Question about 1993 GMC Jimmy

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Car won't fire

I have a 1993 gmc jimmy with 4.3 vortec i have spark and fuel but it won't fire. i checked codes but there aren't any timing seems fine

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  • Marvin
    Marvin May 11, 2010

    is fuel bre injected? what is the actual fuel pressure?

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  • Master
  • 1,985 Answers

If you have checked for spark at the spark plug end of the wire and it was not an sporadic,then you need to check the fuel pressure at the fuel rail reed valve,it should be at least 50psi ti start an engine thru the injectors

Posted on Dec 11, 2009

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Related Questions:

1 Answer

96 Jimmy 4.3 eng what is the fuel pressure , key on, not running


the vortecs are really picky about fuel pressure. if i recall right i think 60psi is the magic number

Mar 13, 2012 | 1996 GMC Jimmy

1 Answer

I have a 1997 GMC Jimmy with a 4.3L Vortec V6. It will turn over but won't start. It's getting fire and fuel. All the dash lights come on when the ignition is turned on and you can hear the fuel...


On the vortec engines they require 56 pounds of fuel pressure to start a few pounds shy of that you have a dead vortec you will need a fuel pressure guage to verify

Nov 30, 2011 | 1997 GMC Jimmy

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My jimmy wont start have 58 psi of fuel pressure good spark but the spider injection wont open to spary the fuel brand new 280 bucks for it have checked grounds two broken one fixed those still no start...


check your ecm-ign fuse.if it is ok check to see if you have power to your spider injector.if you have power, you either have a bad computer or a bad connection between the computer and the inj.do you have spark??.if you have no spark check your ign module or bad connection at the ign module.i have seen that before.

Feb 01, 2011 | 1993 GMC Jimmy

2 Answers

Looking for the fireing order for my 1993 jimmy 4.3 votek moter


Here is the firing order for that vehicle and engine, however, some people can not figure it out (color coding and numbers seem to be too complicated for some) and have given low ratings for this diagram, and I will probably stop giving out this firing order. Let me know if you need help to understand this diagram, or require any further assistance.



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Aug 05, 2010 | 1993 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

1 Answer

My 1996 Gmc K2500 with a 7.4l is miss firing. runs good till it warms up, then the problem starts. I have no codes in the computer. new fuel filter, spark plugs, air filter


Very good chance that it's bad fuel injectors and/or fuel pressure regulator. Very common with the 96-2000 L29 motor (Vortec 7.4L)
Replace with better injectors, the OEM ones are NOT WORTH cleaning. Go to http://www.fullsizechevy.com/forums/general-discussion/technical-maintenance/213662-96-99-454-vortec-owners.html
for more info...

Sep 05, 2009 | 1996 GMC Jimmy

2 Answers

Mixed up fireing order on a 1993 gmc jimmy


Please don't forget to rate!!!

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Aug 26, 2009 | 1993 GMC Jimmy

1 Answer

Rough idle(rich) stalls in gear


Basically clean up before use like opening the plugs and adjusting the spark gaps, spray some carb cleaner at the intake & if The soud of the engine smoothens even slightly, then add some it to the fuel in the fuel filter & gun the engine a few time. Flush the radiator and fill in frsh coolant/water. Check the level of water in the battery and top up with distilled water. Clean the air filter and check fan belt tightness. After these small maintenace checks it should run OK.......sodeep

Aug 07, 2009 | 1993 GMC Jimmy

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