I had the dealer service my PCM, and this is what the ticket says

"CUST STATES SHAKE/SKIP AT IDLE. SES LIGHT COMES ON. ADVISE.
RAN TECH-TWO CODE P0175 BANK 1 RUNNING RICH. FOUND NEW UPDATE
FOR PCM FOR FALSE CODE P0175. ENGINE HAS NO MISFIRES. THESE ENGINES
IDLE ROUGH SOME. REPROGRAMMED PCM AND TEST DROVE, ENGINE RUNNING AS DESIGNED, RERAN CODE P0175 PASSED."

I SWEAR it feels weaker, but I bet the dealer wouldn't agree. Is it possible the 02 sensors needed replaced instead of this reprogram? Basically, have you ever heard of this, and what is the likelyhood this really did affect my performance? Thanks

joe

 

ttt

 

have you ever had the car tuned for ryour mods if so then you lossed it when they reprogrammed it. might be why it feels weaker

 

car is 100% stock

 

My guess is that it's just in your head.
If you don't think so and want to replace the O2's it might not be a bad idea.
But I doubt the reprogram by the dealer hurt your performance.

 

I agree with Dan. A smoother running car feels slower just as a loud exhaust feels like it's faster.