Truck cranks but wont fire

[quote:83a2a13f58="cbarmby"]I have a 1988 GMC Sierra. It has been hard to start after sitting for a while, this started happening about 2 months ago. No big deal. But today I went to the store and I had nothing when I tried to start it. So I wiggled my positive wire. Then it started. When I got to the store I turned my truck off. When I came back out it would turn but not fire. I have a cheap code reader and it told me Diagnostic Problem, no signal from distributer to ecm. Can you tell me what my problem possibly is. Thank You[/quote:83a2a13f58]

Try checking the coil, ignition control module and Crankshaft/Camshaft sensors.

This may seem silly, but I had a similar problem a while back. Ended up replacing about everything only to find out it was a $14 battery cable causing the problem. The "wiggling" of the wire made me remember that. IMO not a waste of money. Good luck.