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68C15 · 03-22-2007, 10:02 PM

next question. is the unburned gas due to fuel delivery or ignition problems? bump the timing up by 4 degrees and retest. let me know if that changes anything.

03-22-2007, 10:02 PM	#9
68C15 blood type; Retumbo Join Date: Jan 2004 Location: next to my reloading bench Posts: 10,269	Re: Backfire next question. is the unburned gas due to fuel delivery or ignition problems? bump the timing up by 4 degrees and retest. let me know if that changes anything.