suprapowaz!(2);1945765 said:what controls the iac valve? What tells it to open and close?
tps.
suprapowaz!(2);1945765 said:what controls the iac valve? What tells it to open and close?
3p141592654;1945784 said:WTF? The ECU controls the IACV based on the programmed target idle speed versus coolant temp and the actual engine rpm measured.
Suprapowaz!(2);1945963 said:I did look at tsrm, but it's only shows you how to test it and r&i. The reason I'm asking is because lately my idle has been surging from 400-800rpm with it dying out at times. At first I thought it was my map ecu tune, so I unplugged it and went back to the lex afm to rule that out. Still surging and dying. I keep hearing a hissing sound around the intake pipe come a go. The hissing goes right along with the idle going up and down. I took off the intercooler pipes and inspected all couplers for leaks. I then realized that it was coming from the pipe that goes from the IAC to the intake pipe pre turbo. I don't know why, but it keeps opening and closing after the car is at normal operating temperature. I did remove and replace the oring on the CPS, but I was having this problem before I did that. It just randomly started happening. I'm about to go to the garage and put power to it and test it out. I think it might be time to replace it. We'll see.