Howdy. As the subject suggests, I have a 1987 Suburban. I am currently having a no spark problem. I had the ignition module and the coil tested at autozone and they were fine. The coils is getting power (12v as tested with my cheap volt ohm meter. When I pulled the ignition module out, the connector for the pickup coil disintegrated in my fingers. I pulled the distributor and replaced the pickup coil and put it all back together. No go. So, on a whim I put a new coil in, since I've heard of coils testing ok but not being powerful enough to give a spark. Still no go.

At this point the only thing I can think of is that the wiring has a fault and while it is giving 12v there is not enough current to produce a spark. The only other thing I can think of is that the ignition module isn't triggering the coil correctly. I checked resistance on the cable that goes from the module to the coil.

ANY help is appreciated.

 

You had the ignitionmodule checked at Autozone ??? I certainly wouldn't trust them.

Is your vehicle carburated or injected ??

 

You were right. The ignition module was indeed bad. An acquaintance of mine is a pro mechanic. I had him come over and scope everything out. The a/d converter in the module went out according to a technical reference he had. So, it runs now and because the timing is correct now it runs better than before.