Hope this isn't too much of a re-hash from other similar topics.

My car idles great until the water temp on the Commander hits 85C. At this point it goes crazy...idle varies from roughly 1500-2200rpm. When I had the ISC deselected it would start at 90C, but now w/ the ISC selected it starts @ 85C. It's like turning on or off a switch.

I didn't know if resetting the Power FC like what was described in other posts would work...letting it idle for 20minutes and then anothe 20 w/ an electrical load b/c my car doesn't have any issues w/ the A/C being on or any problems w/ electrical loads.

Thanks,
Bob

 

The most common question asked by newbs since the PFC came out.
As you said this is a REHASH^10.
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Do a search about idle problems. You have to help the idle to be lowered by reducing air flow at idle.

My notes package should help you.

 

i was having what sounds like the same problem. It wound up being that my throttle body mechanical settings were all out of whack. I purchased Chuck's notes and he did a very thorough write-up with pics about how to adjust the throttle body. I went through it and it fixed the problem 100%.

Chuck's notes are very convenient to have since it aggregates info and knowledge from different sources to provide a very user friendly way to go about base lining your car and fixing stupid issues like these.

Good luck.