MaxPower, I've never experienced a CEL by swapping the TPS signal up.
The specification for the common Denso 0-5v style, is a CEL will be triggered greater than, or equal to 4.9 volts. The ECU's have no way to crossrefference the TPS signal to another thing to check if it's working correctly for what we do. If you play with the IDL output, you will get a CEL.
We modify the VTA output. Becase of the conditions change the ouput of the TPS sensor, it doesn't overlap an area where the ECU's check to see if it is out of spec.
Transient response changes are going to be fairly negligable. We also have control of it if it needs to be modified.
One thing that a lot of people have done is replace the TPS's VTA signal with the air sensor signal (Assuming the signals can be made to match up). Some people hate the idea, but because you tune by how much air is entering the engine at the moment, instead of how much "might possibly be entering the engine right now, or in the near future". Transient throttle responce becomes extremely sharp.
Peewee it sounds like you're compairing tuned, to something factory. Throttle response, and engine power, economy are obviously all going to be better!
Given enough time & some experience with the engine & applications, a great tuner makes all the difference in the world.
The specification for the common Denso 0-5v style, is a CEL will be triggered greater than, or equal to 4.9 volts. The ECU's have no way to crossrefference the TPS signal to another thing to check if it's working correctly for what we do. If you play with the IDL output, you will get a CEL.
We modify the VTA output. Becase of the conditions change the ouput of the TPS sensor, it doesn't overlap an area where the ECU's check to see if it is out of spec.
Transient response changes are going to be fairly negligable. We also have control of it if it needs to be modified.
One thing that a lot of people have done is replace the TPS's VTA signal with the air sensor signal (Assuming the signals can be made to match up). Some people hate the idea, but because you tune by how much air is entering the engine at the moment, instead of how much "might possibly be entering the engine right now, or in the near future". Transient throttle responce becomes extremely sharp.
Peewee it sounds like you're compairing tuned, to something factory. Throttle response, and engine power, economy are obviously all going to be better!
Given enough time & some experience with the engine & applications, a great tuner makes all the difference in the world.
