i just switched from tbi to carb, the motor starts up and runs, seems to be tuned perfect, but i have a high pitch whistle, which ive been told is a vaccum leak?

how do i find a vaccum leak? ive heard to the spray test, but i dont know what it is! ive also been told a mechanics stethascope is helpfull. im lost the stupid whistle is so high pitched i cant tell where its comming from...

 

I use a can of carb cleaner to spray around.

What carb is this? What intake and what gaskets?

 

Might wanna have a fire extingusher handy with that advise

 

its a weiland 8004 intake, gasket, squareboreadapter, gasket, holley 4160 carb... i think its a leak between the adapter and the carb, its sounds like its comming from there on the left side... im gona rip it down and put it back together today...

 

Try tightening it up first.

 

grrr... im stupid... it was the seal between the intake manifold and the adapter. i guess it slipped when i was tightning everything up... all fixed now...

o by the way i made my own stethascope it worked way better than the spray and pray method. all i did was take a 2 foot section of 3/8 hose, put an ear plug in one ear and the other ear to the hose... i would recommend this method!

 

That's pretty much the famous heater hose in the ear trick.

 

I love that trick. Also works well for tracking down interesting smells, but then you dont stick it in your ear...