Cobalts SS banner

1 - 6 of 6 Posts

·
Registered
Joined
·
2 Posts
Discussion Starter #1
Hi i have a 2007 cobalt ss sc completely stock other than a catless down pipe, when im driving and give about more than 25% throttle in any gear it bucks/surges badly untill it gets to about 3800-4200 rpm and smooths out but if i putt around with not much throttle its fine, even revving it out. At idle it also seems a little off. Ive changed spark plugs twice, cleaned the throttle body, replaced the fuel filter, replaced the maf and the pre cat o2 sensor, tested the fuel pump pressure, compression and smoke tested for vacuum leaks. No codes are present. I used misfire monitor and it is indeed missing at idle and when accelerating not like a granny, misfire is not specific to any cylinder its all over the place. Has anyone else ever ran into this issue and figured it out? Any advice is appreciated, thanks!
 

·
Registered
Joined
·
8 Posts
Dirty fuel injectors are one of the common reasons for accelerator jerking. The dirty injector leads to your car's loss of power every time you try to accelerate during a stop and when you try to drive at a steady speed.

It will be best to have it check by a mechanic to find out the culprit.
 

·
Registered
Joined
·
2 Posts
Discussion Starter #3
Steady speed is fine and its only between after about 4k rpm its fine when flooring it. Just between take off and 4k jerks like crazy
 

·
Registered
Joined
·
1 Posts
Dirty fuel injectors are one of the common reasons for accelerator jerking. The dirty injector leads to your car's loss of power every time you try to accelerate during a stop and when you try to drive at a steady speed.

It will be best to have it check by a mechanic to find out the culprit.
I agree, I got mine fixed at my nearest mechanic as they find the culprit very efficiently.
 

·
Registered
Joined
·
22 Posts
Steady speed is fine and its only between after about 4k rpm its fine when flooring it. Just between take off and 4k jerks like crazy.
 

·
Registered
Joined
·
6 Posts
Dirty fuel injectors are one of the common reasons for accelerator jerking. The dirty injector leads to your car's loss of power every time you try to accelerate during a stop and when you try to drive at a steady speed.

It will be best to have it check by a mechanic to find out the culprit.
My close friend got this 2007 SS and it does the same when accelerating. We'll work on it after we finished installing the suspension from 4Wheelonline onto the truck this week and clear the garage.
 
1 - 6 of 6 Posts
Top