d15b7 running uberdata, 14b turbo, highflow cat, tanabe catback exhaust,dsm450ccs. I am still getting a map cel code. How do i install check valves and where i have tried searching. Also another problem....when im building boost the turbo is heard spooling and then the greddy type s blow off valve putters, like not PSSSSSSST! LIKE PST....PST....PSSSST..... FEEL THE ENGINE BOG DOWN TOO LIKE AROUND 4000 RPM but once it idles for a while it is fine..."sometimes" once i cut the car on and let it run in idle for it to warm up it will run very ragged and then even out...it wants to torzue or move under pressure also my boost gauge is run from a line from my bov to my IM with a T adapter...Now my boost gauge reads vaccuum not boost...

 

you shouldnt be getting a map cel. that's strange.
the bov is making that sound when your mashing the pedal? or off the gas?
where on the manifold did you get the vacuum source?

 

when i let off the gas it is making that sound...the map cel doesnot come on until I get the car driving and past 3000grand....?

 

I used a T and put part of it in where the map sensor goes, then i silconed around it. I hear that it is one check valve for every 3psi. So from the other part of the T I ran a check valve, then i ran it from the top to another T to a check valve and so on. I ran 4 check valves, then off of the last T I ran it to my map sensor. I found out now, that it has to stay perfectly sealed to read correctly. So I am going to buy a missing link. Mine sputters and drops down to around 500 rpm at idle. and if i move the T around Its the map sensor thats getting messed up. As for the $70 I think its a good investment