[Shotimes] Fuel Mileage, fuel regulator and Codes

[Steve Weinrich]

511 codes are normal when running with an after-market chip.  The add-on
chip changes the ROM checksum and causes this self-test to fail.

542/543 are normal if the car has been stalled.

137 is bank 2 always rich.  Bank 2 is closest to the radiator and includes
4, 5, and 6 cylinders.  You have your banks reversed.

If the front O2 sensor is giving accurate readings, I would suspect some
kind of  restriction in the front portion of the intake manifold.  I can't
think of a likely scenario whereby all three cylinders would be getting
extra fuel except under the control of the EEC.

I would try a new Bosch sensor from AutoZone, reset the KAM in the EEC, and
try it again.

Steve W


----- Original Message -----
From: "John Zarebski" <jzarebsk@mnsi.net>
To: <shotimes@autox.team.net>
Sent: Wednesday, May 28, 2003 10:43 PM
Subject: [Shotimes] Fuel Mileage, fuel regulator and Codes


> I am continuing to track my mileage problem down.. Finally had some codes
> showing and need some assistance.
> 511 & 542 KOEO
> not quite sure to make of 511 EEC processor ROM test failure. Any
> suggestions welcome.
>
> 137 KOER which O2 sensor indicates system rich (left hand side). The
> cylinder balance test showed a problem with 4, 5, 6
>
> I interpret this as a faulty O2 sensor giving me system rich on 4,5,6
> Would you concur or is there something else I should consider.
>
> Other information.  Engine heads and rings done last July, new plugs,
crank
> and cam sensors, replaced one faulty O2 sensor on Bank 2(from Ford
> statement)in March for emissions testing. I am assuming  Bank 2 concern
> cylinder 1,2,3(RH) and Bank 1 concerns 4,5,6(LH).
>
> With thanks for the help.
>
> John
> Chatham ON Canada
> 93MTX, PPY, 80MAF,TB chip, Dynomax Catback
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