Question about 1990 GMC Sierra

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90 gmc sierra no start

All ready change cap/rotor,coil and now the igniton module. first changed cap and rotor ran fine next day ran good then just died wouldn't start changed igniton coil started right up tried it 3-4 times started every time went out later and it didn't start so changed ignition module. Have not changed pick up coil on ditributor as of yet. what else could be the problem

Posted by on

  • hummerbug Apr 15, 2009

    the new coil was put on the same way the old one was taken off and it ran fine after it was put on ran it for about half hour. the wires are fairly new

  • hummerbug Apr 16, 2009

    I have now replaced the wires and still no start. would the pick up coil cause the the ignition module to fail as well as the coil couse that is the only thing that has not been changed

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Did you use the dylectric grease that should have came with the ignition module?
the module can be ruined by excessive heat, the grease is to insulate the module from too much heat.
also check for lose connections.
hope this is helpfull

Posted on Oct 27, 2011

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  • Master
  • 3,113 Answers

Try another coil and mount it correctly. Check wires for power.

Posted on Apr 15, 2009

  • honeymokey
    honeymokey Apr 15, 2009

    Try a delco coil. Check the wires that power the coil.

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