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1990 Buick Skylark No spark

Tiny
JOE MEDEIROS
  • MEMBER
  • 1990 BUICK SKYLARK
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 67,000 MILES
I hope someone can help me I lost for answers, the car is mot getting any spark. I have replaced the crank sensor, Checked fuses (ECM) I also took the Electrical Control Module to Auto zone and had it tested and it tested good 4 times. This past weekend I replaced the cars computer thinking that would fix my problem of not spark? Checked wiring for small critters None to be found.

Fuses - check
New Crank sensor -Check
ECM tested - Check
New Computer- Check
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Monday, December 7th, 2009 AT 10:21 AM

1 Reply

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Welcome to the forum. Did you check for trouble codes or do any circuit testing, before replacing anything? Did you check for voltage at the ignition module, key on, pink wire should be hot, use a testlite. Engine cranking, it is the ignition module that controls spark. The ignition module needs signal from combination crank sensor. Lite blue wire with white tracer is ref voltage to the combination sensor. Dark blue wire with white tracer is ground. The other two wires at the combination sensor, there should be a pulse on those wires with engine cranking.
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Monday, December 7th, 2009 AT 11:26 AM

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