idle stabilizing valve - shorted b and c - idles perfect.
 

To refresh your memory........ my cars idle was fluctuating up and down....and some times would go as low as to want to stall.

When I short b&c in the test plug it disables the idle valve and the idle stays ~900 rpm............. if I pull the short out the 700-1100 rpm bouncing returns!

Question:

1. Can the car be run with b&c shorted?

2. If disabled the idle valve and my idle is perfect. The assumption must be a faulty idle valve?.......... any other possibilities? I don't want to replace the valve to only find out the problem was else where?

Thanks!!

Which car is this?

oh.... the 951.

Sorry. I have a new MAF and turbo and injectors and other goodies....

I was having cold start issues and now I am having this wandering idle that is cured with b and c shorted.

:)

faulty idle valve?????? that's my guess.

oh wait, you said that ;)

Sounds like a crapped up valve

Clean it out and try again before you replace Many times they can be salvaged

AFJuvat

I'll try to clean it up.....

Is it just a mechanical valve? brake cleaner............blow it out.....and away I go?

It's mechanical, but cleaning is USUALLY a temporary solution, if at all.

Also, disabling the unit stabilizes idle, and that's cool but regardless of what's going on w/the idle stabilizer, idle should never get as low to the point of almost stalling.

Does this problem usually occur when the engine is cold, or all the time?
Ahmet