Rough Idle, Codes Problem, Need Help

[dave_k96]

Ok, to start off, I'm completely new to Powerstrokes, so any help would be appreciated.

I have a 96 with 160k on the odometer. The truck had an edge 60hp EZ chip under the hood, and an Edge programmer on a 100hp tune in the cab when I bought it. I don't think that the stock injectors could keep up with both, so I took out the programmer. Cold starts, ( it's 5-20 degrees here in the south dakota in the winter) it starts and has a slight miss for about 10 seconds and then it evens out, but it would smoke for 10-15 minutes after starting it. I unplugged the 'ez' chip and it got a little better for a day or two, and started again.

I ran a contribution test and #3 po269 and #4 po272 were showing up. So, I swapped the #3 injector with #5 and ran the pickup for a few days. Later I ran another contribution test and 3 and 4 showed up again......So, I assume the injector is ok. The harness under the valve cover seemed ok, everything was connected.

I ran a buzz test and it gave me #3 p1273 Code, and wouldn't test any other. It seem kinda low on power too...Anything I should look for? How should I test the harness under the valve cover?

On another note, I get a po236 Turbo A circut code. The EBV is sticking.

I appreciate any input guys, thanks alot.

[rvrhauler95]

don't worry about the turbo code it happens when you have a chip and is common. on the valve covers you will have two plug in going into them one in the front and one in the back pull these plugins and inspect the terminals you might find some melt in the plug in or the gasket.
hopes this helps