1994 C1500 4.3liter Injector Pulse

[JHynes]

I Have No Injector Pulse, Fuel Psi Is Good, And The Fuse Is Good.
Was Told That Ignition Control Modules And Computers Are Real Big Problems With Them. Changed Both Still Nothing Has Anyone Had Any Wiring Problems With Them And Where Was Trhe Break Or Chaffed Wire.

[2000CAYukon]

The pickup coil generates an ac signal (as the dist turns) that is converted to a dc signal by the ignition module. This dc signal is used by the ecm to create the injector pulse.

Therefore, you need to check pickup coil, ignition module and even the ECM. The ground for the injectors is either at the intake manifold or tstat housing so check for a bad ground there.

You can put a vom meter on ac voltage on the pickup coil and turn the engine over to see if it is working. I don't have the specs in front of me but they do go bad over time. The housing cracks and the coil corrodes.

//2000CAYukon