So far, I'm happy with the 4G69 throttle body swap. Everything seems to be running alright with one exception. Yesterday evening on the highway, I look down at my speedometer and noticed it was reading at, around 80mph; I felt as if I'm actually going 60-65mph. Today, I'm driving down my street, 1st gear/ around 2-2,500k rpm and I reach 20-30mph real fast, while I'm actually only going about 10-15mph. Can anyone help me with this problem, what do I need to do? Re-calibrate it? Go to dealership?


PROBLEM SOLVED, THANKS GUYS!

 

Throttle body doesn't have anything related to your speed sensor. Did you change the tires with different size? That can explain your issue.

 

Is not your throttle body

 

Correct, the throttle body has nothing to do with the speed sensor, but everything was good until I installed the 4G69. Right now, I have my stock wheels on but during the summer, I use different wheels. Even when I use those wheels, there's no problem. So, I have no idea what went wrong? Can a tune fix this? What tuner should I go with? My buddy who gets his done is $300 for the first time and anything after that is free. What are some good specs I should set my car at ect? LMK. Thanks!

All I have on the car now is...
...oem wheels, rrm aluminum crank pulley, injen cai, injen full exhaust, tein springs, twm short shifter.

 

How did you end up fixing the problem?? Thanks