Quote:
Originally Posted by eriktherod
My theory is that when tuning the ECU, Toyota accurately mapped a temperature range for Japan (we'll say <86*F). So with a common heat soak of +10-15*F on the intake air, they have it mapped properly for <100*F and I don't think I've seen it happen on temperatures that 'low'. However, once you start getting into the higher temperatures, the ignition timing retards back more and reaches a point where the ECU can't hold the rpms as steady at idle so it just does this balancing act instead.
If this is true, then it's just a matter of Toyota/Subaru playing with those mapped values to alleviate it. It could be that they knew about it, felt it wasn't a major (problematic) issue and can fix it once the car is out.
I'd love to hear how you guys in extreme heat (TX/AZ) have been with the car at idle.
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I don't think this is the issue. This morning it was cooler outside (15c) and when I started my FR-S, it ran like it had a misfire. The idle dipped below 500 and then jumped back up to 1000 once or twice. As I proceeded to drive it, the engine would not accelerate normally and felt like it wanted to stall. The rpm kept dipping (almost to a stall) so I pulled over to the side of the road and turned it off for a few minutes. I've already had my (AT) FR-S repeatedly stall on me about 3 or 4 weeks ago, but since then it had been good. This morning the issues started again, but this time from a cold start. When I started the car after waiting a minute, it seemed to settle down and I finished my drive to work.
I'm going to call my dealership and document the additional engine issues I have been having.
Rob