Originally Posted by
Yura
are you sure that your ISCV BRAND new, not a fake?
is your TPS adjusted properly?
I have the same problem - sometimes engine revs up to 2000rpm when start. But not depends of engine temperature - this can be when it cold or warm. My TPS is adjusted to 2 degrees when closed. But I found strange phenomenon - if I see from ECU Pectel Monitor that TPS parameter is more then 5 degrees(6 or more) when ignition is on(engine is not started yet) then revs will be 2000rpm when I start it. Revs can drop down to normal 900rpm whithout any activities from my side after some time, but sometimes I need to unplug ISCV, after that revs drops down and engine runs OK and I see that the TPS parameter dropped to 2-3 degrees as it was adjusted. Then I plug ISCV back and its ok. But I dont understand if this is ISCV problem how ISCV can affect to TPS parameter, I mean why TPS degrees(voltage to ECU) drops when the ISCV is unplugged??? Please help to understand.
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