I'm wondering what other ISF owners are seeing when you're in D (drive) and parked (like at a stoplight). Is your RPM's around 500, 600, 650, 700, 750, 800, 850??? Looking for a comparison, since mine seems pretty low. If you can post your "warm engine" numbers, that would be nice. Thanks.

 

Funny you posted this. Just a month ago my idle at a light dropped to 500 and I felt the steering wheel vibrate just the slightest bit. I have been watching it like a hawk ever since.
I'm fanatical about operating temp. "Light 'em up, Patrick" - sorry not at operating temp. "Wanna run, Patrick?" - nah, not at operating temp. "Impress me and the skirt comes off, Patrick" - this I cannot do as I am not yet at operating temp.
So 95% of the time, at 3 oil temp bars at a stop light, the RPMs are at a very steady 600 or 700. Occasionally they're a bit higher - say 800. I always figured this was either due to the weather, or perhaps a 5 degree difference on that third oil bar. But as I mentioned, I did hit 500 and it felt unnatural. Once I got going it didn't happen again.

I'm hoping it's just my battery going.

 

Cold weather arrived this weekend in the South and that could be part of the change. I've been used to a ~650 to ~750 RPM state when stopped at the light. This morning, the car was idling around 500 or 550 at the light. Seemed odd. No vibrations or rough feeling, just lower than typical. I just had the Trans ECU replaced by the dealer, maybe they also reset the engine ECU and it needs time to re-learn.

 

This literally had me dying laughing cause this is me too hahahahaha

 

No vibrations or rough feeling either

 

In FL, the A/C in the car is always on. With A/C off, the idle is lower in rpm.

 

Mine will settle at 500-550 at times too(with no AC), but idles perfectly smooth there.

 

Yep, I also have 500-550rpm idle. It feels disconcerting, especially on a hill. With the AC on, the car feels much better idling.

 

I'm in Florida, majority time at idle with no accessories on except the radio, it's around 500 rpm. With anything else on, lights, or ac, it's a bit higher maybe 700.

 

I'm usually bouncing off the red line at lights.

 

Minimum spec is 500 rpm with the A/C off.

 

If you have a loud exhaust setup by turning off ac the car is practically noise less. This was also true on muffler delete of the Joez.

Currently I'm running ppe headers and Joez.

I have the rr racing tune and I cannot exactly recall but I feel they run the rpm idle slightly different?

 

thanks for all the input everyone. felling much better about my concern now.

 

happens to me all the time. if i don't have ac and or headlights on it will sit around 500 but if i turn on my head lights or turn on my ac/fan it will jump back up to 1000

 

This. These are the two normal conditions that drop idle. I've driven with the lights always on since I've bought it. So the first time I let someone borrow it and idle was low I was a little concerned. Then I found they turned the lights off.