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why is my timing retarded? repost from the 700 board 200

uid 22065's pic
posted by  Grif on  Tue Sep 21 17:06 CST 2004
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last visit: Wed Mar 13 19:50 CST 2013
[RELATED]



I stand corrected. The 02 sensor does not communicate with the ICU at all, like lucid indicates. Also, I had no idea that the 740 doesn't have adjustable timing. I guess I really don't know anything about 740s.

So, I checked the 700 series FAQ and it directly mentions that there have been reports on the knocksensor wiring getting interference from the alternator causing unexplained retardation.

I know you have played around with unplugging the sensor, swapping it out and all that but in order to diagnose this theory you will have to remove the knock sensor wire from it's current path. Even if you unplug the sensor the existing wire will still act like an antenna.

Here is a link to the FAQ that mentions it:

http://www.brickboard.com/FAQ/700-900/EnginePerformanceSymptoms.htm#RetardedTimingorKnockSensorCode



--
- Mike






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