hitmanpty

what is the best way to check for vacuum leak????????

nickpe

starting fluid. spray a small amount at places like intake gasket, vacume hoses. if there is a leak it will change your idle speed

hitmanpty

how about smoke. I saw a youtube video where the guy use an cigar to blow smoke on the system. and you can see smoke coming out. makinig very easy to spot the leak

gunnerjuju

I saw that video also but couldn't figure out where to blow

PLRX

That works great.

WW7

Man, you must really trust us posting something like this.....WW

Keystring

Brake booster hose.

Disconnect it from the booster, light up and 'blow'!!

hitmanpty

hey no shame. I dont know where to blow ether. I just dont want to be the one who say it

Midnight 85

I used the cigar smoke system once, I don't smoke, got sick as a dog and dizzy as hell and still didn't see any smoke escaping other than places I forgot to seal shut. You will need to seal the throttle body inlet. I've always had good luck with a water bottle, spray the water along the intake/head area and all the other intake areas that has a gasket. If the engine stumbles it means water is getting into the combustion chamber and you've found your leak. I've tried propane too but never had results.

Midnight 85

Wait until Friz sees this.

383vett

This is the ultimate vacuum leak tester. Back off the intake and exhaust valves, replace the throttle body with this plate. Apply vacuum to see if it holds. If it doesn't, apply cigar smoke and see where the leak is. There is a cork gasket on the other side which seals against the plenum.

Midnight 85

What a great idea! That would work like a charm

Caboboy

What a great idea Will, that should be done on every buildup or reassembly!

gunnerjuju

that was a gift even though it is true