1987 Mazda RX7 Car will not start

1987 MAZDA RX7
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EUGENEPK
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Engine Performance problem
1987 Mazda RX7 Two Wheel Drive Manual 120000 miles

Car will not start but will crank. Had car at Mazda dealer. Test showed good compression; new plugs. had thermostat & accelerator sensors replaced. worked fine for a month or 2 but now same problem
Aug 21, 2010 at 3:15 PM
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RASMATAZ
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Do below to determine if its a fuel or spark problem

Get a helper disconnect a sparkplug wire or 2 and ground it to the engine atleast 3/16 away from ground-have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs,coil's resistances,cap and rotor,distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it and keep testing
Aug 21, 2010 at 3:43 PM