Engine Performance problem
1994 Mazda Miata 4 cyl Two Wheel Drive Automatic
the car wont crank in park but will in neutral. While driving it tries to stall. The tachometer is on zero with engine running. When engine tries to stall the check engine light come on and the tachometer jumps to around idle. About 1100 to 1500 rpms. We just had a new catalytic converter installed 8-29-09. These problems started 9-15-09.