Was it accompnied by heavy smoking at the time of power increase...?

Just for safety's sake, its probably worth checking compressions/assessing if the engine has consumed some of its lube etc...

Is the lube-level as it should be?

Is there traces of oil (ATF) in the VCV line, and does your Vac pump vent to the Manifold/air-filer...?--Some do, so any oil from/via vac. pump could enter the inlet-manifold and give extra power....

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http://i190.photobucket.com/albums/z...0TDnoplate.jpg

Alastair AKA H.C.II South Wales, U.K. based member

W123, 1985 300TD Wagon, 256K,
-Most recent M.B. purchase, Cost-a-plenty, Gulps BioDiesel extravagantly, and I love it like an old dog.

W114, 1975 280E Custard Yellow,
-Great above decks needs chassis welding--Really will do it this year....