Hi Guys:
A few months ago, I downloaded a stock V4P tune (tow pack, 3.42 gears) from a trusted source. I am converting my current 94 Cadillac Fleetwood to tow pack specs and after I changed out the gears, proceeded to load up the V4P tune. TC did all the things it was supposed to do, (have done this before 20+ times so know it works), turned off ignition when prompted, did my disconnect and on restart, engine went wild. Reconnected and the dreaded "no communication" came up. The ECM was dead.
Replaced the ECM with spare, did a speedo recalibrate on my original tune (2.93 gears) and was back in business. Can't immediately point my finger at the file I downloaded off this site but it did come as an "LT1" file and I converted it to a "bin" file. I would really like to try out an original V4P tune, modified for fan temps to see if there really is much of a difference but as you can imagine, I'm a little gun shy now (no longer have a spare ECM). To this end a few questions:
1. Can you load an LT1 file directly or must you convert it to a bin file?
2. Could I have corrupted the file by saving it as a bin file?
3. Is it possible for a bad file to knock out the communication capability of the ECM?
4. Is it possible to resurrect the original ECM?
5. Is there a utility in TC (or an add-in) that can check the integrity of a file?
As I said, I can't really point my finger at the file as there is a possibility that something else happened during the upload. Have been playing around with the tune for a few months now and this is the first time I have had any problems. The only thing I can say I did differently was this was the one and only time I did this on the laptops battery alone. All the other times it was plugged in. The battery still showed 98% after the fact but maybe something happened in the background that didn't show. TC acted normally during the upload and terminated normally.
Sorry for the long post but could really use some advise. Any help would be appreciated.
Bill
