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RE: More on k-Jet idle problem

[email protected] writes...

>Now, finally, here is the interesting part.  I was out testing it this
>morning, and the problem still existed.  So far, I've been unable to check
>timing/advance related systems, so I decided to try something.  I unplugged
>the vacuum advance hose to the distributor just to see if the idle dropped,
>and it didn't.  I revved the engine a couple times to see if it would run
>worse at high revs, but it didn't seem to.  So, i decided to drive it, and it
>drives exactly the same!  This shouldn't be the case, should it?  I mean, it
>ran *exactly* the same with the supposed vacuum leak and no vacuum advance at
>all.  Am I wrong to think that something is wacky with the ignition?  

Hmm... no change with the vacuum disconnected, symptoms of vacuum leak.

2+2 =.....

Looks like the vacuum diaphragm is leaking or torn. Have you tested the
vacuum advance mechanism?

Amit Raja
'83 533i