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Turns over but will not fire

Tiny
JASON GORES
  • MEMBER
  • 1997 GMC SAFARI
  • 4.3L
  • AUTOMATIC
  • 190,508 MILES
Replaced lower intake manifold, had to cut wires to get to the lower manifold and now it won't fire. Replaced starter battery and half of my gauges don't work.
Wednesday, November 25th, 2020 AT 7:27 PM

2 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,708 POSTS
Hi,

What wires were cut? Have you repaired them? Also, is there any indication the engine is trying to start? Will it start for a couple of seconds using starting fluid?

I need to know what was cut and how it was repaired. If possible, take a few pics of what was done so I can see it. Also, if you can record it cranking so I can hear it, it may help me.

Take care,
Joe
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Wednesday, November 25th, 2020 AT 8:03 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,708 POSTS
Hi,

Here are the wiring schematics for the engine and starter system. Hopefully, they will help guide you. Additionally, here is a link that explains how to check the wiring:

https://www.2carpros.com/articles/how-to-check-wiring

Pic 1 is the starting system and the remaining pics are the powertrain management schematics.

Let me know if this helps or if you have other questions.

Take care,
Joe
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Thursday, November 26th, 2020 AT 3:38 PM

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