[ischmitz]

Sid,

When the key gets turned to ON the first stage of the DME relay turns on. That powers the DME itself, the injectors and the coil and makes the ICV vibrate. So that is an easy check for whether the DME gets power. A vibrating ICV tells you the DME is alive, its chip is working and the internal CPU is processing code. If you don't get power the most common issues are an aftermarket or factory alarm system or a really bad DME or a bad GND or DME relay.

Then, once you crank the second stage of the DME relay comes on and powers the fuel pump and the O2 sensor heater. This click can be felt when touching the DME relay while starting to crank. Unfortunately, the DME relay turns on even if the flywheel sensors are bad. So you really need to get a NOD light onto an injector connector or an in-line spark tester to tell whether you get spark and fuel pulses during cranking. If not the common issues are the flywheel sensors or the DME itself.


Cheers,
Ingo