If the engine intermittently does not start and is cranking OK, it may be the main relay is defective. The main relay can corrode and fail, requiring replacement.
Resources for the Repair and Maintenance of your 1991 Mazda RX-7
1991 Mazda RX-7
1991 Mazda RX-7 Problems
If the ABS light is on intermittently, it may be due to a loose ABS ring on the rear axle. If a loose ABS ring is found during inspection, replacement of the ABS ring and affected drive axle may be necessary.
An oil leak can develop at the rear stationary gear seal and O-ring, at the rear of the engine. Our technicians report that transmission removal is required to gain access to the components.
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.
1991 Mazda RX-7 Recalls (Recent)
1991 Mazda RX-7 Questions and Answers
The rear window wiper stopped working, checked the fuse, would it be the switch or wiper motor?