Buckaroos,

I  the bucking is likely caused by a worn AFM. If you have ever had the plastic
cap pooped off of the AFM, you would have seen an arm that sweeps across an
electrical contact. This contact varies a voltage which tells the Digifant ECU
how much air is being inhaled. In time this AFM contact wears a groove. The
resistance of the contact becomes non uniform with the sweep arm. The ECU gets
false inputs and makes false adjustments to the Fuel Injectors. The engine
surges, the AFM arm moves, the ECU adjusts the FI back, and so. The recipe for
bucking, surging, whatever.

Of course the bucking could be caused by a stick throttle cable, a bad/dirty
throttle spring, usw.

Larry  Syncro Westfalia '86

> > She seems to have the bucking at low speed which is common in these
> > vehicles. I have the little dealer capacitor patch but it never fully cured
> > the problem. I have also done the Debbie cleaning fix and replaced the
> > little switch under the throttle body. Is there anything else to do or
> > should I just live with it for another 10+ years?