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
  • ✓ASE Certified Mechanic
  • 17,250 POSTS
  • ASE Certified Mechanic
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
Avatar
MERLIN2021
  • ✓ASE Certified Mechanic
  • 17,250 POSTS
  • ASE Certified Mechanic
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
  • ✓ASE Certified Mechanic
  • 17,250 POSTS
  • ASE Certified Mechanic
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
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.