My 2010 cobalt sstc is having problems. i switched from the trifecta 91 tune to the trifecta E47 tune. my car is kinda sluggish, it wont let me build any boost after i drive down the highway for about 5 minutes, but boosts fine in town. i was throwing a MAf performance code so i replaced the maf and still having issues. i now through a cyllinder miss fire in 1 & 3. the RPMs will hold or decrese very slowly after i let off throttle. Is this all tune related??

 

Probably. I don't think I would trust a trifecta tune

 

You have a boost leak!

 

If it was a boost leak id think itd do it more frequently???

 

P0101 MAF code?

That's a a boost leak.

Make a boost leak tester and go from there.

 

whats the best way to make a tester?

 

Forum search bar is your friend.

https://www.cobaltss.net/forums/how-...ss-lnf-223319/

 

Get rid if that trifecta tune asap

 

what tune would you recomend then?

 

First before getting a new tune you need to check for boost leaks.

Then you need to log your current tune to see how it's actually running.

Then decide if you want a new tune.

 

Its a trifecta tune, he wants a new tune, or he wants a new engine

 

I recommend u get hptuners and get km043 or another good tuner from this site to tune you remotly. If this all started happening after the new trifecta tune then its most likely the tune. How do i know and why do i bash trifecta tunes? Because i was one of the biggest trifecta fanboys, back when vince did the tuning, but then i got a zfr and got retuned, if u can call it that, vince was no longer doing the tuning. For a month i screwed around with their usless tuner to get my shitty tune running right, fuel trims all out of wack, couldnt do it, didnt know what was wrong, so i got hptuners, and told trifecta i was done with them. In one freaking log and file terminator 2 had my car running almost perfect. It took about 7 revissions , which is normal to perfect the tune which was far stronger than trifectas tune. Im not the only story like this, u be the judge