Hi, I`m Lubo, from Bulgaria ( Eastern Europe). I`m from Bulgarian Mazda Owners Club. I have RX-7 FC TII 1988 182hp. I have problem with my car and want to asking you for this.
Before one mounth I have problem with loosing the water. Problem was gasket on intake manifold. I replese this gasket ( very hard work, because I remove motor for this operation). After change everything was ok. But now, one week after this, I have other problem. When engine is cold, was no problem to start. But when I drive some km., and stop, after that I cant start the engine. If car stay half of hour or more, afret that is no problem to start. If I try to start the car, when somebody push me at back, car start without problem.
I change battery ( new with 72ah), new spark plugs ( Ngk bur7eqP and bur9eqP – new), new water cap with gasket ( and new antifreeze mixture), and some other things, but with no result. This problem`s from 4-5 days and I cant understaend wats the problem. I check electrical, and don’t found something in problem.
I cant undestaend, why car start without problem when somebody push me at back, and when is cold, and when is hot – engine don’t start ( starter work without problem).
Is that possible problem to be fuel pump, or injector ( someone from injector not to stop when I stop the engine, and make benzin in spark plugs?), or may be ecu?
Please someone to help if know what can be the problem. Now I driving my car from two years, and to this moment I repair everything on my car, but now I don’t know whats the problem.
Other, I wait new parts for my project – full exhaust system 80mm., re-amemiya ecu, bov apexi, cold air intake and other, and cant making anything when my engine is with this problem.
Beforehand thanks, wait your answer friends, and excuse me for my English!

 

You should do a compression test because engines with low compression often have hot start problems.

 

does it put out white smoke after hot starts(if you can get it started)?

 

I would say a faulty injector. If you can get a friend to help you out, try this. In the back hatch by the rear driver strut tower theres a connector coming from the fuel pump. unhook it and crank your car over. After a few seconds of cranking it have a friend plug it back in (while your cranking still) and see if it starts.

 

floor the gas pedal while cranking....it worked for me...

 

+1

 

I'd do a compression test but if you do have problems starting it pull the egi fuse and crank the engine for 15sec then put the fuse back in and try to start it.

 

most likely you either have:

dirty fuel injectors, which will have to be removed and cleaned professionally

a low compression motor, which will have to be rebuilt

 

I also think that you should do a compression check, if your compression is good you should get your injectors cleaned.