i have a 93 GMC Jimmy it has no spark. I put a new coil,dis-cap button and new ign-pickup in the distributor. still no spark. can someone help me? 4.3 vorteck

The local Auto parts store can do a test on your ignition control module.

put in new ignition control module. still no spark. and i put in a new brain box.
any input would be helpful.

What about fuse's, or security system?
Is there a battery getting to the ignition parts?

New parts!
New ignition pickup
New ignition module

If the orginal ignition module was bad, it could of shorted and blown a fuse.

could a bad fuel pump stop it from firing?
like a safety switch.

Newer cars might have a safety switch to disable the electric fuel pump when the gas is low, this help to prevent the fuel pump from burning up.

1) Have the local auto parts store test your ignition module.
2) Check the fuse going to the ignition module.

Was the magnetic pickup coil replaced in the distributer?

yes the magnetic picup is what i put under the dis-cap.

There is no fp shutoff on this truck.

The pink wire at the ignition coil must have battery voltage any time the ignition is in the RUN or CRANK position.

The white wire at the ignition coil should pulse while cranking.

Check both pink and white wires at the module connection for the same results.

Post your results.

got your note. will check it tomoro and let you know.
thanks.