MSP hot start issues

Brooksie · Apr 25, 2017

I have a speed protege with a forged bottom end and a freshly rebuilt head. It cold starts fine but after it heats up, it will not start. It turns over good but will not start. However if I push start it, it will fire up no problem. The battery, alternator and starter are new. Mods are fmic with hard pipes, ssafc, radiator upgrade, 3inch exhaust.

MrDiggler · Apr 29, 2017

Wondering if it could be vapor locking somewhere, but the fact that it will push start throws me on this.

hornsfan10609 · Apr 30, 2017

Never really seen this problem personally but the FPR solenoid with the brown connector's sole purpose is to prevent vapor lock on hot starts. Is it connected? If so it may be bad. They typically will throw a CEL when they fail.

Brooksie · May 19, 2017

I have a neural switch code and thats it. I am getting fuel but no spark. Cold starts perfectly. Or right after I shut it off it will start up no problem. But if you let it sit a few minutes, might as well wait an hour before it will fire up again.

MSP hot start issues

Brooksie

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MrDiggler

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hornsfan10609

Certified Mazda Tech

Brooksie

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