Quote:
Originally Posted by mattdavis11
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That was an interesting read which I only skimmed.
-It looked like if the light comes on for three seconds and goes off with normal self test, the immobilizer is okay and something else in the ignition/cranking/fuel system is wrong.
-If the light comes on and stays on after three seconds it's a bunk immobilizer. (but I may have read it incorrectly)
You might want to start isolating:
Get a spark plug tester or inductive pickup or perhaps use OBD2 tester to look at firing line and see if there is actual spark or big pulse. It could be as simple as a bad coil.
Get a Noid light for the fuel injector. If it flashes while cranking, the cam/crank sensor and ecu is telling the fuel injector to fire. Those are 'probably' good. That cuts the problem in half.
If electronics and spark is good go on to fuel. Should be able to test line pressure off the schrader valve on the rail if equipped. See if there is bleedoff/leakdown after 5min which indicates leaking injectors or bad check valve. A plugged filter or pickup screen perhaps will cause low delivery pressure.