the car starts hard and has an idle at about 1800rpm i hooked up the scanner and checked the iac and it showed 0 i tested the operation and it seemed to work as it would let me raise the rpm and bring it back down but not below 1800 rpm i disconnected the iac and sprayed carb clean and couldnt find any vac leaks the only code stored was idle speed not achieve +- 100rpm any ideas???????????

 

iac @ 0 and high idle. absolutely a vacuum leak and a big one

 

when i block off the iac port in the throttle body the idle comes down to 700rpm and idles smooth and steady

 

verify the iac is able to move if u have a good scanner u should be able to move it thru the functional tests

 

Just a little history on myself i'm ase cert and have been wrenchn 18 yrs so i know what your saying i was able to move it with my snap on solus but it wouldnd let me slow it down past 1700-1800 rpm i replaced the iac and it idles normal now must have a bad spot in the old iac thanks for the help jasperwk