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97 impreza high idle??
Posted 21 September 2012 - 10:02 PM
Posted 25 September 2012 - 01:00 PM
How about the TPS, have you checked it's output for a smooth change from closed to WOT? - you can check it with an analog ohm meter after making sure there's no binding of the cables - pull the connector off and check the resistance readings. (You can get some of the FSMs here to find out which pin is which) The reading should be smooth throughout the entire throttle range. If it's jumpy, it probably needs replacement.
With the proper adapter cable and software, you can also get those readings through the ECU via the ODB-II or SSM ports.
Hope that helps.
Posted 25 September 2012 - 03:24 PM
Posted 26 September 2012 - 09:54 PM
Posted 27 September 2012 - 12:57 AM
Posted 09 October 2012 - 04:40 PM
Thanks everyone for your info. I believe it has some thing to do with the MAF. So i bought some brake clean and when the idle starts to act up, i spray the brake clean through the air box and the idle drops imediately, like the MAF is dirty. so if/when it acts up again, i will try this again and see if it helps. If so, i guess i will be buying a new sensor. Thanks again for all you info. Its great to have people on here who can help in times of need.
Don't use brake cleaner on a MAF. Use mass air flow meter cleaner. Its specific and available at parts stores. Not as easy to find but its around. My OReilly store has it here for sure and Napa keeps it in the back.
Posted 10 October 2012 - 12:00 PM
Posted 10 October 2012 - 02:45 PM
Have you tried pulling the IAC electrical connector while it's misbehaving and does the idle change?
This is quite puzzling.
Posted 10 October 2012 - 07:57 PM
Posted 11 October 2012 - 08:58 AM
Posted 17 October 2012 - 09:46 PM
Posted 17 October 2012 - 10:38 PM
If your TPS has a three pin connector, you can follow the instructions in the FSM for the 97 Legacy in the link I posted earlier in this thread. They're close enough in this situation.
Posted 24 October 2012 - 09:27 PM
Posted 25 October 2012 - 11:11 AM
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