frequency valve, 200tq '89 MC2

[edkellock at juno.com]

Speaking of which...

My newly acquired 89 200q MC2 has just been treated to
new O-ring seal on the dipstick.  The old one pretty much 
disintegrated in my fingers as soon as I tried to remove it.

So now, I'm wondering if the mixture screw needs a little
fine-tuning.  I believe the idle speed is a tad low since the 
new O-ring.  It is quite steady, but low.  Before, I'm pretty 
sure it was fairly steady, but a bit higher.  

Ed
Colorado Springs, CO

On Wed, 24 Jan 2001 13:25:59 -0800 (PST) Orin Eman <orin at wolfenet.com>
writes:
> 
> I've seen this when someone has messed with the mixture screw and set
it way
> rich.  I think the valve fails to open when the duty cycle drops down
to 5%.
> 
> The two cases can be distinguished by hooking up a duty cycle meter.
> 
> If the duty cycle is going down to 5%, you have to work out why.  Just
> using the mixture screw to bring it back up may be masking the real
problem.
> 
> Orin.
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