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Message: [QUOTE="Gary, post: 717954, member: 675"] Ok, so when it drop below 900 rpm sync switches to No, I'd say that means your loosing CMP or CKP, I know CMP specs says 800-1000 ohms, I once had a no-start and the CMP was 830 ohms so it was with in specs but that was the problem. What are your ohm readings on the CMP and CKP?, I'd check them at the sensor and PCM. I think loosing the sync is your problem, the engine has to have both signals so it knows where its at in the firing order - because 720 of crank=360* of cam rotation, IDK if that makes sense to you??? basically its compairing the position of the cam to the crank so it can tell if a cylinder is on compression or exhaust stroke. Hmmm... But it has to see sync when cranking to start and you have that or it wont start.. [/QUOTE]

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