a whistle from engine compartment

[steechfinger]

im getting a whistlewhen i brake or aftert i let off the brake i think its a vaccume line bit im not sure ive changed all the lines i could see and its still there my brake system is compleatly new from the master cylinder down to the callipers and weel cylinders. could it be my cruise control unit?

 

[Bully Bob]

Naw,

Something is a-miss in the master cyl. (or the vac. pod itself)

Get your ear down close under the dash....(not rolling of course) [-X )

 

[wtfdissux]

one thing is how does the engine run when you hear it if their is a vacuum leak you engine idle would change if in fact it is a vacuum leak get a can of carb cleaner and spray around the vacuum lines when the idle surges you know where to look but remember the engine is hot and carb cleaner is flammable

 

[steechfinger]

the engine runs fine shit all the work ive done i cand believe ther can be anything wrong ill get some carb cleaner tommorrowand see what i see

 

[Bully Bob]

The vac. canister (attached to M/C) can develop internal leaks.

Can't detect that with carb. juice.

HTH

B

 

[Seabronc]

Propane gas is safer to use than carb cleaner for finding vacuum leaks.

>-

 

[steechfinger]

propane?

 

[wtfdissux]

thats not the first time I've heard that and dont know how you would do that either ..... about propane that is

 

[snowman74]

Try taking a length of rubber hose...3/8, 1/2" inside diameter or so. Use it like a stethoscope. Narrow down where you think the noise is coming from and hold one end to your ear and probe around with the other one. This is an OLD mechanics trick. Also, if you put in a high flow (such as K&N) air filter, that will make a noise.

Snowman74 >-

 

[wtfdissux]

another idea is remove and block the hose from the vacuum booster if the noise goes away then it is certainly a vacuum problem but from what you have said it sounds like you may have a bad power booster

not extremely rare or hard to replace providing you can find one