Another 870 thread- Engine vibration

[Chamberpains]

So you have codes active when you turn the key on? What are they? If it is a harness problem or a sensor problem it should throw a code.

Wrong wire in the wrong place = code
Missing wire to sensor or module = Open loop = code
Bad wire with to much or to little resistance = Open loop or reading out of spec = code

Give us a list of the Active codes. Then the list of the Inactive codes. We may see something that leads to Cranking with no start or a pattern that leads to it. Take a Screen shot of the Code screen from Insite while you have it hooked to the truck.

Here's a quick youtube on a generic way to screenshot using windows.

https://www.google.com/url?sa=t&rct=j&q=...RIY6CYOAUw

You can also get free snapshot applications online and use them.

As far as tuning your CM870, PM Unilevers or Mommaburt they have no problem hooking in and getting that ECM sorted out for sure.