Hi Guys

Yesterday i found My B310 was not pulling properly, engine hesitates felt like an ignition issue, Pulled the Distributor cap and rotar and found rotar had some black burn marks,
Sanded it and cleaned the rotor,cleaned the plugs and plug wires and distributor cap and contact point too and also re gapped them according to the B310 Manual

Spark Plugs 0.8-0.9 MM
Contact Point 0.45-o.55 MM
and installed them and started the car with choke fully closed position, it ran little better than yesterday but when the engine got hot it started to backfire horribly,
Checked the choke it was open completely
checked the carb float level it was perfect

what could be the issue ,is backfiring because contact point too low or too far ?
Check these Spark Plugs too
thanks
regards
sumith

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