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Crankshaft Position Sensor Help

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Old Feb 13, 2006 | 10:33 PM
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Default Crankshaft Position Sensor Help

I am looking for some help on crankshaft position sensors. I am getting some really wierd behavior out of my ignition system on a 2002 5.3L conversion into a 1986 chevy pickup. I hooked a timing light up to cylinder 1, and noticed that it was not firing every cycle consistently during starting. The truck doesn't run at the moment, so I was wondering if on the 4th cycle I don't get a spark, would it be due to a weak battery. The battery is still cranking the motor over a constant speed, so I would think it wouldn't be the battery. It is consistenly every 4th revolution of the motor. My next step is to check the square wave of the Crankshaft position sensor. And also the camshaft position sensor. The truck ran two weeks ago in open loop beautifully, and now I can't get it to start. If anyone has any suggestions please let me know.

Thank you,
Landon00
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Old Feb 15, 2006 | 07:46 PM
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Lets try this over here.
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