Mazda Repair Questions? Ask Mechanics for Answers ASAP
Thank you for your question, my name is ***** ***** I am a fully qualified vehicle technician with over thirty years in the trade, hopefully i can help.
The problem does sound more like an engine management fault that the car actually over heating.
The most likely candidates are the crankshaft sensor or the fuel pump relay. As your MX5 has individual coil packs this can be discounted, but vehicles with a single coil pack can suffer with this problem due to the coil failure.
There is also a relay in the main under bonnet fuse box which controls the ignition circuits, but I would go for the crankshaft sensor first.
I hope this answers your question but do please feel free to ask any further details by replying to this thread.
Your welcome, if you need any further details and I can help just reply to this thread.