beardogg1

drove 76 Porsche home with 84 3.2 engine in it...ran fine....wont start no fire fuel pump pumps...checked with ohm testor speed and timing sensors... nothing no read of any kind...why would both go out ast same time could something else be wrong ? beardogg1

Spyerx

Did you try replacing the DME relay? Likely they have it located under the passenger seat with the ECU. It triggers the fuel pump. It’s unlikely it is the crank reference sensors on the flywheel. That relay is a very common point of failure

911PERVY

The cranks sensors are very likely to be bad if original. Try a relay as its quick but sensors seem to be the problem if both open circuit!

Felix

Can you elaborate on the testing that you did on the sensors?

911 Rod

Check for cracked wires on the censors.

Spyerx

you can check the plugs on those, and the various harness plugs, and under the seat the DME plug. its best to check reference on these at the DME plug. if no reading then try at the plug for the sensor itself. IIRC, there is an Ohm range you will get if the sensor is functioning/getting a signal.