Symptom of failing 2-wire PWM idle valve?

[gofastant]

Hi,

I have 3 bosch 2-wire idle valves. 1 does not respond at all, must be dead. 1 is inverted and the 3rd is normal. They were all built for the mk2 VW Corrado.

I'm using the normal curve unit right now and it hasn't been a long time on the MS but it has started to not go to cranking position at start-up. It seems to stay in the last running position. It will open up to the cold running state eventually. Has anyone experienced this?

[Matt Cramer]

I'd try oiling the valve first.

[gofastant]

Will give that a try.

[gofastant]

Doh! It wasn't sticking, it's just that the crank-to-run time has no effect. After it starts it goes straight to run position. I created a different topic for this issue:
viewtopic.php?f=89&t=42567