No spark when warm

Tiny
REDOXJOHN
  • MEMBER
  • 1999 PONTIAC MONTANA
  • 3.4L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 18,000 MILES
When warm there is no signal at ignition control
at the ICM. ICM is new.
Signal is there when engine is cold and it does starts.
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Monday, July 30th, 2018 AT 3:44 PM

1 Reply

Tiny
ASEMASTER6371
  • EXPERT
Good afternoon.

The signal comes from the crank sensor.

When it does not start, does the tachometer move up while cranking?

Check the harness at the crank sensor.

Roy
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Monday, July 30th, 2018 AT 4:18 PM

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