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No spark condition. Confused.

Tiny
PHATE1606
  • MEMBER
  • 1996 CHEVROLET MONTE CARLO
  • 120,000 MILES
I have compression, fuel, but no spark. On a 1996 monte carlo Z34, 3.4 motor. I have 12 volts on the 2 prong connector ground and a 11.97 volts on the 2 prong connector when key is "on". I have the correct ohms on the crank sensor, and it fluxuates between.3 and.9 AC Volts when cranked. Have 12V on ECM connector as well. Changed ignition module and coils 5 times, and tried the module from my running grand-am. Still NO SPARK! Bad ground or ECM?
(BTW just changed the motor, and put new negative battery wire.)
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Thursday, May 31st, 2012 AT 5:11 AM

4 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Go to this walk thru link: https://www.2carpros.com/articles/car-cranks-but-wont-start
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Thursday, May 31st, 2012 AT 5:52 AM
Tiny
PHATE1606
  • MEMBER
  • 14 POSTS
Ok, I have 1 code.P1652, but thats all. Tells me "power chassis pitch output circuit". Not to sure what that is. Any clue?
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Thursday, May 31st, 2012 AT 6:10 AM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
That code applies to the cooling fans 2 and 3 control circuit-
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Thursday, May 31st, 2012 AT 6:24 AM
Tiny
PHATE1606
  • MEMBER
  • 14 POSTS
Ok, would that cause a vehicle "no spark" condition at coils? I have cleared the code and tried to start the vehicle, same code re-appears with p1642 "vehicle speed output". Cleared codes and the same codes come back. Just confuses me even more.
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Thursday, May 31st, 2012 AT 6:46 AM

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