|
Need to clarify what is cranking and what is starting.
Cranking is just that. The engine will rotate. This is the same as turn over.
Starting is when the engine fires up from cranking (turning over).
Now onto the problem.
Turn the key on and take a volt meter and check that you have at least 12 volts at the small wire on the coil. Pull off one of the plugs on the injectors and check the pins for 12 volts. One will have the same voltage as the coil or battery. The other pin should be a tad lower.
IF you don't have voltage at the coil it's mots likely the ignition switch.
IF you have voltage at the coil and not at the injectors then it's the DME/fuel pump relay.
IF you have voltage at both places then the reference sensor could be intermintent from cracked plastic connectors at the sensor.
In some cases you can take the sensor plugs off and on a few times as this cleans the contacts.
So it's possibly the ignition switch or DME relay or reference sensor OR all three.
__________________
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?
New Users please add your car's year and model to your signature line!
Never break more than you fix!
|