Resolved 420a not getting spark

[Brian O Conner]

It just randomly started not getting any spark out of the coil pack.

I put on new Crankshaft positioning sensor and that was not the problem. Car for some reason as well is not throwing codes. Camshaft Positioning sensor is reading the right voltage but I am getting conflicting statements on the Crankshaft Positioning sensor voltages on here on what the voltage should be.

I have put the stock coil pack back on to help rule that out and have used my spark plug wire light and my hand to double check I am not getting spark.

Any ideas?

 

[Brian O Conner]

So it ended up being a broken crankshaft positioning wire.

A lot of people change out all the sensors then the ASD relay and end up changing the ECU. I read like 6 threads to the point that most people never got there problem fixed and went MIA.

When checking the Crankshaft Position sensor plug there's 3 ports, a power wire 5-8 volts, a ground wire, and the signal wire. I used a test light from the positive post to check the ground port in the middle. If it the light turns on you got a ground if not there's a break in the line or a power wire touching the wire somewhere.

The signal wire can only be tested with the Crankshaft Position sensor hooked up and I would test the wire as close to the ECM pin as possible. You would need 2 people, someone cranking it by hand and another person spliced into the signal wire, and throughout the rotation it should show voltage changing. If it doesn't then there's a break in the wire which was my scenario or you have a bad Crankshaft Position sensor.

This was the best test I found make sure to read the pictures I am posting up.

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[aboomin]

yea im sorry i was in the same hole as you searching threads and losing my sanity for months but glad u fixed it i replied on my thread on what happened