Almost stalls letting off gas sometimes

[Talonman86096]

Ok so basically I think I may know why this is happening but wanted to ask. Best way to describe it is like what happened when your running you BOV open and not recirculated. The idle will bounce SOMETIMES after letting off the gas and coming to a stop, never stalls when it happens. I realized the my MBC is hooked up wrong (previous owner). It's t'd of of the BOV line which I know is incorrect. Could that cause that issue sometimes? My BOV is recirculated.

So now I need to fix how the MBC is hooked up which leads me to another question. I have a B16g turbo that has the old TRE housing so it's rotated with no J pipe. Looks stock. Where would I run the line from the MBC? There is what looks like a bolt sticking out of housing that looks like it's capped off. I may sound really noobish here but I don't know what it is. Could it be a boost source??

 

[Bud92gsx]

Hows your vaccume?

You could have vac leaks.

 

[nwBryce89]

what he said^^^ and yes that most likely is a boost source if its on you compressor cover.

 

[Xray2k4]

If there's a bolt on the compressor housing you can remove it and put a 1/8 NPT nipple for you boost source like the picture below

You must be logged in to view this image or video.

For you stalling issues check if you MAF sensor connection is not loose.

 

[Talonman86096]

I'll check out the maf sensor and make sure it isn't loose. Tomorrow when I have some light I'll get a picture up of the bolt on the housing and see what you guys think. As far as vac it seems to be normal. Right around 19-21 at idle and upwards of 27-28 on deceleration

 

[Talonman86096]

You must be logged in to view this image or video.

This is what's on the housing that I didn't know what it is. Could sound like a complete noob but could it be used as a boost source or is it something else??

Any thoughts on this??

 

[Talonman86096]

Doesn't anyone have input on this??

 

[Blu90GST]

That looks like a vaccuum nipple and a hose clamp to me

 

[mjdarg]

That looks like one of the mounting holes for the WGA. Perhaps a previous owner stripped out the hole and tried to re tap it but drilled into the compressor cover and had to seal it?? ¯\(°_O)/¯ inspect it

 

[braden26]

I have the same problem with mine, if I leave it in gear before pushing the clutch in right away it stops it from happening. From what I understand it's being caused by a boost leak..

 

[lasershark]

looks similar to post 4 don't you think? I bet it's a boost source

 

[codym]

I'm not sure a rubber nipple is sealing that correctly, but put simply -
the boost controller should in some way, shape or form be tied in to the wastegate, so it knows what PSI to open at in order to maintain desired boost.

Nothing should be connected in the BOV line, it should be completely recirculated back in the intake or it can be vented with the proper mods.

 

[Talonman86096]

I agree it does look similar to the previous photo. But it seem to be in what looks to be an existing hole, I don't think the hole was added but the bolt was. In the first picture you can see the spot where it is on mine.

I know nothing should be T'd into the BOV line that's what I'm trying to fix. I don't really have the ability to take off my turbo and add a boost source so I just wanted to find out if this was one.

I agree that it looks like a mounting hole for a WGA. Could it be that the housing on the turbo once was not rotated (TRE) and the wastgate was mounted on this hole? And then plugged after the TRE conversion? I don't know I may be way off there.

 

[Talonman86096]

Ok so what would be the worst case scenario if I just try hooking it up there and it turns out to not be a boost source? Would my boost just be sporadic? Also just and FYI I have an Extreme Technologies Boost controller.

 

[Talonman86096]

You must be logged in to view this image or video.

Ok so here's a picture of it without the cap. What do you think? Boost source? I'm starting to think it is.

 

[Breezio69]

Yes, that is a boost source, these turbos do not have a source on the cover so that was done by someone previous... you can use a hose barb either on the j pipe, or just like you have. It requires drilling out housing right there, tapoing the threads to 1/8npt and boom, done. Simple, the turbo isn't broken or anything. Its just an extra way to utilize a place to run a boost source.

Look at post 4, my turbo has that spot (by his thumb) drilled and tapped all the way through with a plug in it right now, because I have a source on my j pipe. That particular hole does nothing for holding anything on the turbo like the wastegate etc... does that make sense now?

Also you said your housing was clocked straight down, so that is a wastegate hole on YOUR turbo. Because essentially you are looking at the bottom of the turbo if it were clocked the right way. Make sure the hole is drilled all the way through before you hook the wastgate or boost controller line to it.

Get the tee off the bov line, go from wastegate to the boost controller, controller to that hose barb. That easy peasy. Or to quickly verify, just run a hose from the wastegate to the barb on the cover and check if its around 10psi, like a stock actuator

 

[Talonman86096]

Awesome. Thanks a lot!! I'm going to make sure it's drilled all the way through which I'm guessing it will be otherwise why would it be there but you never know. Then I'll get everything hooked up the proper way. Thanks for the help!!!