T-Cgst7
Probationary Member
- 6
- 0
- Sep 22, 2014
-
Lancaster,
Pennsylvania
okay so recently I the CEL came on for idle air control problem and 02 sensor bank one. I replaced the upstream o2 sensor and a week later replaced the idle air control valve. when I replaced the IAC I turned the car on it started to idle at 2500rpm and then slowly dropped to 1500 as the engine warmed up. I put the car on reverse and it started to idle up and down from 1500 to 2000 when the car started moving. when the car stops it finally goes back to 1500 and stays there. i tried disconnecting the tps when the car was on and it started to idle higher and when i connected it back on while it was on the idle went down. i also tried to adjust the BISS but it does nothing. my vacuum when the car is on is 20 and it starts to fluctuate when it idles up and down.