K1500 NO SPARK

1989 GMC Truck

Tiny

Darrin A

April, 6, 2010 AT 11:25 AM

Electrical problem
1989 GMC Truck V8 Four Wheel Drive Manual

While driving, my truck just shut down. I have no spark. I replaced the plugs, wires, Dist. Cap, rotor, ICM and coil. I have 12v at the coil and still no spark. Could it be the PCM or the ECM?

FOUND 2772 RELATED QUESTIONS

9 Answers

Tiny

rasmataz

April, 6, 2010 AT 11:31 AM

Test the distributor pick-up coil.

Tiny

Darrin A

April, 6, 2010 AT 11:35 AM

Where is that located and how do you test it. Just so you are aware, I have noone to help today.

Tiny

rasmataz

April, 6, 2010 AT 1:00 PM

Its inside the distributor

Tiny

Darrin A

April, 6, 2010 AT 1:08 PM

The only thing inside the distributor is the rotor and the ICM, have replaced both of them

Tiny

rasmataz

April, 6, 2010 AT 1:16 PM

Disconnect the 2 wire connector that connects to the ignition module and using an OHM meter probe the disconnected 2 wire electrical connector that goes to the PICKUP COIL and you should have an OHM reading of 500 to 1500 ohms.

Also check each lead of the pickup coil to be sure that neither wire is shorted to ground.

Tiny

Darrin A

April, 7, 2010 AT 2:15 PM

All that seems to be fine

Tiny

rasmataz

April, 7, 2010 AT 3:48 PM

Where are you checking for spark? Coil or the plugwire end

Tiny

Darrin A

April, 7, 2010 AT 11:44 PM

At the spark plug

Tiny

rasmataz

April, 8, 2010 AT 12:08 AM

Check it at the coil side

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