Well, the little black box controlling the idle bypass valve can sometimes be repair at a cost of a dollar or two. I'm NOT saying it can always be repaired, or that the electronics are always to blame for this problem.

At the moment I have two broken controllers on my desk, they come from a neighbour's Vanagon. I don't know why his van blows them, maybe the valve is stcking and overloading the power curcuit.

I've found that replacing the BD 438 power transistor can fix this. I've been using an "upgrade", the BD 912, partly because I can't easily get the BD 438. The BD 912 has higher ratings, and should last better. One of them didn't though. It lasted one year. On my own van it has lasted for three years.
Still, it is a cheap and proper fix.

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    Johan Nyberg, Sweden N 59o E 17o 25"
    '86 Caravelle C
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