I'm having trouble with my 2011 g25. On "cold" startup in warm weather, my RPMs go immediately up to 2000, then drop to 1700 and wobble between 1700 and 2000 for about a minute before slowly descending to 700 several minutes later.
This seems very odd to me. I ran some fuel injector cleaner through it, which made no difference. I cleaned the MAFs, which also made no difference. I also ran the following resets to no avail:
- Mixture Ratio Self-Learning Control Data Reset
- Accelerator Pedal Released Position Learning Procedure
- Throttle Valve Closed Position Learning Procedure
- Idle Air Volume Learning Procedure
Here is a video of the startup I took, please note that my foot is not on the gas pedal at any point during startup:
Outside temperature is 70 degrees, fuel is 91 octane, no additives.
Anyone have any experience with this? There are no codes to pull in the ECM.