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fuel codes and bad mileage - what's up? 900 1994

posted by  jadnhm on  Mon Jun 2 11:35 CST 2008
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last visit: Tue May 22 18:03 CST 2012
[RELATED]

I have been looking at a buddy's 1994 940 - B230F with Rex/Regina fuel system.

We pulled 2 codes out of the fuel computer
2-3-1
2-3-2

which I believe the book says are lean/rich at idle AND part load.

It's getting decent mileage but not nearly as good as it used to get. Around 15-20% worse.

We tested the O2 sensor, and it seemed to be working just fine.

I don't really have any experience with the Rex/Reg fuel system, and I don't really know what to look at next.

Any ideas?

Any help would be much appreciated.
--
1986 760 (B230FT) 420k+






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