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Originally Posted by Brian Carlton
Bert,
Since many of the older vehicles have boost pressure that is below spec, is it possible that this hole becomes clogged over time and allows close to 100% boost pressure on the diaphragm?
This would cause premature opening of the valve and result in decreased maximum boost pressure.
Your thoughts on this???
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Your notion is correct and this is a problem on some engines. He should probably remove the cover and inspect the diaphragm visually. At that point, you can spray some WD-40 down the opening in the valve stem to verify whether it is open or not...Bert
02-19-2005, 10:35 PM
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