BADASS of New England

An automobile club for the enthusiast who enjoys the last of the big GM cars. The rear wheel drive B and D bodys. Chevrolet Impala SS, Caprice, 9C1, Buick Roadmaster, Oldsmobile Custom Cruiser, Cadillac Fleetwood
 
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 winflash error- pcm junk?

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FUN-9C1

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Posts : 146
Join date : 2009-05-09
Location : lakes region, NH

PostSubject: winflash error- pcm junk?   Wed Feb 24, 2016 9:01 pm

Man I tell you what, this PCM programming thing has been one "thing that should have worked but didn't" after another! I finally got to the point where I successfully saved my wagon's factory program onto my laptop last night with TunerCATS and was able to tweak it at the dining room table with Tunerpro- nothing serious, shift points mostly, and was looking forward to seeing the "new" RMW act a little different on my way to work this morning........ well, I hooked the laptop to the car, did the vehicle ID, that worked, I went to program, and..... It pooped about 5 seconds into it and I noticed that the fuel pump would not come on anymore. I was not able to connect after that- I tried about a dozen different times using different tactics each time.

So.... it's like midnight thirty and I have to get to work the next morning, so I borrowed the performance programmed PCM out of the 9C1 and stuck it in the wagon (because the wagon has snow tires and I try to keep the 9C1 out of the snow, and it was snowing), it started, so I shut it off and went to bed.

Holy crap that wagon was a different car on the way to work this morning! LOVED IT!! Gotta copy that to the RMW's PCM!

I read online today that maybe once the PCM is unhooked from the battery for a while, maybe it will be able to connect... here's hoping. Raining too much tonight to try it, but I'm looking forward to trying it again tomorrow or the next day.

Also from what I read today, frying a PCM using TunerCATS winflash is a very common occurrence. Any thoughts on that? Next time I will close my door (no interior lights on) and unplug my GPS (forgot about that at the time). Maybe that will make a difference? Plug in the laptop?

If the "unplug the PCM for a while" does not work, then it's back to the drawing board......

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