Chevrolet Q&A

Ask Your Question

1990 Chevrolet 1500 Pickup Question: What would cause random voltage spikes to around 17 volts?



, 4.3L V6, Albany, NY, August 11, 2010, 07:30

I am getting about a 17v voltage spike during the first 10-15 minutes after start up. They will hold for a few minutes then drop, and return again. After the engine warms up, they seem to go away.

Any thoughts as to the cause?

2 Answers
Flag This
  • Answer #1

    August 11, 2010, 07:55

    alternator. repair it before it damages your computer


    Flag This
  • Reply

    , August 11, 2010, 08:37

    Thanks! I was thinking this or voltage regulator...

    Flag This
  • Answer #2

    December 15, 2010, 22:58

    take your alt in to a auto parts store to be checked if its good then it could be your voltage regulator

    Flag This