rebuilt the heads on my 2000 2.2 engine - problems

[buzzcon]

Now I have fast idol  & it starts surging as its warming up. Idol drops to 1500rpms after it's warmed up. I cleaned the throttle body, which may have been a mistake.I'm throwing codes P1507 & P1133. When I turned on the AC it started surging & if I run the rpms up to 2000 it starts cutting out.Past 2000 it runs fine.I think 1133 is the front oxygen sensor & P1507 has something to do with the throttle positioning. Someone please help me. 

[Mike104]

P1137 is the front A/F Sensor (commonly called 02 sensor)

 

P1507 Idle Control System Malfunction (Fail Safe) 

 

Maybe try Googling those codes to help troubleshoot

[GeneralDisorder]

Make sure the O2 is plugged in. If it is get a new one. And then you need to clean the idle air control valve.

[Fairtax4me]

Vacuum leak.

[Mike104]

Vacuum leak.

 

I've left the big 3/4" hose under the intake tube to the airbox before and it does not like running with that hose disconnected (large vacuum leak)

[buzzcon]

I disconnected the idol air control valve & started the car...idling at 1300 rpms & surging, plugged it in while running ...stopped surging rpms went to 1600 & started surging as car warmed up...stopped surging when it reached normal temp. still had fast idle. I'm going to remove iac when I find a replacement gasket, having a hard time finding one. Thanks for your help.