitesvc Mar 30, 2009

    I have the exact same problem. You can hear the fuel pump when starting - (although it seems like only 2 to 3 seconds each time I turn the key), had the fuel pressure checked and it was 54 psi, replaced fuel filter, and replaced starter and battery. After sitting for hours I just spray less than a quater ounce of fuel down the throttle body, put the aire filer assembly back on, and turn the key and it immediatly starts and runs pefectly??

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Check the ignition module (located in distributor, under cap). These modules not only control ignition firing but also send a signal to pcm to control fuel injectors. They can become heat sensitive and fail intermittently. Most auto parts stores can check these modules if you remove and take them in.

Posted on Apr 03, 2009

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I would first change the fuel filter could be clogged over time.
When you first turn the key in the ignition switch. Listen for the fuel pump in the tank should be turning on. You may have to get under the car and listen to the fuel pump coming on when some one else turns the key. The fuel pump should turn on a few seconds before trying to start. IF the fuel pump is coming on. The fuel pump itself is not holding the pressure anymore after sitting a while.
I would take to a local shop to check it out if the fuel filter does not work.

Posted on Feb 01, 2009

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LOSE PRIME OVER NIGHT OR SET WITH ENGINE RUNNING . BUT LITTLE THE IN TAKE IT START RIGHT UP . IT 1993 JIMMY VOXTEX 4.3


sounds like fuel pump check valve stuck if you just cycle the key on 8 sec off 10 sec a few times it will start without spraying intake unfortunately they at times will loosen by them selves but not all the time try a fuel cleaner in the gas tank if that dont work you can live with it or replace check valve or pump

Aug 17, 2013 | 1994 Chevrolet S-10 Blazer

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1998 gmc jimmy,about a month ago,I changed plugs wires cap and rotor and now it is runnniun ruff,mising out on acceleration shakes @ 2000 rpm.ran good for a month.


If a random multiple misfire code appears , and electrical system checks out Ok, need to do a fuel pressure test at the fuel rail (Drivers side) if checks out ok, it very well can be sticky fuel injectors.If injectors leak by can cause to much fuel dispursed into engine, sometimes a bottle of lucas fuel injector cleaner will do the trick, opens up the poppets (injectors) although the (Spider Injector) has an electrical pulse that is supplied from the ECM (computer.) The spider injectors definitely go bad some sooner than others! Not a pleasant job also an expensive job if u are not doing it yourself! If your vehicle was fine before this started happening go back over everthing u have done, check each wire out with a noid to see if spark is correct ( A noid plugs into end of the wire that goes onto the sparkplug, check each wire one at a time, u can purchase a noid for this vehicle at your local autoparts store) Not saying this is definitely the problem, there are many things that cause these problems,crank sensor, cam sensor, tps mass air flow map sensor intake leaks and vacuum leaks etc etc,u can check for leaks by spraying down intake and vacuum lines with a can of carb cleaner, look for a change in the idle when u are spraying it down How do we know? been thru it all to often! GOOD LUCK! 1998 GMC Jimmy 4.3 Liter Vortec V- 6.

May 05, 2011 | 1998 GMC Jimmy

1 Answer

93 gmc jimmy wont start turns over and theres spark but it wont fire. fuel pump sounds like its priming


spray ether into intake , if it wants to run then you have a fuel problem. if you can rent a timing light, check the timing, it could have jumped, and it will still have spark. also check the plugs for proper gap.

Jun 21, 2010 | 1993 GMC Jimmy

3 Answers

We have a 1991 gmc jimmy we want to know what would cause the fuel enjectors to not fire on cold start. but we prime the motor with a little gas the motor will start and the injector will start spraying...


It sounds like an air lock or a fuel pump issue. firstly get the filter changed and bled through this might help. if the problem persists check the pump.

Regards

Dan

Jan 31, 2010 | 1991 GMC S-15 Jimmy

2 Answers

95 jimmy wont start


check the crank sensor and the injectors also check all wiring especially that one for shorts or looseness

Sep 24, 2009 | 1995 GMC Jimmy

1 Answer

Old j reg mercedes 230te wont start


Check Injectors spraying Fuel when you start. Fuel pump prime because you hear the pump. IF pump is weak, then your Fuel distributor doesn't have correct pressure to spray fuel when injectors open. Do your sparks plug wet after trying several times. If they are dry then you don't have fuel. Replace injectors If they are wet then you don't have correct air:gas ratio of 14.6:1. Replace Fuel distributors

Aug 10, 2009 | 1993 Mercedes-Benz Mercedes Benz 300 Class

2 Answers

1993 geo tracker engine idels high all the time


you need to post
8vlave
or 16valve motor

they can be either.

but there are 50 things that can kill idle.
air leaks
ISC valve stuck
ignition timing too far advanced a idle.
and many more
tell more , get more.

Feb 18, 2009 | 1993 Geo Tracker

2 Answers

Jeep will start but not idle when it's cold out


You have a cold start injector. It basically primes the fuel into the engine.
It`s like the old type `choke` systems.
Get it checked at an auto electricians.

Jan 26, 2009 | 2001 Jeep Cherokee

1 Answer

2001 Nissan Altima with service engine light on


I would check your intake gasket. Get your self ome carb cleaner in a spray form/can and perfrom this test. Run the car and spray the carb cleaner on your intake gasket which is right by your injectors. So pretty nuch spray it at the injector rail and listen fot change in idle, If the idle changes, the intake gasket is torn and you are running lean, because of a vaccum leak. Common problem on your model car. Perform test and let me know what you find.

Jan 12, 2009 | 2003 Nissan Altima

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