Super strange behavior during jump start........

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shibbershabber

I'm Awesome
Joined
Jun 1, 2012
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Location
Vancouver, WA
Giving a jump and when everything was connected and ready...

the other guy goes to start his car, when he is cranking his engine, my truck starts to rev by istelf into the 2-3k range.

As soon as he is finished cranking, my idle goes back down simultaneously.

This was repeated twice with the same result. The final time the truck was near red lining.


This is in a 1994 6.5 TD


Any thoughts?
Ground issue?
 
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