Looks VERY Sharp.

What plugs do you have in the engine?

Verify coil resistances. Should be 0-1.4 across primary circuit, 11,000 to 15,000 to secondary.

 

Originally we had some NGK iridium plugs, but I switched those out for some Autolite copper plugs. I spoke with the company who makes the coils, and they sent out a replacement set. I never checked the resistances, but I wouldn't imagine that 2 sets of coil packs would both be bad. I will check that once I get the truck back from the shop.

 

What rims you have on there? I like those......

What brand crank sensor is in the truck? Does the shop have an oscilloscope by any chance?

 

The rims are steel rims off of a 2012 ram 2500, I got a great deal on them with the tires. I have no idea what crank sensor it has in it. Whatever is in there is at least 10 years old, do you think that might be the issue? I can ask the shop about an oscilloscope, what would you recommend checking with it?

 

Take a look at signal output on the cam, and crank sensors. Should be a very nice, consistent, square-wave. if it isn't, that may be at least part of the problem.

 

I just called the shop, they have given up saying that they believe that the coil packs just aren't compatible with the truck, and they don't have much OBDI capability in order to properly find a solution. On a good note, they aren't charging anything for their research time.

 

Not compatible? Its a friggin' coil, they all work the same way. Apply a voltage, then remove it, as the magnetic field collapses in the primary windings, it creates current in the secondary windings, thus, firing the coil. The PCM is just switching various coils on and off. That's what the modules are for. So far as I know, the wires from the PCM are one power supply line, and then separate grounds for each coil... PCM controls them by switching the ground. So, unless the pcm is firing the wrong coil, it should work just fine.

Now, with the code 43.... it's entirely possible that the coils are a different resistance than what the PCM expects.... but, that would only apply to primary resistance.

I don't think OBDI has specific cylinder misfire codes........

 

I'm still working with Davis Unified Ignition to see what we can figure out. I will check the primary resistance and see where it stands, but I imagine that is fine. Would a higher output coil pack require more current? Should I run a relay for the 12 volt input so that I can run a larger wire from the battery to the coil pack? I know very little about electrical stuff.

 

Somehow I duplicated this post, hit the edit/delete button but can't find a delete option. Sorry for the duplicate!

 

I don't think its really necessary. Check the coils, see what you find.