Mazda Repair: intermitant fault, piston rings, excess fuel

Question
QUESTION: hi,91 mazda a3 with b5 engine.sometimes wont start,strong smell of fuel.when trying to start fires until key is released.keep cranking and will start.runs good when going.then can have same problem,sometimes stalls

ANSWER: check the feul system you may have a clogged fuel/air filter or the injectors are leaking start simple.

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QUESTION: hi again.if injectors were leaking or filter blocked wouldnt it be contiuos.note when it would not start i removed fuel hose into injectors,good flow and relay good.started ok without fuel hose on for few seconds.could it be fuel regulator valve.has spark at plugs at all times.thanks

Answer
i leaking injector would leak down when sitting and cause a hard start no start because of the excess fuel in the combustion canber. same with and cloged filter engines need more fuel during start-up so if it's clogged it might not supply the proper amount during start-up and cycle the key would continuely try and add more fuel. filters are cheap any easy to replace and a good maintance routen and should be done ever 100000+km sometimes you can tell if the injectors are leaking by cheaking the oil see if ie's thined out and has a gas smell. sometimes it'll leak down past the piston rings and into the engine oil