I dont know if some of you remember this but I had made a thread over a couple months ago about my surging iroc at stop lights and never found the problem yet....well the other day i had noticed on one of our extremly hummid days that we had i decided to turn on the a/c....turned it on and noticed when i got to stop lights it wouldnt surge anymore.....so i got curious and approached another light with the ac off and it started surging again so i went ahead and turned the ac on and then the surging stopped and it started to idle fine. Mind you this is right after i cranked the AC on to full blast then boom the car idles awsome......i find this quite strange...i really dont feel like running my AC on 24/7......what could be causing this?

 

hmm, I am very curious about this one, leaving a reply so I get emailed when someone responds sorry to get your hopes up.

 

believe me iam too, its just weird i turn on the AC (cause its hot as hell and it works mint in my car) and all of a sudden the car doesnt surge at a stop any more and idles fine.....

 

I really dont know, but there is a vacuum line that runs up to the hvac controls. I wonder if maybe it is leaking in a certain position. That would be a vacuum leak which can cause surging. That is just a guess, but it kinda makes since.

Ben

 

that's a interesting thought, I need to read up on A/C some more... I am clueless about it lol.

 

where's t he hvac controls? sounds like it would make sense, but wouldnt it still surge when the AC is on?

 

the hvac controls is actually that panel that you turn the ac on with. Part of it is controlled by vacuum. I dont know if it would actually be possible or not, but I just thought that maybe for some reason it is only leaking in certain positions or something. Like I said, just a guess. I cant think of anything else in the air cond system that would effect the way the engine runs.

Ben

 

My car has surging problems while driving and at stops ..

I dont know why the ecm is sending gaz when im not pressing the gaz.. i was told the ecm has to be changed ..

Id also check the oxygen sensor ..

 

i have yet to figure out this problem and its pissing me off, but ive narrowed it down to this......somthing is triggering this....AC goes on and the car is fine WTF!?!?

 

TTT anything I posted this in the cooling section to to see if any AC experts would chime in but noone has responded

 

ttt again