Thread: Sucking sound
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Old 02-22-2019, 11:50 PM   #2
Wrenchbender Ret
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Join Date: Oct 2005
Location: Overland Park, Ks.
Posts: 5,192
Re: Sucking sound

It may be a leak in the brake booster, or the grommet around the check valve. If you have a vacuum resoirvor for the A/C controls it might be that or the check valve leaking. Disconnect the brake check valve & hold your finger over the end or masking tape. Then try it. If it doesn't do iy then you know it is in the booster or grommet.
George
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