I have an idle speed @1500rpm at rest also had a number of codes
p 0122
p 0301
p 0507
so yesterday changed the TPS and the EGR
took it back to scan and
p 0122 it said input blow minimum voltage requirement
p 0507 rpm higher than expected
p 0301 cylinder 1 misfire

today removed bosch plugs with ac delco
removed cleaned and replaced IAC

SES light was out
Idle was at about 1000rpm but noticed when I turned the A/c rpms dropped to @500

ses stayed out for 20 miles but came back on

Is my high idle due to some type of vacuum leak any other suggestions?


thanks

 

I forgot to say its a 02 sl-1 that im having issues with

 

Well, I agree that 1,000 is higher than normal, but with the A/C operating, that level is correct. Do a reset on the scan codes, and drive it a bit to see if you get your SES light back. If you do, re-scan the computer and post the codes again.

A vacuum leak could be your problem, but that would tend to affect driveability and fuel mileage. Since you didn't mention either issue, I can only assume those areas are not a problem. Your new plugs are not platinum (I hope) cuz platinum plugs just don't work well on Saturn engines ...