DDEC2 problems...missing and falling over iteself for 15 seconds.

With the fuse pulled out I should have no voltage on 1 side of the plug right? But instead there's 9.8v

 

Ok, I looked the truck over today, checked everything everyone sugested. I'm pretty sure it's the ecm. So that being said does anyone know somewhere to repair/replace a ddec2 ecm?

 

Thanks for the info. But the plot thickens lol

By some miracle I was able to locate a shop that had a ddec2 test ecm (they literally cut the tabs off the corner so you can't bolt it to the block)

Put it on the truck it ran great, had way better throttle response, actually sounded different as it ran.. I don't know if it's tuned differently, or what but the tone of the exhaust was definitely different. It only missed once or twice. But im checking that up to new computer, maybe I had air in the fuel lines from working on it, maybe the computer was adjusting to new perameters from the sensors I don't know. I just know it ran without acting crazy and actually took fuel (which it wouldn't before)

So I took the test ecm back off, and put mine on just as a "what if" type thing, and wouldn't you know it, truck ran just like it has for over a year now. No crazy misses. No weird electrical things, started in high idle, went down to normal idle even took fuel all the way up to red line.

I'm letting it set over night to make sure the problem doesn't arise overnight, if not I'll slap it back onto the truck, if it acts up again then I'm still thinking ecm.

If anyone is looking to have an ecm rebuilt I actually found a place in TX that does them. $650 for rebuild, don't know if they're any good, just throwing It out there that they still working on the old ones.

 

Today, the saga comes to an end. I am man enough to admit my faults. It was a ground issue.

When I removed the ecm I noticed the rubber grommets on the top 2 bolts were missing. Allowing the ecm to wiggle back and forth letting the ecm contact ground and lose ground constantly. When I used the test ecm I didn't mount it to the truck I just set it up on the axle and frame, which gave it its ground. Because when I put my ecm back on it didn't start again. So I connected a jumper cable to the ecm body then to ground. And voila! Issue solved.

So 3 added grounds later were good to go, thanks for all the suggestions and info!