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68gmsee · 11-07-2017, 12:35 PM

Since you say it was running before the rewiring, concentrate on that. As mentioned above, timing should be checked. An engine needs proper amount of fuel, good compression, ignition and correct timing to run.

The basics:
-check to make sure you're getting fuel and not flooding.
-place #1 cylinder at TDC on compression stroke.
-insure timing mark lines up with TDC (or 0).
-double check firing order clockwise 1,8,4,3,6,5,7,2
-insure you get spark to spark plugs.

11-07-2017, 12:35 PM	#3
68gmsee Active Member Join Date: Jul 2007 Location: Centrally located between Houston, Austin and Waco. BCS area. Posts: 7,947	Re: Motor hard to start, runs for a couple seconds then dies, backfires through intak Since you say it was running before the rewiring, concentrate on that. As mentioned above, timing should be checked. An engine needs proper amount of fuel, good compression, ignition and correct timing to run. The basics: -check to make sure you're getting fuel and not flooding. -place #1 cylinder at TDC on compression stroke. -insure timing mark lines up with TDC (or 0). -double check firing order clockwise 1,8,4,3,6,5,7,2 -insure you get spark to spark plugs. __________________ 68 GMC 250/3 speed Saginaw p/b p/s 69 Chevy 350/350 currently in pieces still lookin for a cab 06 Trailblazer I just want a vehicle that I can work on, that won't talk to me, leave error msgs or keep track of how I drive...