Ignition coil suddenly stopped sparking on any cylinder

Tiny
ANTHONY CAVE
  • MEMBER
  • 1997 MAZDA MX5
  • 0.8L
  • 4 CYL
  • 2WD
  • MANUAL
  • 95,000 MILES
The car had been working fine for years, then suddenly, for no apparent reason the coil suddenly stopped producing a spark, is the normal and how can I check the coil to see if it has given up the ghost. As a side not, the exhaust, which im about to change, rotted at the rear end so I have been running it without the rear silencer for the last couple of weeks so is running rich, could that be a factor. Would really appreciate soem help, im good wityh machanics, not so good with electrcs?
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Sunday, May 5th, 2019 AT 11:14 AM

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Tiny
SCGRANTURISMO
  • EXPERT
Hello,

This could be a problem with your vehicle's Crankshaft Position Sensor(CKP). Your vehicle's CKP is responsible for sending a signal to your vehicle's Powertrain Control Module(PCM) giving it the rotational speed of the crankshaft. This is used for engine rpm's and for misfire monitoring. Without this signal the PCM will not know the engine is turning over and won't start it. In the diagrams down below I have included factory description and testing and adjustment procedure for your vehicle's CKP sensor. Please go through these guides and get back to us with what you are able to find out.

Thanks,
Alex
2CarPros
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Sunday, May 5th, 2019 AT 10:34 PM

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