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What would cause a 1985 Jimmy not to fire after setting the timing when it was firing before checking it?

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2005-11-14 00:25:10
2005-11-14 00:25:10

If you over or under advanced the timing that's all it would take. Been there done that. Did you loosen distributor cap? Make sure it is seated. Did you replace any wires? Check the firing order if so. Retrace your work, but chances are your timing was just bumped to far so try this: have someone crank motor while you slowly turn distributor and it should start if nothing else was changed. Good luck. I hope this helps you, Mark

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