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With fully warm motor and at idle, remove the vacuum line from the WUR and the CC must drop by about -0.5bar. For example if you are at 3.5bar at idle with vacuum connected and you remove the vacuum from the WUR the CC should go lower to around 3.0bar you need to verify this to be sure the vacuum line is working correctly on the WUR.
Basically, vacuum drops as load increases and at WOT you have nearly no vacuum and this in turn drops the CC and the mixture goes richer.
Hopefully that helps.
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Sal
1984 911 Carrera Cab M491 (Factory Wide Body)
1975 911S Targa (SOLD)
1964 356SC (SOLD)
1987 Ford Mustang LX 5.0 Convertible
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