Exhaust Leak Tester?! Loosing boost and loud humming... need a leak tester

[samnumba1]

Ok well I have done a lot of maintanence stuff latly... timing belt.. all seals.. valve cover gasket oil change radiator flush tranny flush and I had a bolt missing on my exaust manifold so I helicoiled it put a stock stud in and bolted back on the exhaust manifold ( with ALL new gaskets) I know there is a exhaust leak somewhere casue at idle no noise(no boost tring to leave) then I revv it up and the higher RPMs are the louder the humming. When I drive and I hit boost there is NO PULL AT ALL I just see boost go up and no power... so I need to find this leak because there is no carbon deposits or anything and I put my hand all over the exaust and couldnt find it at start up... or by what im describing is there an exact spot I should look at
thanx,
Sam

P.S. I torqued all the bolts down to spec throughout exaust... im thinking the manifold possibly bent while the screw was gone

 

[herostar]

Sounds like your leak could be somewhere in your intercooler piping and not in the exhaust. You can check vfaq.com for how to do an intake leak test. You should also check your spark plugs and make sure you are using premium fuel.

 

[samnumba1]

Ive done a leak tester fixed all leaks... I use 93 octane fuel and my spark plugs are perfect with gap at .28 with BPR6ES thanx ne way

 

[herostar]

If it was a leak in your exhaust before your turbo your boost would build slower if at all.

 

[samnumba1]

hmm well it spools pretty normal... the problem is there is no power under boost does this mean the leak is after turbo??? maybe O2 or something?

 

[alex99gst]

try poppin your good and having someone else rev the car and you feel around for air blowing out or anything like that. and a leak after your turbo wouldnt make you feel no boost at all

 

[samnumba1]

try poppin your good and having someone else

he he that sounds so dirty... ill make sure to do that though

 

[herostar]

A leak after the turbo will cause no loss in performance, but will be very noticable and loud, especially if it's near your o2 housing.

 

[samnumba1]

ok well then its not after turbo... cause its very loud but there is a huge loss in profromance im thinkin a loose exaust stud ?

 

[alex99gst]

maybe there is a ginormous hole in your IC. keep checking things and tightening up bolts and see what happens

 

[samnumba1]

now im getting sorta pissed i tightened all my exaust studs to spec and did boost leak test NO LEAKS hooked up my EGR just in case nothin... I have no boost leaks I cant figure out if there is exhaust leak im so confused.. the vibration feels like its from intake manf

 

[madracer247@aol]

Sorry to hijack the thread just have 1 question ......If i had a leak from my inake manifold would that effect my car??? i hear this little noise coming from back there any ideas??