I am working on a 1982 Targa 911. Took it down the road for a test drive after replacing the fuel injector seals and the Tach and Radio started doing strange things. The Tack needle jumped up to 8K RPM and kinda bounced around while cruising at 60MPH in 5th gear. At the same time the Radio started loosing electrical power and would go on and shut off. I wouldn't think the radio and tach are electrically related in anyway, but when this problem occurs both instruments start doing these unusual things.
Any suggestions?
Thanks,
Keith
