ok my car is is having an issue.. one day im traveling from ohio to Virginia... i want to have a lil fun in the tunnel.. my car boosts up to 15 of the 19 available PSI and stats sputtering.. boost fluctuates up and down... and i have not only a bad purge solenoid for the 4th time... but misfires in 2 and 4 cylinder..... anyone know what this could be?? spark plugs are immaculate still.... maybe an injector problem?? orrr perhaps fuel regulation issue?? i lost fuel economy too. used to be at 36 when not in boost. now im at 26-28 highway range.. still under warranty but have a few mods so debating whether or not to go.. right now im in ohio with no stock parts around me and i dont think anyone wants to buy my CAI+Charge pipe combo for 500 bucks up here =[

 

Just go to the dealer if you have your warranty

BTW, what are all your mods?

 

coil pack

 

only engine mods are Hahn CAI and Charge pipes with s ynapse BOV.. had to sell my Hahn intercooler =[

 

Fuel trims is my thought. Driving from Houston to Dallas and back (~5 hours each way) it got to where I couldn't boost over 7psi without it misfiring, sputtering, and then going weak on me. When I got back into town, the idle would even fluctuate slightly.

I think long trips at continuous RPM and speed cause fuel trim skewing.

Take it out, drive it around town and the problem will eventually go away. Driving around town the following day, mine went from only boosting to 7psi and sputtering, to making full boost but not being able to go above 5200 at any throttle or gear, to making full WOT runs in stock and tuned mode.

Ever since then, it runs like a champ with no issues now.

 

well im lookin at getting potentially retuned up here in ohio... if im lucky.. im usin my GPS as collateral... cause im sittin at 262 to the wheel with 19 PSi