So, my boost was spiking at 24 psi and falling to 14-15 psi at 7000RPMS. I did a boost leak test and found that the Throttle body seals were leaking. So I fixed them and the car is still loosing losts of boost. I did another prussure test after I fixed the seals...the seals are not leaking now. I pressured up the system to 30 psi....no leaks, but my boost is still falling. Here is a vid, I think I still have a leak somewhere. My friend told me it might be my EvoPowerMods o2 dump. He said it might flow too much keeping the boost down, that made a little sense. However I dont think any O2 dump users are loosing boost.

On this vid its spiking at 24 psi falling to about 14 psi. You can see the needle drop real fast at one point. I do 2 pulls in this vid.

http://www.youtube.com/watch?v=IEBSNRo_xHA

 

Did it start when you put the o2 dump on? If you want to eliminate that as a cause, remove it and try again.

 

Way to much work for that, Ill put a FORGE WGA before I remove the O2 and put the stocker on. I really dont think its the O2

 

Bump for Wizards

 

What BOV looks like a stock one. hammer it on top or replace it with a FOrge recirc and try again.


S

 

Yeah that looked wierd. You could disconnect the vacuum source from the BOV to see if this helps. It won't hurt to run your car without blow off valve.

If you have a spare mechanical pressure guage you could run a vacuum line quickly out the hood and through the passenger window and double check what is happening to make sure it is not your guage.

 

I had an APS on it....switch it back to stock....the stock one held 29 psi. I think its the WGA getting blown open. I think Im going to try doing the spring mod on the WGA