Please do not begin cutting wires before you prove the need.
What are the codes stored in computer memory as the first step?
There may be a harness issue, but prove it first.
In testing the TPS, the voltage is measured from the 2 leads to the common side 'return' and NOT to ground.
One lead is the supply voltage from the PCM internal supply.
One is the varying signal back to the PCM to tell what the position is.
One is the 'return' back to the PCM internal supply. This is why measument to chassis ground is not correct.
If you measue to chassis ground, it wil be inaccurae and false.
At rest, you should see about 1 volt +/- a tenth and should increase with throttle application. Too high or to low by some larger amount is out of limits.
Do not worry about the 'exact' value at rest because the system self zeros (floating zero) it 'as it's own reference point' each time you start the motor.
Also it does not do any good to ask why the air meter does anythng before proving the fault as the fault may be some other area.
I'm not trying to be smart with you but to get you to look at things within a logical order and not begin hacking and wondering, as a way to fix anything.
If you were to do this, it results in more confusion and more self inflicted issues.
Last edited by Bluegrass; 06-05-2012 at 01:40 PM.