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Ted G.
Ted G., ASE Certified Technician
Category: Car
Satisfied Customers: 6089
Experience:  20 years auto repair experience, ASE Master Tech, Mechanical Failure consultant, Expert Witness
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1985 mazda: stalled..rotor, cap, plugs and wires and still wont start

Resolved Question:

i have a 1985 mazda rx7 and was running then stalled out, it acted like it ran out of gas and now wont restart. I have verified that there is gas up to the engine, spark at the plugs. I have also replaced rotor, cap, plugs and wires and still wont start. It acts like it wants to start but nothing.......
Submitted: 8 years ago.
Category: Car
Expert:  Ted G. replied 8 years ago.
You need to check compression. As you probably know, the weak link in a rotary engine is the Apex seals. They get carbon build up and will stick in the end of the rotor. If the compression is low, in many cases you can sometimes free them up by spraying a decarb solution in the plug holes and letting it sit. Also make sure the battery is fully topped off and the motor spins well when trying to start, slow cranking will just flood it.
Customer: replied 8 years ago.
Reply to Ted G.'s Post: i found on the web that rx7 flood easy and to do the following:
disconnect the coil
remove the plugs
crank engine with the gas pedal floored
put 1oz of AT fluid in the bottom two spark plugs
put plugs back in
reconnect coil
start normal with no pedal?
Customer: replied 8 years ago.
what should the compression be?
Expert:  Ted G. replied 8 years ago.

It needs to be at least 90 psi. You will likely find one really low or all of them somewhat low.

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