The Mustard Nugget

Doubt it*s a fuse as the car will start - just takes a longer cranking period to get it going.
 
Check your pressure regulator solenoid valve.
The fuel pressure needs to be different for a hot start and if the PRC isn't operating properly you won't get it started.

You may have a week fuel pump or one that's losing pressure.
Try putting your key in run position and wait about ten seconds before you turnover the engine.

Here's a thread with similar issues...

https://www.mazdas247.com/forum/showthread.php?123863408-Trouble-Starting-and-P0171-ECM-CEL
 
Make sure you check your ECT sensor (engine coolant temperature)

One guy had a problem with hot starts and he found that his sensor was covered in crap.
He cleaned it off with a wire wheel on a drill and the problems stopped.

The crap on the sensor was giving a false reading to the ECU so it didn't try a hot start.
 
Thanks pcb! I suspect it*s the fuel pump. I had similar issues with my Alfas in the past...well...any issue I*ve had with any car, I*ve had with my Alfas.

Thanks for the heads up on the other fixes though - I*ll check them out.
 
So I got tired of trying to chase down the problem and sent the car off to MX5 Mania - they are really MX5 (Miata) specialists but know the Mazda family of cars quite well.

Turns out if was a low fuel pressure issue - fuel pump and filter changed, all good!

Im also changing out the rear resonator for a proper muffler. It was just much too loud! Will hopefully get the car back before the weekend so my son and I can go out for runs again!
 
I*m guessing the clutch plate is ageing and the clutch is probably wearing (though not slipping) - the car is closing in on 300,000kms which is 180,000+miles.

Which got me thinking, might as well put in a lightweight flywheel if I*m going to change the clutch!

So the question is, has anyone weighed the stock flywheel? Google tells me its 18lbs (~8kg). If that is the case, It would make a huge difference if I go for a 12.7lb (5.8kg) flywheel. There*s a lighter one at 9.5lb (4.3kg) but I think that*ll start to affect driveability.

I*ve had lightened flywheels on quite a few of my cars now and have always enjoyed how lively they feel...especially since changing the final drive won*t a great for fuel economy on these cars.
 
Well...it was a short-lived experience. I bought and fitted a pair of WRX seats, was contemplating doing the clutch along with lightened flywheel or coilovers.

Then a mate needed a runabout...so I sold the Mustard Nugget.

Thanks everyone for the great, but brief experience. I might check in every now and then, but in the meantime, safe travels!
 
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