[urq] RE : suddenly lean - the saga continues
bob at maxboostracing.com
Fri Feb 16 12:59:37 EST 2007
In the metering head itself there are springs etc and a big diaphragm.
If that thing rips, it gives strange behavior, and you cant get it
Ingo Rautenberg wrote:
> A few things in play, actually. It can have deposits of varnish or
> other debris, and also (more likely) is the fuel pressure regulator
> attached to the metering head goes bad -- and not available
> separately (so I've heard).
> Oh, then there's those rubber pieces that can shrink.
> Mine was also solved by replacing the metering head....
> On Feb 16, 2007, at 9:39 AM, Louis-Alain Richard wrote:
>> Just for the sake of knowledge, how can a metering head be bad? In my
>> memory, it is a purely mechanical device, so what can go wrong ? What
>> is rebuildable ?
>> -----Message d'origine-----
>> I had something similar with my MB a year or so ago - didn't matter
>> how long I spent getting the mixture and idle speed correct, once I
>> revved the engine the mixture would be all over the place when it
>> settled back down to tick over. With the help of a very friendly
>> tester I managed to get it through the emmissons part of the MoT (set
>> it, set it, don't touch it, test it quickly) but still couldn't get it
>> to idle correctly. Gave in eventually and exchanged the metering head
>> for a rebuilt one - it's perfect now.
>> Jim Haseltine
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