Rich stop on '86 4 ksq

[rizov_d at shaw.ca]

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Please take a look at the attachment for a diagram from the book called “Bosh
Fuel Injection & Engine Management” for clarification what I mean as “Rich
stop”



Even Bentley says that current 10 mA above is a rich stop and the cause is
grounded OXS wire (green).

That’s not the case here – I checked accordingly the ECU side of the
connector.



OXS fluctuates 0.5-0.7 V

At 3000 rpm is steady 0.8 V



Does it detect rich condition?

Is the ECU not able to correct (react) accordingly?



When I measure the differential pressure regulator current I do not use a
harness but simple set up:

      - a wire between the harness and the regulator

-         The second contacts are connected through multimeter (digital)



As I mentioned previously the car runs fine to about 100 km, beyond gets
gradually laboring and max. is (pedal to the floor) 130 km/h.



Dobby


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