Misfiring on two cylinders

Tiny
TROD38
  • MEMBER
  • 1989 CHEVROLET CHEYENNE
  • 5.0L
  • V8
  • 2WD
  • MANUAL
  • 2,000,000 MILES
If I unplug the electronic spark control, is the engine suppose to die and could a bad ESC cause two cylinders to not fire and make the engine miss?
Sunday, August 28th, 2016 AT 9:02 PM

1 Reply

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Try pulling one plug wire at a time to try to find cylinders that are missing then check plug wire for resistance, spark plug and compression. Also check for a vacuum leak under TBI unit. They blow gaskets there. Yes if you unplug ESC the engine will quit. It may be a distributor cap or low compression so check all this first.
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Monday, August 29th, 2016 AT 6:55 AM

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