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311 OBD Code 200 1991

uid 27's pic
posted by  Art Benstein on  Sat May 30 10:39 CST 2015
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last visit: Fri Oct 17 20:10 CST 2014
[RELATED]

In the 89 cluster pin 6 is tied to the double spade, so that isn't it, if you're sure it is an 89. 89 is the first LH2.4 year, and LH2.4 brought OBD and VSS feedback to the ECU. This happens on pin 6. If you leave the 89 in place, then the splice to the spade lug is redundant. Speedometer never falters?

The 113 is what the ECU sets when it gives up entirely matching the injector duty cycle to the AMM output for closed loop (input from the O2) and gives you limp-home. Make sure it repeats (by resetting via fuse 6 and trying again) before replacing stuff. You can guess at grounds, but nothing beats actually measuring the voltage from the oxygen sensor.
--
Art Benstein near Baltimore

Being right is highly overrated. Even a stopped clock is right twice a day.






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