[MichaelDay]

quote:Originally posted by Topless in Cali

It's great to hear no one is having any problems w/s1 & smog. DC just didn't want to spend a few extra bucks getting the cert.
I don't think anything in the s1 pcm has been "modified" since it is a whole new program, not a "modified" program. IMO, there wouldn't be any need to have both programs(stock & s1) on board with s1 since you have to buy a whole new unit and you would have your stock unit on stand by in a "just in case" situation...[:I]

You are correct that the entire PCM is replaced and thus you have a "new" program. I am not sure what you mean by "I don't think anything in the S1 PCM has been "modified"." The PCM monitors hundreds of parameters from the vehicle and makes adjustments based on those parameters. The S1 PCM uses a different set of values to determine how the engine responds to those parameters. There are also a number of tests that the PCM makes that can trigger error codes. It appears that the S1 does not comply with ALL the required EPA monitoring. DC never indicated that they would even try to get CARB certification on S1. There was an indication by some of the MOPAR engineers that they were going to try to get CARB certification on S2 for the PT. What happened we will probably never know but it appears that they just scrubbed S2 for the PT instead of getting CARB certification.

The little sticker on the S1 PCM that says "not legal for use on pollution controller motor vehicles" is not a good thing.