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?

Phil, posted this to the list, but didn't get a real conclusive 
response. I too am interested in what the symptoms of upper o-ring 
failure are. The symptyms of my car are detailed below.


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. Fuel pump and 
injectors are recent.
-- 
Joshua Van Tol -- josh at spiny.com