Hey guys, i've got an 06 cobalt 2.2L with 150,000 miles and the past month or so its been starting great but once its started you've got to give it gas to keep it from stalling. It only happens when it hasn't been started for a while though, you've got to give it gas for 10-15 seconds to keep it from stalling then its fine, the RPM's shoot up and your good to go. I just changed the fuel filter not to long ago, everything else is pretty much original. I'll be changing the plugs this weekend as i figure after 150k its about time Any other ideas what it could be i've included a video, its not the best for hearing the problem but it may help.

Also i'm not sure if its related or not but after i fill up with gas the car refuses to idle as well, i've got to keep the gas up and the RPM's around 2k or it will stall out, but once your going down the road its fine as well.



Video Link

 

sounds like a evap issue

 

You were right, tested the Evap vent Solenoid, never was shutting off, got a new one runs great and even starts after putting gas in it...amazing! Thx for your help

 

if a evap solonoid is stuck open itll most likely not throw a code but sometimes will. Itll basically suck fuems inand try to kill the engine ect when you have a fuel start up because wher are the fuems supposed to go lol. but your welcome.