2008 chevy Cobalt Jerking

2008 CHEVROLET COBALT
4 CYL • FWD • AUTOMATIC
Avatar
TMARTINAR
  • MEMBER
  • 7 POSTS
2008 Chevy Cobalt,******** while sitting at stoplights, accelerating. I have changed the gas brand to Shell and put in heet and fuel line cleaner and it still does it especally when gas tank is less than 1/4 full. What could be the issue?
Dec 31, 2010 at 5:33 PM
Advertisement
Avatar
MERLIN2021
  • CERTIFIED EXPERT
  • 17,250 POSTS
Is the service engin light comming on? Chevy has a few tech bulletins for different running problems, and even a PCM reflash, so codes are important, Autozone will read them for free, post all codes found here.
Dec 31, 2010 at 5:46 PM
Avatar
TMARTINAR
  • MEMBER
  • 7 POSTS
the service engine light is not coming on.
Dec 31, 2010 at 6:26 PM
Advertisement
Avatar
MERLIN2021
  • CERTIFIED EXPERT
  • 17,250 POSTS
Any modification to the engine or air filter? If not check fuel pressure:
https://www.2carpros.com/car_repair_video/test_fuel_injection_pressure.htm
Go here and checkout our video.
Dec 31, 2010 at 8:52 PM
Avatar
TMARTINAR
  • MEMBER
  • 7 POSTS
no modification to the engine, Jiffy Lub changed out air filter.
Dec 31, 2010 at 9:06 PM
Avatar
TMARTINAR
  • MEMBER
  • 7 POSTS
The car doesn't do this all the time.
Dec 31, 2010 at 9:25 PM
Avatar
TMARTINAR
  • MEMBER
  • 7 POSTS
could a dirty fuel filter be causing this? My wife had almost let the car's fuel tank run empty one day and this seemed to start after that?
Dec 31, 2010 at 9:50 PM
Avatar
MERLIN2021
  • CERTIFIED EXPERT
  • 17,250 POSTS
Yes if you click on the link to the cheeck fuel pressure, it explains all that. The other thing is to recheck that air filter, Jiffy lube leaves a lot to be desired...
Dec 31, 2010 at 9:53 PM