low boost after track day

[Jrich825]

Hey guys so back story is, i finally took the pig out to a 1/8 stript day, Car ran perfectly before so minus a ranom MAf code here and there. Ran fine for a few runs until the end cap popped off the IC. Took the car home replaced the IC.

Only current Codes are
: low pressure for MAF(replaced original MAF that blew at the track and still getting this code)
: Primary o2(coming today for replacement)

After doing so I am still only hitting 15 pounds of boost where I would normally hit from 18-20 and tapper down in all gears, it also will sometimes only hit 14 or sometimes hit 19. Seems to only pull requested boost 1/10 times if that but its only in 3rd gear never hits full boost in 2nd. So far I have boost leak/smoke tested the car found a few very minor leaks and got them buttoned up. I logged the MAF at idle and its around 4.2 to 4.6gs at idle which is normal. Not sure why its still throwing that code. Im assuming next best option is to log a WOT in 2 or 3rd and make sure its pulling higher Gs up top.

Car is stage 2+ running a e40 mixture(it is not throwing any lean codes so i have ruled out that causing low boost issue)

Was thinking of trying to pull the sensor on the n75 and i should only hit 5 psi and hold if im correct, this would rule out any bad wastegates or torn boosts on them?

Looking for things to log or check out if you have any suggestions let me know

Thanks in advance

[rguil]

No codes for underboosting or overboosting?
You could log your boost requested vs boost actual to see if it is off.
If you unplug the n75 your boost pressure will be at waistgate pressure. The pressure you will see will differ upon what turbo you have. My waistgates crack at 20psi but k03s crack at 5-7psi or something like that.

[Jrich825]

No codes for underboosting or overboosting?
You could log your boost requested vs boost actual to see if it is off.
If you unplug the n75 your boost pressure will be at waistgate pressure. The pressure you will see will differ upon what turbo you have. My waistgates crack at 20psi but k03s crack at 5-7psi or something like that.

logged it last night for requested vs actual and it was underboosting. No codes for either of those. Just ran the car without the maf plugged in and got the same 14 pounds. Ran it with the n75 unplugged got 4 pounds only....hopefully not a waste gate issue

[rguil]

logged it last night for requested vs actual and it was underboosting. No codes for either of those. Just ran the car without the maf plugged in and got the same 14 pounds. Ran it with the n75 unplugged got 4 pounds only....hopefully not a waste gate issue

Dosent sound like a waistage issue. What is your logged waistgate duty cycle with the n75 plugged in?
What is a "low pressure for maf" code? What is the code off the scanner for that fault? The maf dosent read pressure is why im asking.
What G/s does your maf read at WOT?

[Corradovolksb]

If you have a boost leak a MAF range performance or MAF high input will be stored. Check yours throttle body boost and make sure it not torn. You may need to pressure test the system if you can't find anything that stands out as causing your issues.

[Jrich825]

I pressured tested before but I seems I'll have to try again. Yea only code is low maf reading. I did get a postative deviation code but that was after unplugging the n75 and maf for my testing purposes, but I doubt any of those would throw that code. Has to be a very small leak somewhere because im only loosing between 3-6 pounds of boost. Also the rpm drop after the clutch is engaged is not normal it will dip sometimes another 100-200 rpms and come back up sometimes so I'm going to have to say i have a small leak somewhere in that system

[Peter1.8t]

Light on fire. You'll thank me later.

[Jrich825]

Lol if I was still in wa I'd let you help me at this point