mustang backfiring and saw a flame shoot out of carburator, what does this mean?
Ok, sounds like you are or maybe dealing with more than one problem here. First: “IF” it is a holly carb, the moment it backfired through the carb it blew out the “Power Valve” (from memory on that thing). So you MUST replace that valve for it to run correct again (even if you fix the other problems). I used to keep 10 on hand just because of that. ANY backpressure in the manifold will blow those things. Second: Backfiring through the carb is one of three problems. 1) Timing – check the timing with a light (and check the vacuum advance as well – it should be PORTED vacuum not constant), IF the timing is right then; 2) Bad Points – check your points (from mem that “should” be a points dist) make sure they have the right dwell / gap; 3) Burnt or Cracked Valve – if the timing is correct then it is possible you have a burnt or cracked valve. You can do a leakdown test to check that. Also: After you replace the power valve, you need to reset the carb / and / you could have fouled plugs if y
