Several months ago I posted a problem with my 87 syncro 2.1 wbx having a
very high idle. Suggestions for repair we to replace or clean the idle
control valve and or the electronic part of the ICV.

I replaced the ICV with another and it was great for about 1 wk. Then the
idle went up slowly. I cleaned out the old one and replaced the other. Idle
went up even higher. Swapped it back and the idle is high again. Swapped out
the electronic part, no change.

So... vacuum leak? Is that what causes the computer to think it needs more
gas? Any specific ones that I should look at?

Any other suggestions?

thanks

peter