Timing and Firing Orders
Chevy Silverado
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You have a 90 f-150 302 new distributor has been timed but is misfireing when put in gear?

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2006-07-04 21:11:01
2006-07-04 21:11:01

If this is the same problem that you had before new dist, may be different problem. Check plug wires, be sure going to correct cylinder. Check firing order, 302's have two different firing orders. Carb'd or injected? Look for vacumn leaks around manifold. Spray carb cleaner around manifold while idleing. If rpms go up, you have a leak.

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