My 84 Westy, with a 91 Digifant II (Jetta) engine, has recently started puffing smoke. It has only done it going 70+ mph, while cruising down the freeway it will suddenly hesitate and puff out a very thick cloud of smoke, it lasts about 2-3 seconds, then runs as though nothing happened. Today it did it three times in four miles, I slowed down to 65 mph and it didn't do it again. Anyone have a clue as to what might be causing this? The conversion was done using Diesel parts.

Andrew
1984 Westy "Speed Bump"
1996 VW Jetta Trek  "Little Beep" (the wife's car)

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