Just realized that I was being a moron and measuring the resistance from the connector to the coil; took the coil off and got 14.76k Ohms on the primary and secondary wire connections to the brass tip. Regardless it seems like I need to order an OEM one.

 

Please let us know if changing the coil fixes the issue.

 

Will do! I'm gonna order one tonight or tomorrow morning at the latest and I'll post an update once I receive and install it.

 

So I ordered an OEM ignition coil as well as a "performance" model just for testing purposes. I received both last night and tested them on my workbench and will be installing them today but it appears they both have primary and secondary resistances that are in line with what I presume is my busted ignition coil. All of the following measurements were taken at around 70* ambient temperature and I used an alligator clip on the primary and secondary connectors as to ensure I wasn't accidentally touching both with the multimeter lead; the Duralast ignition coil that was on the truck now measures 13.5k Ohms on both primary and secondary (previously 14.76k, might've been a bit warmer than 70* as the truck had been driven within the last hour prior to testing), the "performance" coil measures 14.12k Ohms on the primary and 14.11k on the secondary, and the new Mopar coil measured 13.46k Ohms on both the primary and the secondary.

Unless I'm incorrectly measuring the resistance on these I'm not sure how both of the new units and my old one are all supposedly duds? When I get off of work this evening I'm going to pop in the new one(s) and take the truck for a spin to see if there's any noticeable difference, and report back.

 

I swapped in the new Mopar ignition coil and my odd issue with the engine wanting to choke out after getting to temperature while in park seems to have been solved, but I still don't get more than 61.2% throttle position at highway speeds. These are some live data snippets from a cold start to idle, a bit of city driving, and accelerating on the highway. I was able to get the engine up to ~5200 RPM (83.9% calculated engine load according to my live data) while going up a hill in third (I believe, as I let off the gas a smidge the transmission upshifted), but can't seem to get full response while in fourth and at highway speeds.

My transmission was just rebuilt, with how late it shifted into third and seeing as I seemingly can get near full engine response in other gears (including park), could it be an issue worth taking it by the shop that rebuilt it?

 

I don't think it's a trans issue.....

Measure input voltage to the TPS, and then measure signal voltage as you open the throttle.

 

I'll hopefully be able to check this later today.

Would it be possible it is the fuel sync? I set it manually with the distributor to get the truck running but haven't yet taken it into a shop as the few I've gone to and recently got pricing from apparently had no idea what I was talking about when I actually showed up.

 

I was told by a tuner that only seeing ~75% throttle is normal.

 

Just out of curiosity if you remove the TPS from the throttle body and manually turn it with just the key on not running, what throttle readings can you get out of it?

 

One thing that just hit me, are you in 3rd at 5200rpm? Depending on gearing/tire size that would be 105-125mph.