Glad to hear that an avg guy can install a chip. I own an M5 Touring '93 340hp and recently bought a chip that could increase to 370 hp... Eventhough I had clear installation guideline still something went wrong. After installation the car didn't start anymore. Offcourse I reinstalled the original, and guess what it didn't start either.
I still can't find out what's wrong.
Looking at other description on www.bmwe34.net/E34main/Upgrade/Chip.htm I noticed that there is no advise in disconnecting the battery. In my guideline it was suggested to do so?! Now when facing the same problem with the original chip I must have overlooked something that may have to do with the battery. Does anyone have a clue what I missed?