Quote:
Originally Posted by rgracin
It’s not too clear from that video what he’s doing. Presume removing the pipe from the vacuum pump to initiate the popping?
If I clamp the hose, it makes no difference. If I take the brake booster pipe off, the popping almost disappears. Brakes appear to be fine.
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He is me ;-), removed the hose of the enginemounts to induce air popping
Then you have a tiny leak in the breakbooster,(separate bigger hose)so the vacuum pump can generate enough vacuum to let it function but the amount of removed air causes the popping sound