- Joined
- Jul 2, 2007
- Messages
- 5,294
Preferably experienced with Subaru. I know I keep posting about my car, '09 Forester. But today it's done something that I think narrows it to maybe a calibration issue with the Electronic Throttle assembly on the throttle body? About a $600 part.
Yesterday I did another idle re-learn on it in attempt to get the idle to factory spec 650 rpm, as it was sluffing at about 450 - 500. No joy on the re-learn and worse, it seemed to widen the overall resolution of the throttle to where it took noticeably more pedal movement to get to a given rpm yielding a slow linear rise instead of the crisp flaring response that has always been the norm. Talking about shifter in neutral, clutch pressed down, stationary and rpm response on tach vs. pedal action.
So later today I had the idea of going key-on with system energized but engine off and pressing the pedal through full range of motion a few times slowly and a few times quicker (but not slamming it), then key off. Waited a few seconds and started it up, repeated the neutral test on rpm's and pedal travel. It was back to normal, nice and crisp again plus now idling at or near 650.
Wondered if I had only erased parameter data and it would re-learn upon driving, and go back to its prior low idle and sluggish response. However, went ahead and drove some and the normal state has held through several on/off cycles running errands this afternoon (day off) and mixed town/suburban driving.
Sure seems to point to the throttle controller playing games. Was wondering if any techs had run into this with electric throttle plate Subarus?
Yesterday I did another idle re-learn on it in attempt to get the idle to factory spec 650 rpm, as it was sluffing at about 450 - 500. No joy on the re-learn and worse, it seemed to widen the overall resolution of the throttle to where it took noticeably more pedal movement to get to a given rpm yielding a slow linear rise instead of the crisp flaring response that has always been the norm. Talking about shifter in neutral, clutch pressed down, stationary and rpm response on tach vs. pedal action.
So later today I had the idea of going key-on with system energized but engine off and pressing the pedal through full range of motion a few times slowly and a few times quicker (but not slamming it), then key off. Waited a few seconds and started it up, repeated the neutral test on rpm's and pedal travel. It was back to normal, nice and crisp again plus now idling at or near 650.
Wondered if I had only erased parameter data and it would re-learn upon driving, and go back to its prior low idle and sluggish response. However, went ahead and drove some and the normal state has held through several on/off cycles running errands this afternoon (day off) and mixed town/suburban driving.
Sure seems to point to the throttle controller playing games. Was wondering if any techs had run into this with electric throttle plate Subarus?