GeforceXtreme

Any HP tuners on here? My car came with a locked Trifecta tuned PCM. I just recently swapped in a stock replacement PCM. After installing the stock PCM, my car has a very rough idle when you first start it when it’s cold. Almost like it’s cammed. After the 1st initial warm up it’s perfectly fine and idles smooth. I didn’t have this with the Trifecta tuned PCM. Being that PCM is locked, I am unable to pull the information from it to see what they had the settings for it. So I am wondering what should I try adjusting in the PCM to help with the cold startup? I have already HP tuned the car and its running great besides the startup idle.

09 SS/TC
HP Tuned @21psi
K&N SRI Intake
Hahn Upper IC pipe and Intercooler
Cat & Muffler Delete

Also should I just stick with 21 PSI or push it any farther? My car does not have the 3 bar sensor upgrade.

ECaulk

iTrader: (6)

Did you go through the LNF how-tos over on hptuners forum?

Because you need to do the MAF adjustments for the K&N

GeforceXtreme

Made adjustments to the MAF Calibration tables but I haven't done anything with the MAF correction table yet.

ECaulk

iTrader: (6)

Go through the maf how to it takes some time, but it will smooth out eventually

09CobaltSS1

If you want, email me the file and I'll take a look at it for you to help with the issue.

ECaulk

iTrader: (6)

Take this man up on the offer

GeforceXtreme

Certainly will send him my current tune.

Iam Broke

iTrader: (10)

Sounds like it needs the cat warmup disabled.

09CobaltSS1

The cat warmup was actually already disabled in his tune. His cam phasing amongst a few other things were is main culprits. The car cold starts and idles like a gem now..

ECaulk

iTrader: (6)

Nice, glad you where able to help him out