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Made a temporary connection to a pressure gauge. When starting with cold engine pressure is going up to 0,5 bar around 1900 rpm and drops off above. After driving 5 km and engine reaching operating temps, pressure suddenly drops to zero. Looks to me like an electric fault in a component when it gets warm. The drop was instantly from pressure to zero when I was watching the guage.
Don't have a vacuum guage near to test, but is that nessesary now?
I been reading the service manuals, 2 heavy books. Not the easiest to follow, especially when I don't have the diagnostic tools. Any further suggestions appreciated.... I'm going for a 1 000 km trip in a few days and don't fancy limping along without turbo pressure 
. I have taken the MAP sensor off and measured resistance. No change when putting a bar pressure on it.
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P-O
Last edited by Pogust; 05-09-2011 at 05:23.
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