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Old 12-26-2010, 02:33 PM   #13
big_windy
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Join Date: Dec 2010
Location: Hopkinsville, Kentucky
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Re: '00 4.3ltr blazer won't start

Old Master, I've gne through all your questions and verfied / Re-checked all the conditions. I'm thankfull for your patience while I continue to fumble through diagnosing this job, and hope we can isolate the problem. Trying to stay on "track" I'll list my findings in the order you asked (more or less) I'll list the ohms readings got using the 200 scale on my meter...

Battery voltage is present on all pink wires at CKP, Coil & Module.

Test light gets no illumination on wht/blk striped wire at coil any key position on, off or while cranking. End to end this wire shows 00.4ohms from module connector to coil connector and infinite resistance (Open) to ground.

The CKP wiring, and white #423, all show from 00.4 - 00.9ohms end to end, and infinite resistance to ground. (open)

With PCM hooked back up, White wire #423 shows constant ground by solid illumination of test light all key positions, but no pulse while cranking.

With PCM hooked back up, PPL #574 shows 00.2 ohms to ground.

One question here, with key off and coil connctor plugged in I get test light illumination and 00.4 ohms resistance at module connector wht/blk socket from coil pink wire. Is this right?

I pulled the CKP, wrenched the crank slightly to ensure poper position of reluctor wheel for another measurement and it still shows a .1" or 2.5mm air gap. wheel looks right, centered on well, and tight with no aparent damage. Re-seated sensor, plugged everything back n and still no spark. I might check to ensure I got the correct CKP upon replacement? And start shopping around for a garage that can help me with CKP re-learn and new passkey re-learn?

Suggestions?

Last edited by big_windy; 12-26-2010 at 02:35 PM. Reason: limit confusion
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