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Discussion Starter #1
95 T A. New engine. 383 stroker. Supercharged. Cant get it to pass emmisions. CO and HC too high. Any suggestions?
Thx
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Did you change the oil & filter right before going to emissions? Also air filter.

You might have to disconnect supercharger and think about buying another PCM which you could have tuned for lowest emissions. For tuning contact Solomon @ www.lt1pcmtuning.com

Try this salvage yard search engine for another PCM. You can search your state, region, or whole country. Yards on search engine ship parts. www.car-part.com

Craigslist, offerup, & Ebay are more choices to search for a 94-95 PCM. Since you'll be sending PCM off for a tune, 94-95 caprice with L99 or LT1 engine will work. Also 94-95 impala ss, buick roadmaster.
 

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Discussion Starter #3
Yes I changed the oil and filter. I will try the air filter next. Thanks for the info.
 

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Discussion Starter #5
Thanks for the help and suggestions guys. I replaced the CAT and a spark plug wire that was sitting on the headers and it passed emissions with no problem at all.
 
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