boost, then stall.

[bowens1414]

ok on the way home i seemed to get my mbc situated but once i was about a 1/4 mile from my house i did a second gear pull to notice i was back at 5psi of boost after i did that i kept the clutch in for a moment and the car died so out of curiosity i replayed the even to see if it was a fluke. no fluke same thing happened this is a 97 gst person before me did an emissions delete along with the stock boost controller. so ive been trying to just get back to stock levels and i finally do for a bit. then this happens. so if anyone has an idea help would be greatly appreciated.

 

[dsmpat95]

Boost leak test would be the first thing.

 

[gieri002]

Also make sure unmetered air isn't making it through your intake after the maf.

 

[bowens1414]

another thing my ecu is the eprom idk about a tune i bought it used. engine has been out of the car (new engine mounts let me know) bov is a 1g dump valve not recirculated. im trying to piece things together and slowly fix them.

 

[gieri002]

Recirculate your bov, that might be your problem right there. The tune/ecu shouldnt have anything to do with this problem.

 

[bowens1414]

ok and this MBC problem is pissing me off. yes it works fine but not in the car. my boost is weird its not normal where it spools around 3-4k and slowly lowers as rpms rise. it will quickly creep as if the WG flapper will not open. but other times i cant get over 5psi with the MBC in the same position leading me to believe that the flapper is sometimes stuck open a little bit. with this stalling problem new im not sure if the WG has a link to the problem but seems like it could.