Spark at coil but not at plugs. - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 07-25-2016
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Spark at coil but not at plugs.

I have a 1994 Ford Ranger and the coil wire going to the distributor has electricity going through it but when I pull a plug to check for spark, there is no spark. I was involved in a fender bender when it happened but it did almost no damage to my front end. I am not sure if I might have tripped something. I checked the button under the passenger floor carpet and it is fully depressed but I think this is a fuel shut off anyway not an electrical shutoff.

Thanks.
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Old 07-25-2016
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Sorry, I have to ask, when you check for spark at the actual plug, are you grounding the outside of the plug ?
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Old 07-25-2016
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Welcome to the forum

Guessing 3.0l engine???

I think '94 3.0l was the last/only ranger with distributor.

Pop the distributor cap and see if rotor is turning.

Easiest thing to do is to add fuel to the intake, spray in some gas or ether(quick start) and see if it starts.
If it starts and dies spark is good fuel is bad
If it doesn't start the spark is bad.

If no spark check connection on TFI module on the side of distributor, unplug it and plug it back in.
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Old 07-26-2016
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3.0 liter. I have 12 volts at coil and hooked a spark plug up directly to coil and no spark. Rotor is spinning. When I hook a multimeter up to the coil and crank, no change.
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Old 07-26-2016
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TFI module then or its wires
Go here: Ford EEC-IV/TFI-IV Electronic Engine Control Troubleshooting

print the worksheet and do the voltage OHMs test

TFI module gets pulse from sensor in the distributor, Module then pulses Coil(grounds it) to generate spark.

Coils get 12v when key is on, the Ground(-) is what pulses on and off to cause the coil to spark, has always been that way, the old points setup in a distributor was the Ground for the coil, opened and closed to ground and unground the coil.
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