OK I was having a problem with my truck that it would stall out when the engine is cold if I'm not driving. It would start to idle rough and I could hear a loud sucking noise.
After some time on the boards I came to the conclusion that it was the IAC because it seemed like my problems matched that of many people on here and it all pointed to the IAC.
I replaced the IAC but it still has the exact same problems. Same sound same rough idle when cold and same stalling problem.
There is no CEL. I even scanned it and there are no stored codes either.
Anyone have any idea what could be going on here?