Hi All,

Well the Vanagon is finally set, tomorow inspection and GO.

Tonight something bizarre happened though.

Without an O2 sensor plugged, the engine ran just like a charm, a bit fast
as far as idle is concerned, but very stable and no misfiring.

I plugged my new Bosch O2 sensor, and there is misfiring, irregular idle.
On the road, the van is OK as far as power or misfiring is concerned.  I
know I shouldn't drive the van on the road yet, but it's for adjustments.

I unplugged the o2 sensor and everything goes back to normal.

This is weird isn't it ?

The computer actually needs the info from the o2 sensor !

The rest of the van is top shape, big tune-up, new oil, prestone, timing,
etc.

Any ideas ?

Thanks in advance

Ignace

1985 Vanagon GL
1967 Volvo 144S V2