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Old 03-28-2008, 04:33 PM
2000CAYukon 2000CAYukon is offline
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Re: How to set ignition timing for a 1990 silverado chevy c1500 305 engine?

On the passenger side firewall, there is a black cover over the power distribution block. Remove the cover and look for a black wire with a tan strip. It should have a connector, disconnect it and set the timing to 0. Reconnect the wire.

If it is back firing, it could be a due to a lean condition. Replace the fuel filter if it has not been replaced recently.

//2000CAYukon
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