2002 Ion 2.2

[Mikebutler5963]

I have a 2003 Ion w/ a 2.2. I had a tune up done and afterwards the car hesitates right before I press the accelerator pedal (in drive or reverse). If I give it gas at the hesitation point it will die, if I wait for it to stop hesitating it's fine.

I'm getting a P0507 code and I replaced the IAC valve. It stopped doing it for a half of a day and the CE light came back on.

I sprayed Carb cleaner around the whole engine compartment to eliminate a vacuum leak. So now I'm stop, if it was a throttle body I would expect it to do it a lot more then just a rolling start.

Any ideas or has anyone came across this issue before?

Thanks in advance.

 

[Mikebutler5963]

PS it does not do it at cold temperature only once it gets to operating temperature.

 

[GTSRider]

PS it does not do it at cold temperature only once it gets to operating temperature.

I have a 2003 ION with the same exact problem.
Did you ever find the cause ?
I am now thinking computer is at fault ECM , because it does it worse as it heats up.....
and like you said , does not do it at cold start up.