Car cuts out under boost then kicks back in

[89gt02]

Hey guys im new on here and need a answer as this car is my dd. I just put a mbc on it and now it cuts out under boost then it will kick in and out and so on. It just started this wen I put on the mbc it is a cheap one. The only mods I have is front mount intercooler and pipeing kit I set the boost to 14 and I also have no stock mbcs at all plugged in and also have bad o2 bank 1 sensor 2

 

[TechTherrien]

I had a similair problem on my 2g when i used the stock bov with my new b16g. it would boost till 9 pounds then car would like shut off then come right back on. I got a hks and that fixed it.

That sounds to me like the stock surge valve was faulty or leaking

 

[n0de]

Where did you connect the boost controller? is boost spiking at all?

 

[turbolover10]

Like others have said multiple times bypass the MBC for now and BOOST leak TEST already!!! If you want to be able to control you fuel get something to tune with. Check out vfaq.com and you can build your own blt for cheap.

 

[Tooltrt87]

Just another voice to add. Boost leak test. if ya cant do one asap just tighten al l your charge pipe clamps and check your vacuum lines. 10 min worth of work. if problem persists...boost leak asap regardless if your result is positive or negative.

 

[Cooper-97gst]

i gave up on reading his post.... please use periods here and there. smh

 

[89gt02]

Ok guys thanks alot for the help. I have a greddy bov and its missing adjustment screw it has tape on it maybe thats an issue

 

[PrimerPLus]

Doh

You ever do a BLT before?

 

[n0de]

Sounds like problem found but I would still do a BLT anyway regardless of the missing adjustment screw.

 

[89gt02]

I have a greddy bov and its missing the adjustment screw and has tape over it that could be an issue .

 

[n0de]

I have a greddy bov and its missing the adjustment screw and has tape over it that could be an issue .

Yes... Yes it could be an issue. If you do a BLT you will know for sure, and you will know if there are multiple leaks.

 

[Paintballaa5]

Just another voice to add. Boost leak test.

Like others have said multiple times bypass the MBC for now and BOOST leak TEST already!!!

Just like everyone said boost leak. Mine did it when I had a vacuum line fall off .

Boost leak test wont hurt.

And it's really sounds like a leak

sounds like you have a boost leak test for that first

Can't say it enough, boost leak test lul.

Boost leak test

Boost leak test dummy

I think it's obvious what you need to do..

 

[Vander Nars]

Just a guess could be spark blow out or ## injectors are maxxed out.