I had the same surge/buck with my 83 WB. I cured it, with the following: 1. opened AFM and repainted carbon trace on circuit board with conductive carbon graphite paint, found at http://www.2spi.com/catalog/spec_prep/cond_paints3.html#7 2. soldered an electrolytic capacitor between AFM wiper arm and ground. It's been buck free for over 2 years. I'm not which fix was needed, but the repair cost less than $10 in parts. Duane O'Donnell Oroville, CA >Date: Mon, 17 Dec 2001 10:32:54 -0800 >From: van man <vannman99@YAHOO.COM> >Subject: Buck/Surge symptom at highway speeds?? Howdy, Saturday morning while driving on the freeway I noticed a sudden bucking in the 87 syncro. The buck happened a couple of more times while on the freeway, then ceased until I got to my destination. While comming home that night, it started again (at freeway speeds) and happened three times within about 5 miles. This morning on the way to work.. bam- there it was again at freeway speeds (65-70). I slowed down to 60 for the next 30 miles and it didnt buck again. The buck is kind of hard to explain. At first I thought it was more like a power surge - but how much power surge can I be getting at 70mph? It almost feels like Im hitting a bump... The rear of the van seems to almost lift a bit, I think I can hear a clunk like sound that seems to be from the rear. I havent down anything back there since doing the CV's about 5000 miles ago. Only other things Ive done recently is rewire the tachometer and replace the battery - both the night before the symptoms started. I know my throttle switch is bad - one of the screws is broken and I idle high and sometimes have a buck in first when I let up on the gas - but this new buck is always at 65+ with the pedal not to the floor, nor am I letting up on the pedal when it happens. Its pretty significant and a bit frightening.. Any clues? Thanks jeff
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