My Volvo 945 is causing some grey hair. The fuel pump is running, fuel pump relay is working, ignition is ok, but there are no pulses to the injection solenoids when cranking. The diagnostic shows error vode 1-1-1 (no error). If i spray some startgas into the air inlet, the engine starts and runs fairly ok (as I see it) and there are pulses to the incection solenoids, but after a few miles drive the diagnostic diode shows code 2-3-2 (mixture too lean or rich). If i stop the engine it will still not start in a normal way. How to find the faulty part??