Quote:
Originally Posted by EllowViper
Picked up a 98 PCM pretty cheap locally. I didn't really need it but what the heck..the price was right. I know the 2000-2002 PCMs had a few issues with throwing misfire codes due to the fast and unexpected acceleration a ROE introduces into the equation. Different programming design/tolerances from what Sean tells me. Thus far, my stock 01 PCM was working fine (from what I could tell). I put the 98 PCM in the other day and WOW. Talk about a difference. Idle is now right at 14.5-15.5 AFR (I could not get the 01 dialed in at anything other than 12.5-13.5 regardless of individual cylinder trim settings. I had thought the ROE short runner manifold was the primary culpret so I just lived with it...maybe not.) Run-up on boost is instantanious. I thought it good before, but the 98 PCM must have some really different programming. I need to do a bunch of logging, etc to dial this new arrangement in since I doubt my tune is optimized anymore. Anyways, just an interesting observation.
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Interesting experience. Are you positive your old PCM had not been flashed by an after market tuner?
Seems the benefits you are seeing would also apply to a 'hot' NA set-up too. Just do what you can to demonstrate/confirm the 2001 pcm was 'stock' and unmolested, and then do the same for the 98....so we KNOW the pcm comparisons are stock to stock. Or do I have this all wrong and the pcm's have been flashed for the roe. Is the roe tune being handled via a vec or other piggyback?
Thanks !