Not sure what it is, checked for a boost leak and didn't find one spark plugs are still the stock plugs that came in the car it's a 2011 GSR very lightly modded with catback exhaust, intake, tune, and aem tru boost car just started acting up a couple weeks ago doesn't want to hardly run when the engine is cold, and seems to drive fine until I hit boost more than 5-7 lbs depending on which gear I'm in, if I turn up the boost to 23lbs it runs better than just with stock boost. Any ideas?

 

I have some ideas, but would like to see a log first. You can email it to me.

What are you tuned on?

Also, I see you're not too far away. I was just in Denver today. Anyhow, if you want to drive up to Greeley I can help you diagnose it and adjust the tune/mechanical issues. LMK.

 

Great idea... car runs like crap... lets turn up the boost. Now if the plugs are the same ones from the factory from 2011 ii would say start there since they are 2 years old. And please do us a favor and learn whhere threads need to be posted... this is the evo 8-9 section not the x section.