GMC Repair: ignition problems, crank sensor, gmc suburban

Question
my 90 gmc suburban shut off going down road  i tried to  restart it but no success i  was getting no  fire i  replaced the modular, coil ,and cap and rotor i am getting some voltage out of coil wire but nothing out of the cap there is 12.4 volts going into  the coil when i  turn it over i  get about 9.2 volts at coil wire

Answer
Your coil voltages at the POSITIVE side of the coil terminal appear to be OK. Did you perform the test procedures on the coil itself ?.

Did you perform the test procedures on the crank sensor ?.

You stated MODUALTOR, Did you mean IGNITION MODULE ?.

You need some basic electrical test procedures to perform the above tests using an OHM meter.



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