Reply to "UPDATED - Backfire under Low RPM / Load (4th or 5th Gear)....."

rockyMember

I agree on the carb stud - I will work to get that fixed. Good call.

Here's the latest report.

1) Full visual inspection (OK)
2) Tightened Carb Base Bolts
3) Reset Ignition Timing (was 14* set to 16*)
4) Verified Float Levels in both bowls (OK)
5) Verified Hoses / Plugs / Caps Tight

Took it for a spin.

I seem to have solved the "stumble", but I can still make it "cough" (backfire) with low RPM, high Gear (4th or 5th), giving it gas.

I am thinking that I may have had a vacuum leak (since corrected), but this backfire is something else again?

Thanks everyone for the interest, and the helpful suggestions.

4/11/168:05 PM

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