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Ignition control switch and it still wont start?

Tiny
TRUCKRACER32
  • MEMBER
  • 1997 CHEVROLET TAHOE
  • 5.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 160,120 MILES
I rebuilt the heads, full gaskets, starter, water pump, distributor, cap and rotor, spark plugs and wires, idle air valve, MAP sensor, ignition control switch and it still wont start. It sat for three months before I did any work on it but, I would start it to move it for street sweeping every week. The fuel pressure is 60 psi. Need help before taking it to the dealer!
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Monday, October 10th, 2016 AT 6:58 PM

2 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
It sounds like you have an ignition module or a crankshaft sensor that has gone out, I would replace them both if one is bad because one can make the other go out. Use your volt meter and see if there is pulse at the sensor. Also it looks like you have two crankshaft sensors one down at the crankshaft and one in the distributor.

Here is some wiring diagrams to get you started.

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Let me know what you find.
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Saturday, June 5th, 2021 AT 2:48 PM
Tiny
TRUCKRACER32
  • MEMBER
  • 6 POSTS
Thanks, I replaced the crank sensor it fired right up.
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Saturday, June 5th, 2021 AT 2:48 PM

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