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no spark

Tests for Thunderbolt Ignition:


With the ignition key ON, AND BILGE WELL VENTILATED OF GAS FUMES!!!

#1 - Connect your voltmeter neg. lead to the engine ground and pos. lead to the white/red wire terminal at the dist. It should read 12 volts.

#2 - If 12 volts is present remove the coil wire from the distributor cap and connect it to a spark gap tester to ground.

Remove the white/green lead from the dist. terminal. Turn the ign. key to on and strike the white/green lead to ground. If there is spark, replace the ignition sensor in the dist.

#3 - If there is no spark, substitute a new coil and repeat test

#4. Now if you get spark, install a new coil. NO SPARK, replace ign. amp.

#5 - In #2, if there is No voltage present, disconnect the white/red wire and check it again for 12 volts. If 12 volts is present, replace the ignition sensor inside the dist. cap. If no 12 volts present w/it disconnected--ignition timing module (amplifier) is shot and must be replaced.
 
If you are touching the green and white wire disconnected from the distributor sensor that goes to the timing module. Touching tapping that wire which comes from timing module to a good ground with the key on should generate a park coming out of the high voltage wire going from coil to center of dist cap... remove high tension wire from center of cap and connect spark checker to it.

If no spark when tapping green/white wire then sensor in distributor is bad.
 
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