Quote from: Blackhawk on February 26, 2019, 11:30:57 AM
Any update how it is driving ? I am getting the shuddering as well and was ready to bring it to the dealer for warranty. Now I am thinking about putting the stock plugs back in before I bring it in. Not sure if they would give me crap about having tightly gapped colder plugs.
I actually do have an update. 90% of the problem was my throttle body. One possibility was that I likely messed with the positioning screw on the top of it sometime in the past (I don't really remember). Another possibility was the water/meth, I have sprayed w/m daily for the last 40k miles on this car and have heard that it can sometimes get into the TB housing. Regardless, I replaced with a new TB and saw a significant improvement in symptoms.
The surging although much better, was still there. AJP made quite a few adjustments to the tune, I'm sure he can chime in with all that was adjusted. I think he allowed a little more slip in the torque converter and adjusted shift points to keep the car out of the troubled surging areas. After that the car has been running great ever since.
Even though the transmission fluid is clear/pink and it was blessed off by the transmission shop... I still think it is just a matter of time until the torque converter goes. The car has almost 100k miles, the last 40k being pretty hard miles.