EllowViper
Enthusiast
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.