1994 GMC Jimmy Logo

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Anonymous Posted on Jun 13, 2014

94 GMC JIMMY 4.3 NEW FUEL SYSTEM NO PULSE ON INJECTOR

5 Related Answers

motor1258

Mike Butler

  • 6674 Answers
  • Posted on Jan 25, 2009

SOURCE: 1986 gmc jimmy fuel filter location

Check by lower rad hose in engine compartment, in fuel line.

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Anonymous

  • 2050 Answers
  • Posted on Sep 03, 2009

SOURCE: Fuel injectors not getting power (1990 GMC Jimmy 4.3L)

Computer maybe, but it's not the most common failure. There is a hall switch and a "pole piece" on the shaft of the distributor just under the rotor. The ignition module just to the side of them usually affects spark. Sometimes it's easier to swap the distributor assembly if you know the procedure.

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Kelly Garvey

  • 230 Answers
  • Posted on Sep 18, 2009

SOURCE: 1990 gmc 6500 topkick with no spark or injector pulse

You are jumping to conclusions. Slow down.
No spark AND no injector pulse indicates none of the desired outputs were triggered. The ignition module makes spark when it receives a crankshaft position sensor signal, and then transfers control of that spark to the computer after it starts. The module takes its crank sensor signal and generates an RPM count that it forwards to the PCM(main computer) which is used for triggering the injectors and controlling timing. SO, if you had a bad crank sensor OR a bad ignition module, you could lose both spark AND fuel. a coil would not disable injector pulse. modules RARELY fail in a manner that disables RPM reference to the computer causing it to not fire the injectors...At this point, I would TEST the crank sensor as the next step. If its easier, 1 of the wires on the module goes directly there so you can test the crank sensor at the module.

Testimonial: "great info, thanks!"

Anonymous

  • 548 Answers
  • Posted on Sep 24, 2009

SOURCE: the starter is locked up on my 94 jimmy gmc. how

sometimes just by banging it with a hammer itwhile startuing it may unlock, but usually a locked starter means that you need to shim the starter so that it turns evenly to the flywheel

Anonymous

  • 468 Answers
  • Posted on Dec 01, 2009

SOURCE: 1999 gmc jimmy w 4.3 v6. cannot find oil filter

look under the front of your blazer, just below the bumper, and you will see a little access door in the plastic guard. Open this door, and you will find your oil filter.

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89 GMC S15 Jimmy getting fuel to the throttle body but not through it

The pick up coil and module need to be replaced in the distributor.This is where your injectors get there pulse.
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You need to do a OBD1 fault code test and see if any codes are in memory first of all. Learn how to do that without any special tool at the link.

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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.
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1991 4.3L GMC Jimmy S-15 will not start. Turns over, but does not start. Replace spark plugs and wires, ignition coil, module checked good. The plugs are gettin fire but not sending it to the motor?

You need 3 things.
Compression
Good hot blue spark to all plugs.
Good gasoline and proper fuel pressure. 13-13.5 lbs on your TBI
If you have all 3 then move on to injector pulse to both injectors.

Keep me posted and recheck your spark plug wire to make sure they are not crossed. firing order 1-2-3-4-5-6 cylinder # passenger side 1-3-5 front to back. cylinder # drivers side 2-4-6 front to back
distributor #1 is located at the 7 o"clock and rotates clock wise so next distributor post on the right working clock wise is #2. Good luck and hope this helps.
2helpful
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I have a 1995 gmc jimmy 4x4 i check fuel pressure an the voltage

a simple 12vdc will not due, it needs a pulse signal from the computer. a full 12vdc could fry the injectors, but the spider assemblys in them v6's are always a @$!$@ up design. i have encountered alot of them with bad pcm, or the spider.
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94 gmc jimmy will not start

You have to determine a few things. Are you getting spark at the plugs? Are you getting fuel to the injectors? You can also read the engine codes to see what codes are stored in there.
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Hard start when cold/first start in morning

The pressure relief valve is in the spider fuel injector not the fuel pump. We have had our 94 gmc jimmy for 4 years & have had to replace the fuel injector 4 times which cost right at $500 each time for the part. Yes the spider fuel injector cost averages around $500.
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