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Back to square one:
With the key on there should be battery voltage at the coil and at one of the two pins at any injector.
No voltage at the coil is usually a bad ignition switch.
Voltage at the coil but not at the injectors is usually a bad DME relay.
Voltage at both but no spark is usually the reference sensor and/or it's adjustment. Note that the adjusment is done with the rear speed sensor and the reference (front) sensor follows along.
However no spark can also be a bad coil, coil to dist wire, a broken pin on the flywheel, a bad cable from the sensors to the DME, a bad DME, a bad or loose rotor, a bad dist cap, a broken timing belt.
Putting a spark plug wire directly into the coil will eliminate the dist/rotor/timing belt from the equation. Checks the flywheel pin and sensor wiring and adjustment.
Running a jumper from the battery to the coil will eliminate the ignition switch.
Using the bifricated jumper to replace the DME relay will eliminate the ignition switch too. This will also run the fuel pump. Don't leave the jumper in it if it does not start.
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Hugh - So Cal 83 944 Driver Person
NOT a 'real' Porsche -- Its Better!!!!
When was the last time you changed your timing and balance belts and/or cam chain and tensioner?
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Never break more than you fix!
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