Any IAV Gurus here?

Vehicle? Year? Model? Engine?

And, don't you mean ISV?

- Peter

If the idle valve is working ok then you might need to change the ECU. Some early 2.0's had the ECU idle programmed too low. What's the ECU part number? Also I think somewhere I had information of increasing the idle via changing the block values within the ECU with the VAS5051. Should work with ross-tech too....

Ok, here's an update now that I know more.

1. It works normal until it reaches operating temp!
2. I swapped ECU's and have ruled that out.
3. On the measuring blocks, the duty cycle of a normal operating ISV, jumps about 8% to compensate for load. Mine only goes up 1-3%. Don't know why, but a good ECU does the same thing, and the ECU in that car was swapped into another car and operates normally, so I'm thinking a component input, possibly heat related.

Today I'm going to compare all engine measuring blocks to the readings of a normally functioning car. If I don't narrow it down that way, I'll start by swapping out the throttle body (already did ISV). Then on to other components. Wish me luck!

Tim

I sure would like more info if it's out there about changing block values with the ross-tech tool if anyone has it.

Tim