Today i was driving and boosted my car and it tapered to 16psi and my manual boost controller is set at 21psi. A couple days ago when i had race gas in my car it held 24psi to redline. Can someone help me out. It is pissing me off why my car is doing this.
Mods to help you out.
272in264ex
3"tbe no cat
Injen intake w/ up pipe
ss pro one exhaust manifold
dynoflash
255fp
hallman boost controllerw/ in car

Today the weather is about 10 degrees warmer than yesterday.
Thanks for the help everyone

 

i put my money on a boost leak.
make a pressure tester and keep your ears open.

 

So how would you go about to make a pressure tester and then how to test it. I did a search and no results. so if you could shoot me a pm on how to do it or post on here would
be great also thanks.

 

you can make one using a PVC pipe end cap, drill a hole in it and put a valve stem in the end, then just clamp it down on the intake side, such as where the stock airbox connects, and add pressure and listen for a boost leak somewhere...i don't have an EVO yet, so i am suggesting this based on what i have done with other turbo cars i have owned, just fyi...

 

there is a few threads with the link. search boost pressure tester

 

Hey,
Thanks for the help everyone.
I'll try searching that this time instead of pressure testers.