Could be a "hissing" sound
sounds like a vacuum leak check your vacuum lines for breaks or excessive wear and replace sounds like a vacuum leak check your vacuum lines for breaks or excessive wear and replace sounds like a vacuum leak check your vacuum lines for breaks or excessive wear and replace sounds like a vacuum leak check your vacuum lines for breaks or excessive wear and replace sounds like a vacuum leak check your vacuum lines for breaks or excessive wear and replace sounds like a vacuum leak check your vacuum lines for breaks or excessive wear and replace sounds like a vacuum leak check your vacuum lines for breaks or excessive wear and replace
vacuum leak.
Did you change spark plugs lately? If you did you could get vacuum leak in upper air intake manifold - 4 rectangle shaped gaskets.
sounds like a vacuum leak some where in the system
sounds like a vacuum leak check all the hoses around the engine
It sounds like your truck has a vacuum leak. If the truck cannot build up proper vacuum pressure it will not operate properly.
Sounds like a vacuum leak - check the hoses to the vacuum actuated motors under dash Could be a bad check valve in the vacuum booster (for brakes)
Check your intake gaskets and seals, as this sounds like a vacuum leak. Also make sure that the timing is dead on.
Check for a vacuum leak either under the hood or under the dash area
I have a leak in the brake booster in side the cab. it sound like it is sucking sound and i move the rubber boot and it slows down or stops. can this cause any brake problems.
It sounds like you have a vacuum leak from either a vacuum hose or a leak or crack in your intake. Check for hissing sounds.
I have the same problem... was told it is a vacuum leak, possible around the PVC valve.