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rich running problem solved 200 1989

posted by  vesparally on  Thu May 14 06:52 CST 2009
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last visit: Tue Oct 21 18:11 CST 2014
[RELATED]

Greeting all, awhile back I posted a rich running condition with an '89 240.
I got all kinds of codes for bad O2, knock sensor, throttle position switch, fuel trim etc....
After swapping out a bunch of parts the final solution was a bad "pink" label 561 ECM.
The car did NOT have the classic no-start problem.
Installed a used "951" ECU and all problems were fixed and car running like it should.
Moral of the story: swap out the ECU if your car is acting funky .
Thanks for all the advice
peter






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