ever heard of this?

when car starts every thing is running good when turn on heat the motor sort of runs ruf when i am at a stop light shut heat off the motor runs fine.any ideas?

Reply to
zeus
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Test your battery first:

Then set a DVOM to AC and check at the battery posts for AC voltage, anything over .01V means a diode in the alternator is going bad.

Reply to
Refinish King

Reply to
zeus

Bad ground?

Reply to
Scott Buchanan

Reply to
zeus

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