Js1stSubie

my 01 OB had the TPS replaced in JAN 05, and was back in due to mis-installation. same symptoms. Poor shifting, hesitation... Maybe 'mumbles' forgot to install them correctly. Seems the TPS has much to say with the ECM and TCM on these things. Once it was adjusted, she is back to driving better all the time. Good Luck.

Thanks for the info on Misfires. Is this related to the 'hesitation' issue ?. I have a 01 outback wagon, and have had the recurring problem of hesitation for some time. This thing is on its 3rd transmission, and probably heading for a 4th if something is not done about this soon. Have replaced o2, throttle pos sensor, filters, etc. and nothing works. Quite frustrating for this car. Don't really know where to turn, as I have also read it is just the car. BAD NEWS. Hope Subaru acknowledges this issue.