Getting backfire at idle or low gear but not at high gear. 1927 T doctors coup. I read it might be valve or air adjustment. Why only low gear if valve?
If it is backfiring through the carb only at low speed and Idle, I suspect an air leak, check the carb and intake gasket sealing. As the engine speeds up, the air leak becomes a smaller percentage of the total airflow and the backfire goes away.
1 Like
Thanks for advice. I have the gaskets. Will put them in