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Engine will not start, no spark

Tiny
BUBBACOOPE
  • MEMBER
  • 1991 CHEVROLET SUBURBAN
  • 5.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 11,000 MILES
Replaced coil ran fine start stop restarted all day. Next morning wouldn't start no spark. Replaced coil again started fine next morning same issue! No clue what's happening. Any thoughts?
Tuesday, September 3rd, 2019 AT 6:48 AM

5 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning,

Sounds like the module is bad and also failing the coil as well.

This time, change the module in the distributor and the module at the same time.

The module is demanding max coil output. Most could not take that for a long time.

Roy
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Wednesday, September 4th, 2019 AT 5:25 AM
Tiny
BUBBACOOPE
  • MEMBER
  • 3 POSTS
Did just that and stated right but now idle is a little rough in gear?
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Wednesday, September 4th, 2019 AT 12:03 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Okay, drive it for a little bit and see if it straightens out and keeps running. Stay close in case it shuts off.

https://www.2carpros.com/articles/engine-surges

Roy
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Wednesday, September 4th, 2019 AT 12:12 PM
Tiny
BUBBACOOPE
  • MEMBER
  • 3 POSTS
Started right up this morning still idling rough.
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Wednesday, September 4th, 2019 AT 4:43 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
That is a different issue from the no spark issue.

Check the plugs, wires and look for any vacuum leaks.

Roy
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Wednesday, September 4th, 2019 AT 4:54 PM

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