'86 4000 csq power loss - fuel system problem

[rizov_d at shaw.ca]

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Hello,

I'm experiencing performance loss on my '86 4000 cs q.

With full throttle  the limit is 130 km/h.

When measured the differential pressure regulator (KE Jetronic) current is
steady 17,7 mA as for rich stop.

(Elevation is 3300 feet)

No fluctuations.

 O2 sensor works (fluctuates by himself).

Full throttle suitch when closed reduses current to 10.7 mA

Adjustment of CO : the engine changes rpms but the readings remain 17.7 mA.

Any suggestions are hihgly appreciated!

Dobby