so im trying to do a boost leak test and i can not build any boost, i have the motor at TDC and still nothing... any ideas?

there is some boost leaking out of the exhaust tho, so idk whats going on
builds air in system but is venting to exhasut somehow

 

do you have a boost controller? if so you have to cap off one of the two hoses, or just cap them both

 

everything is set up correctly as far as capping lines and things like that but im really looking for why boost is escaping out of exhaust

 

turn crank a bit more.

 

Is your crankcase vent tube running into your intake and your pressurizing at the maff? If so there your issue. Pressurize at the turbo inlet.

 

90% chance EGR vac line is off

 

Egr it was thanks guys

 

Glad that helped.

 

Impeccable! Really a nice call.

 

I've done so many boost leak tests I could do them in my sleep. Some early mornings I probably have... :-/

 

that has been driving me crazy for about 5 months and 3 tests haha thank you for finally solving the question, that line was blown completely off the nipple

 

zip tie everything! zip ties are your friend. on my car i even super glue the nipple before i put the vac line over stuff since stuff starts to leak past 35psi where it dont around 25-30.

specifically zip tie the fuel pressure regulator vac lines for safety.

 

old school trick to backup the zip ties....shoot a little hairspray on the end of the hose and slide over the fitting or vacuum nipple then tie of with a zip tie. when it dries it'll glue the line on with a temporary bond that can be remove with some force, but won't blow off under high boost.

works great on couplers and orings too in a pinch if needed in such an application.

 

I use this on all my couplers too. Hairspray is like magic! T-bolt clamps help too

 

hairspray works awesome, carry a bottle in the car with me just incase... my hair messes up hahaha but yeah the FPR as leaking a little also, some zip ties fixed it nicely