Mazda RX-7 Problem Report
Mazda RX-7 Engine Surges, Hesitates, Non-Turbo model
If the engine surges and hesitates, our technicians recommend checking the condition of the ground on top of the engine block, under the intake. Restore the grounding point if it is found to be corroded or compromised.
If the engine intermittently does not start and is cranking OK, it may be the main relay is def...