Leaking DVs?

suspect · 07-21-2024, 10:27 AM

Trying to chase a boost/vacuum leak.

Took the front DV off and pressure tested it using a tyre inflator. It would not go above 4 psi and I felt a very slight bit of air coming out of the relief end (the part that connects to intake). I then tried to introduce vacuum where the DV connects to the intake manifold vacuum line and it slowly lost vacuum.

I then tried to introduce vacuum to the rear DV in the same way and it lost vacuum with an identical rate to the front.

Car makes 11-13psi when 16.5psi is demanded. Sometimes makes 15.5psi. Do the DVs hold vacuum? Does this sound like bad DVs?

suspect · 07-25-2024, 05:21 PM

This is the test (@~2:00) I did except mine would build vacuum and then lose it slowly.

07-21-2024, 10:27 AM	#1
suspect .******. 35 Rep 215 Posts Drives: car Join Date: Apr 2023 Location: location iTrader: (0)	Leaking DVs? Trying to chase a boost/vacuum leak. Took the front DV off and pressure tested it using a tyre inflator. It would not go above 4 psi and I felt a very slight bit of air coming out of the relief end (the part that connects to intake). I then tried to introduce vacuum where the DV connects to the intake manifold vacuum line and it slowly lost vacuum. I then tried to introduce vacuum to the rear DV in the same way and it lost vacuum with an identical rate to the front. Car makes 11-13psi when 16.5psi is demanded. Sometimes makes 15.5psi. Do the DVs hold vacuum? Does this sound like bad DVs?
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07-25-2024, 05:21 PM	#2
suspect .******. 35 Rep 215 Posts Drives: car Join Date: Apr 2023 Location: location iTrader: (0)	This is the test (@~2:00) I did except mine would build vacuum and then lose it slowly.
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