no spark

1991 CHEVROLET LUMINA
186,000 MILES • 4 CYL • 2WD • AUTOMATIC
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JAKE 2
  • MEMBER
  • 2 POSTS
no spark?91 chevy lumina 3.1 litre.replaced control module and crank sensor. have injector pulse as well as fuel to the rail.no security feature known.timing chain not broke.tested all coil packs before new module.no spark
Jan 4, 2011 at 5:14 PM
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ERNEST CLARK
  • ✓Experienced Mechanic
  • 1,730 POSTS
How did you test the coil packs? Did you check for voltage at coil connector, as well as for a signal to fire? Also keep in mind, the computer needs to see a signal from both the CKP and CMP before it'll tell the coils to fire.
Feb 25, 2011 at 6:23 AM
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