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post #4 of (permalink) Old 7th March 2007
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I've had a simialr problem on a Vauxhall Vivaro van,which is really a re-badged Renault Traffic.It uses a variant of the 1.9dCi engine also.

The problem was no power,no turbo boost and the management light was on.I traced the problem to the turbo boost vaccuum unit,and when I phoned up Renault to get another one they said that they kept 8 of them in stock and it was a common problem!.Fitting the valve transformed the van and the management light immediately went out.

The unit has two small hoses running to it,one from the inlet manifold and one to the vaccum unit on the turbo which controls boost pressure.

To help diagnose the problem I brigded across the two pipes with a piece of brake pipe and road tested the van.It was immediately better,so trying that might help.

I'd rather push my Alfa than drive a BMW....
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