back firing 253

[wbute]

Have you timed it with a timing light or just turned the dizzy?

[thatotherguy]

we drove it on the first day and it was running rough but wasnt back firing,firing order is the first thing i checked and i used a timing light, i thought if the timing was out it would back fire through the carby but it only back fires through the left exhaust and it does it hot or cold