Originally Posted by martysmartie

To test this you can just unplug the TPS, as it should be open circuit at idle, this is what the ECU looks for to activate it's idle strategy!

The ISCV should not affect the TPS reading, do you have a genuine ISCV or pattern, as having the latter myself they are not any good, they are VAE06 replacements if anything like the one I have and the spring ratings are all wrong so you get a very high idle as a result!

Martin