Listen, when all the gauges peg and then return to normal, it can be caused by a couple things. I have to ask you this, is the battery still strong in the vehicle or is it getting weak? I have experienced issues where a weak battery has sent the PCM into a self check and the gauges have done what you described. Truly, there are no wires going to the PM that would cause this problem. Let me know.
As far as the comments by CJ, he is a good tech. I think he was just trying to have some fun and make you laugh. Sorry if it bothered you.
Let me know about the battery.
Monday, December 24th, 2012 AT 4:19 AM