Auto VE Tune P11, OBD1 Stepdown?
Here's the short story:
DE blows up, I buy a VE. End of short story. Now nxSRg20 (Chris) and I are preparing to swap the VE over to my P11. My P11 is an automatic. Before anyone jumps to conclusions we are trying something unique here. We want to change the shift points of the auto tranny but we aren't sure if the stepdown to OBD1 will take over the TCM functioning within the ECU after. Maybe we should not use a step down and i should have the 16-bit obd2 tuned? Do I even need to step down since I have a 99' ECU which is 16-bit obd2, can't the emissions be tuned on the 16-bit? I'm just confused as to how odb1 autos work because those sensors don't exist since obd2 started to use the TCM controllers to control the trans functions rather than mechanically. Also we need to remove emissions component completely since this is a VE swap. I need to be able to run my VE with no EGR etc. alongside my automatic.
Secondly, we were wondering how to change the shift points, would we go through the TCM or would we need to go through the ECU?
We don't know exactly how this would work out. Any input is appreciated, we have an interesting idea regarding VVL and the auto transmission we just need some advice as to how to make it come together.
Forgive me if I made a mistake or an error, I don't know much regarding the auto transmission functions since its rare for anyone to actually keep them in the car lol.
DE blows up, I buy a VE. End of short story. Now nxSRg20 (Chris) and I are preparing to swap the VE over to my P11. My P11 is an automatic. Before anyone jumps to conclusions we are trying something unique here. We want to change the shift points of the auto tranny but we aren't sure if the stepdown to OBD1 will take over the TCM functioning within the ECU after. Maybe we should not use a step down and i should have the 16-bit obd2 tuned? Do I even need to step down since I have a 99' ECU which is 16-bit obd2, can't the emissions be tuned on the 16-bit? I'm just confused as to how odb1 autos work because those sensors don't exist since obd2 started to use the TCM controllers to control the trans functions rather than mechanically. Also we need to remove emissions component completely since this is a VE swap. I need to be able to run my VE with no EGR etc. alongside my automatic.
Secondly, we were wondering how to change the shift points, would we go through the TCM or would we need to go through the ECU?
We don't know exactly how this would work out. Any input is appreciated, we have an interesting idea regarding VVL and the auto transmission we just need some advice as to how to make it come together.
Forgive me if I made a mistake or an error, I don't know much regarding the auto transmission functions since its rare for anyone to actually keep them in the car lol.
Last edited by G20Tyler
on 2013-07-15
at 07-41-15.