so my cobalt is still running really really bad...i thought cus there was 87 gas put in was running bad so i filled it with 91 and reset the ecu and it still runs like ****...the car does not drive over 5,000 rpm its a ss/sc by the way...it goes up to like 5k and then just like sits there..also once it starts boosting there is a squealing sound besides the blower whine the starts to get louder..sounds like the belt on pulley....then if i just sit and rev a little bit the motor climbs down real slow than sits at like 1800 for 3 seconds then goes back to idle...what is rong with my car...do i need to take it to chevy....theres no codes i already checked...i dont drive the car much but every time i do it acts up...please any imput would be greatly appreciated....

 

Remove your mods if you have any and bring it into your dealer asap.

 

no mods but a fujita intake....the car is stock...should the car not be driven the way it is...

 

sounds like a problem with the electronic throttle control. Maybe a engine misfire is causing the pcm to limit the throttle?

 

i would not be drving it any where other then to the dealer

 

sounds like a common problem that the dealer has a re-flash for. i would take it in.

 

if all you have is intake, just take it to the dealer the way it is, they aren't going to care about that....but you need to get it to the dealership asap. that was retarded to put 87 in it though.....

 

yah my dad bought me the car and had put 87 in on the way to my house..it was only driven like 10 miles on the 87