Join Date: Jun 2002
Location: USA & Singapore
Ferrari Life Posts: 5,509
Sounds like a slightly loose or dirty connection. They will work fine until they heat up, the resistance increases so the device stops working, then it cools, the resistance lowers and the device works fine. I really have no advice on how to track it down until it stops working completely. The problem is that the resistance of the connection lowers as it cools, so while you are trying to track it down it fixes itself.
It took me a year to track down a faulty ignition connection on my Jeep. I had gone through everything twice! The Jeep would stall and not restart, seemingly random, wait 10 minutes and it's fine. When it finally stopped working altogether I was able to locate the bad connector, replace it and I haven't had a problem since.
'79 308 GTS, '82 Jeep CJ7 Jamboree
"Time is what prevents everything from happening all at once."