1993 GMC Jimmy won't start

Tiny
TUMBLEWEED
  • MEMBER
  • 1993 GMC JIMMY
Engine Mechanical problem
1993 GMC Jimmy 6 cyl Four Wheel Drive Automatic

Alright I have a 1993 gmc jimmy it has a 4.3 vortex. It won't start. I have replaced the fuel pump the filter the injector cluster the fuel pressure regulator the ignition module cap rotor plug wires plugs the computer and all the fuses. I am getting good spark and I am getting fuel all the way to the fuel injectors but that's it. I am at a total loss and need help, please.
Friday, September 12th, 2008 AT 10:07 PM

6 Replies

Tiny
OBXAUTOMEDIC
  • MECHANIC
  • 3,711 POSTS
Hello,

You say you have good spark, what color is the spark it should be bluish/white. If it is an orangish color you have a weak spark and in most cases the vehicle will not start.

Have your check the Timing? Bring the #1 cylinder to top on compression stroke, remove cap and make sure the rotor it pointing at the #1 plug tower.
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Friday, September 12th, 2008 AT 10:40 PM
Tiny
TUMBLEWEED
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First off let me thank you for helping. Yes the spark is a white color and the timing is set dead on. I am get fuel all the way to the injectors but they are not spraying. Once agian thank you for the help
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Friday, September 12th, 2008 AT 11:09 PM
Tiny
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  • MECHANIC
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Sorry, I am drawing a blank for some reason.

Does the vehicle have a security system and/or a chip set in the key and lock cylinder? If has chip in key and you have a spare have you tried the spare key?
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Friday, September 12th, 2008 AT 11:29 PM
Tiny
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No it doesn't on both, I have called every shop I could and no one can figure out why it si not running but thanks for trying
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Saturday, September 13th, 2008 AT 1:28 AM
Tiny
OBXAUTOMEDIC
  • MECHANIC
  • 3,711 POSTS
Hello,

I have asked for some additional help on the since I have drawn a total blank on this.
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Sunday, September 14th, 2008 AT 7:27 PM
Tiny
OBXAUTOMEDIC
  • MECHANIC
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Ok,

Have you checked the injector harnesses? If injector harnesses check ok. Then check the injector resistance it should be.

4.3L Vin - Z Turbo --- 2.0 ohms

All others - 1.3 ohms
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Tuesday, September 16th, 2008 AT 4:03 PM

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