Well first off I have an 06 LT auto. Recently the car has gotten a little harder to start, but my problem is when coming to a stop. The car runs fine driving but when I slow down to come to a stop when the transmission kicks out slowing down the cars idle bounces and sometimes will bounce as low as 2-300 rpm and sometimes it will die, but most of the time it levels out once I have come to a complete stop. The car generally always dies coming to a stop off a big hill. I had the CEL checked and got large evap leak detected, MAF sensor, and the knock sensor. I replaced the MAF a few weeks ago, and got a new locking gas cap the other day (this was said to be the #1 thing on the evap code) and I've searched for vacuum leaks and have found nothing. I'm stumped as of what to do next. I can't stand my car running like this and money to fix it has to come from my family due to my financial situation right now. Could the knock position sensor cause this? I don't see how but I know someone on here should be able to help me with this. Thanks in advance!

 

Bump!

 

Bump again I really need some advice, please.

 

check ur emissions fuse

 

Who tuned you?
Could also be a MAP sensor.. find someone near to swap it out and test it.

 

OK I'll look into that

 

My car isn't tuned since I'm all stock, I wish I knew someone near me with a 2.2 balt that I could try swapping parts from, this is kinda getting frustrating, lol

 

Yeah I'd take a look at the map sensor could always go to GM and have them test it for you.

 

I went and had the codes checked again today since I haven't had it done since before I changed the MAF. And MAP sensor was one of the codes but it still says there's large evap leak detected, so I'm not really sure what to do on that, unfortunately I'll have to wait till I get a little money before I'll be able to fix it, unless my dad helps me out with it again

 

find a shop that will do the smoke test on ur evap purge system easiest way to find the leak any decent shop should be able to do it

 

It could be like the SCs, where they have to clean the throttle body and there problem was fixed idk that could be a last resort that my opinion though

 

clean the TB like said above, have you ever taken it off before? check teh evap line on the top of the motor next to the cyl 4 coil see if its cracked, broken or disconnected.

you can also spray carb cleaner around the motor to find a vac leak. if the rpm's jump, its in that general area.