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Can My O2 Sensor be Bad?? 900 1994

posted by  Will740turbo on  Mon Jan 13 23:37 CST 2014
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last visit: Wed Oct 22 16:09 CST 2014
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Is the high idle present with the AMM disconnected? Does disconnecting it stop the high idle?

An O2 sensor can be worn and not throw a code (they get slow as gunk accumulates in them, I think), but you'd see more minor problems.

Which ECT did you replace? There are 2 or 3. How's the IAC? Run the OBD1 self-test and see if it thunks like it should, or if it hangs up. Also, removing it and checking it by hand (One user replaces it with a gas-valve, I forget the diameter) and for operation.
The other easy check would be unplugging it while the car is running (it should stall), but I'm not sure that's safe for the ECU.


If you shut down the car after a high idle, are the plugs soaked in fuel?






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New Can My O2 Sensor be Bad?? [900][1994]
posted by  Townshend Act subscriber  on Mon Jan 13 05:51 CST 2014 >


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