Air metering valve - MC-2

[Joshua Van Tol]

At 3:54 AM -0800 1/11/01, james accordino wrote:
>--- isham-research.freeserve.co.uk at pop.pol.net.uk,
>quk at isham-research.freeserve.co.uk wrote:
>>  One of the many outstanding jobs on Puff the Magic
>>  Wagon is the
>>  replacement of the fuel metering head.  I've had the
>>  typical symptoms
>  > of upper O-ring failure for some time.
>>
>
>What are they?

I'm wondering this as well, as I'm suffering some symptoms that seem 
to be metering head related on my 1987 5kcstq.

Symptoms are: Occasional miss at idle (maybe not related to the other 
problem), and (seemingly) a miss at >3000 rpm under higher throttle 
settings. Sometimes it pulls beautifully from idle to 6500, and 
sometimes it hits a wall at 3000-4000. Other times it's less severe, 
manifesting itself as a weakness in the upper rpm range. The miss 
isn't like a bad plug wire, where you have a regular sharp kind of 
vibration, but rather a sort of random misfire.
-- 
Joshua Van Tol -- josh at spiny.com