Hello everyone!!

I just purchased a 05 Monte SS about 3 weeks ago and this past week it has been stalling out on me...it happens when I am coming to a stop or when I am at a stopped postion about to accelerate.
The person purchased it from was using regular 87 gas & since I have had it I've been using Premium, I replaced the fuel filter, fuel pump & air filter, there was no check engine light untill I replaced the Fuel pump.... but I have no idea what could be causing this.......Any Ideas?

121K Miles
SS Auto

 

Did you get the actual check engine code#?

 

Ya, it says gas cap. I havent replaced it yet.

 

maybe the fuel pump is improperly installed, causing a huge air leak at the tank. Do you smell fuel when the tank is completely filled?
Welcome btw

 

Welcome to the forum.

 

Welcome to the site. We have plenty of very knowledgeable members here so im sure someone will have some answers for you or at least a few things to check out.

 

Welcome to the forum

 

Welcome to the forum!!

 

I dont smell fuel & it only happens once in the morning after the car has been sitting overnight & once in the evening after I leave work, and once it dies out and restarts it's fine

 

So it only happens after the car has been sitting a while?

Take out the IAC valve & clean it up/lubricate with wd-40 or something. I just had the same problem.