From there, I moved on to the MSD Atomic Transmission Control Module (TCM). For some reason the TCM is constantly throwing error codes on the Throttle Position Sensor (TPS) side of things. MSD customer service is of zero help, infact I found them to be quite rude (same experience every time I've called in, today was not an isolated event). I find it shocking as they are owned by Holley, but with Holley its been amazing customer service! Today all he kept saying "perhaps you need to buy a new TCM" and after I pointed out it had a total of 1 miles so far, so if it needed replaced it was a warranty, all he could say was "I'm not sure what you want me to do..." Wow, guess he was done for Friday!
I decided to isolate the TCM from the Holley, to do so would require a separate TPS just for it. I decided I'd build a unit just for that purpose. I rounded up a TPS from a 1990 Firebird and set to work. Built a mounting bracket from some 14g stainless.
![Image](https://s31.postimg.cc/4twhh2bpn/20180504_120901.jpg)
![Image](https://s31.postimg.cc/mjy6244q3/20180504_121008.jpg)
I machined a trigger lever from a piece of aluminum I had in the shop.
![Image](https://s31.postimg.cc/4h53awoaz/20180504_131838.jpg)
![Image](https://s31.postimg.cc/g692yw2ez/20180504_182832.jpg)
![Image](https://s31.postimg.cc/5jf9th9p7/20180504_214116.jpg)
Took a little work, but with it all together, I was able to isolate the TCM, and amazingly, while the TPS will still not calibrate completely (still throws two codes) it will read correctly so the truck is now easily driveable! Stomp on the throttle and it'll spin the tires at the shifts for 1st, 2nd, and 3rd!
90 hours, 1.75 miles, 1 burn out, and ONE power slide!