Misfire/stall Fiat 124 Spider


Asked by Mar 18, 2016 at 01:12 PM about the 1977 Fiat 124 Spider

Question type: Maintenance & Repair

Shortly after gassing up and cruising at about 70 mph, my Fiat 124 Spider misfired, backfired and stalled out.  When that has happened in the past it has been because of an over-heated ignition coil.  I carry an extra and when I have replaced it, the car starts immediately and runs well.  This time, not.  Had to get a tow home.  The car will start and run for a few moments, misfire, with the tach jumping, and stall and refuse to start for some time.  The battery charge indicator does not come on when the key is on, however, the battery seems to be holding a good charge.  I've used dry-gas just to make sure the recent fill-up wasn't at fault and have put in a new coil.  Any suggested diagnoses would be appreciated.

3 Answers


Are you still running points and condenser or solid state ignition?

1 out of 1 people think this is helpful.

converted to electronic ignition years ago.


Ok then look for the spark control module and replace it, next check the voltage going to your coil it should be around 9 volts at the positive connector at the coil, if battery voltage then that is why your coil is running hot, install a ballast resistor in the coil power wire to drop the voltage to the 9 volts, a parts store should stock one. The charge light has too operate for the charging system to operate properly, it might be ok now but soon it won't. HTH

1 out of 1 people think this is helpful.

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