!986 Coupe Electrical issue

[mmidge]

My 1986 Coupe has developed an electrical issue that has been difficult to diagnose. When it gets to operating temperature Coolant 200 deg. and Oil temp 200 deg. the dash begins to flicker and engine begins to stumble. This only happens once it warms up. I have checked the grounds and they seem to be okay. Any other suggestions?

 

[mmidge]

Problem Solved!!!!

Problem solved!!!! Upon recommendation of a knowledgeable person I changed out the Ignition Control Module and the Ignition Coil. Although this remedy was not listed in the Shop Manual it proved to be the cure.

 

[gmjunkie]

Problem solved!!!! Upon recommendation of a knowledgeable person I changed out the Ignition Control Module and the Ignition Coil. Although this remedy was not listed in the Shop Manual it proved to be the cure.

Purdy common issue on older GM cars and trucks with HEI!