4.3L won't start


Old 09-11-05, 03:44 PM
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Question 4.3L won't start

I have a 1993 Jimmy with a 4.3L Vortec engine. The fuel pump went bad. I replaced the fuel pump but the jimmy still does not want to start. I also replaced the fuel filter. I have gas all the way up to the Multi port fuel injection Assy. but still won't fire. If I spray fuel in throtle body it will fire so I have spark. I replaced the intire Multi port fuel injection assy and still no luck. The error code pointed to the throtle position sensor so I replaced that and still nothing. All the fuses ( that I can find ) are good. I have 11.8 volts at the injection assy when key is turned on. Any ideas on what I'm missing?
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Old 09-13-05, 05:22 AM
Join Date: Dec 2001
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check fuel pressure if it has less than 55psi key on engine off then you still have a fuel pump related problem.
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