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-   Porsche 924/944/968 Technical Forum (http://forums.pelicanparts.com/porsche-924-944-968-technical-forum/)
-   -   rough idle when cold (http://forums.pelicanparts.com/porsche-924-944-968-technical-forum/14096-rough-idle-when-cold.html)

djnolan 06-10-2017 01:47 PM
Quote:
Originally Posted by Tom944 (Post 9620456)
Sounds like the heater in the O2 sensor has failed. Initial 30 seconds is open loop then it requires the heater until the sensor warms up. Once warm the heater is not required. Change the O2 sensor.
I will do a little detective work with the Ohm meter and see what I find. Thanks!

djnolan 06-20-2017 04:43 PM
The O2 Sensor heater checked out OK with an Ohm meter.

OK-944 06-21-2017 01:14 PM
To add my two cents...I just rehabbed my ICV and my 85.5 now starts up and idles great. When I took the ICV apart, I was a bit amazed and distressed at how worn out the commutator spindle and brushes were. I cleaned the commutator spindle up as best I could...and bent the brushes inward - and now all seems well.


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