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- - Idle RPM not consistant (https://www.cadillacforum.com/forum/cadillac-cts-11/idle-rpm-not-consistant-3026/)

nobde

06-20-2007 06:33 PM

Idle RPM not consistant

I have a buddy who has a 2005 Caddy. When he starts it the idle speed goes up and down, but this does not affect the performance. I thought maybe it was an oxygen sensor. Anyone have any other ideas?

Stealth

06-20-2007 11:16 PM

RE: Idle RPM not consistant

idle speed controller .. 99% sure.

nobde

06-21-2007 03:17 AM

RE: Idle RPM not consistant

Thanks, I will let him know.

nobde

06-23-2007 07:04 AM

RE: Idle RPM not consistant

Just got an email from my buddy. He just got his car back from the garage. They reset the computer and now everything is OK.

I just wonder if it will last or the problem will show up again later.

Stealth

06-23-2007 08:56 AM

RE: Idle RPM not consistant

that is no so common, but it does happen

what i have seen as most likley issues are:

- ISC,
- coke buildup in intake throat
- ignition issue - coils, wires, plugs, etc,
- emissions controls issues
- grounding issues
- ECU
- valve issues
- etc ..

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