Info needed: 67 M38A1 CDN 2 Backfire

[Mike K]

Originally Posted by Les Kovacs

Started jeep up after two weeks vacation....+30C temp in garage...crank but no start after 3-4 seconds (unusually starts first crank)....tried a second time-crank but no start after 2-3 seconds.....then I put on the choked thinking that fuel may have evaporated from carb....cranked then backfired once and then it started. Why the backfire.

Thanks in advance,

les

A guess. There might have been unburnt fuel in the exhaust manifold , the fuel ignited and then a bang .