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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: Buddy on October 26, 2010, 06:28:43 am
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I have an 85 with a 305 in it. I have just installed the motor.Somebody else did a rebuild on it before I got it. I cannot seem to get it to idle. Seems to run OK when I keep on the gas but every now and than it back fires and pops. I was i told it may be my timing? thoughts on-that anybody! my next question is I never have timed anything. I can get a timing light but have no idea how to do it. About all i know about timing is turning the distub one way or the other. Can someone post this in detail for me. Also I am not driving the truck at this time as it is no where near ready for the road.
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PM sent
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loosen the distributor bolt just enough to be able to move it slightly with resistance.
Put the timing light on #1 spark plug (drivers side front of the truck)
point it at the timing mark (where to put it depends on what you timing tab looks like)
If it is at 0 turn it to advance timing to 12 and start from there.