EXXEL Distributions
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read

Go Back   BMW M3 and BMW M4 Forum > BMW F80 M3 / F82 M4 Technical Topics > Engine / Drivetrain / Exhaust / Bolt-ons / Tuning

Post Reply
 
Thread Tools
      10-08-2025, 09:33 PM   #1
namburger
New Member
5
Rep
21
Posts

Drives: e93 335i -> f80 m3
Join Date: Jun 2023
Location: Austin, TX

iTrader: (0)

Unhappy I broke my car with front mounted intake...120308 charging pressure too low

I recently installed one of those front mounted intake kid and fitment was azz. I had to move the MAF sensors around and bend the vacuum line to make it fit.

Long story short, after the installation I got an immediate boost leak:

120308 - charging pressure control. Plausibility charging pressure too low.

Since the kit fitment was so bad I decided to remove it and return and put back the oem intake. Unfortunately that did not fix the issue. I took it to a shop for a smoke test and they originally thought they found a possible leak and tighten the clamps. Unfortunately on the way home the code came back for me and now the car just drive like there is no boost. I have data logs.

I'm on an MHD GTS tune and the shop told me to try clearing the code, put the car back on stock and drive it a bit to see if it'd go away. It didn't. I'm going to call them again tomorrow to see what other diagnostic they can do but I was wondering if you fine folks has some suggestions on what I can do to find the issue?

See logsAttachment 3833712
Attached Images
  

Last edited by namburger; 10-09-2025 at 07:10 AM..
Appreciate 0
      10-09-2025, 11:32 AM   #2
namburger
New Member
5
Rep
21
Posts

Drives: e93 335i -> f80 m3
Join Date: Jun 2023
Location: Austin, TX

iTrader: (0)

Any body?

I’m getting a smoke test kit from amazon, may try to find some leaks this weekend would appreciate if some one can give some pointers on where to insert the hose!
Appreciate 0
      10-09-2025, 03:52 PM   #3
b_w.
Major
1215
Rep
1,242
Posts

Drives: ST F80 M3 GT More 6 SPD, F90 C
Join Date: Jul 2022
Location: Alberta

iTrader: (1)

your intakes should not have impacted the charged side. did you touch the charge pipes while you were messing around with this? Could also be poor timing that a charge or j pipe cracked. Do you hear whooshing air when on throttle? You can usually hear a blown pipe in my experience.
Appreciate 2
Schemxr122.00
heymarkv445.00
      10-09-2025, 10:25 PM   #4
namburger
New Member
5
Rep
21
Posts

Drives: e93 335i -> f80 m3
Join Date: Jun 2023
Location: Austin, TX

iTrader: (0)

Thanks. I checked the charge pipes and should be okay but I'll check again. They're the aluminum one since I swapped them out. It'd definitely be poor timing if the j-pipe is the issue but maybe I'll need to do a smoke test and know for sure.
Do you know where my entry point should be for for smoke machine?
Appreciate 0
      10-12-2025, 08:09 PM   #5
namburger
New Member
5
Rep
21
Posts

Drives: e93 335i -> f80 m3
Join Date: Jun 2023
Location: Austin, TX

iTrader: (0)

I tried smoke test and don't see anything.
Also tried cleaning the MAF sensor and I see this o-ring is damaged, I wonder if it's the issue.

Ordered a new set of sensors... Hope this will do it.
Attached Images
 
Appreciate 0
      10-13-2025, 06:09 AM   #6
Tommix
Second Lieutenant
Tommix's Avatar
Finland
69
Rep
205
Posts

Drives: F82 M4
Join Date: Sep 2013
Location: Finland

iTrader: (0)

If replacing the MAF doesn't fix the problem, my next question would be:
When you did that front mounted intake kit is it possible that something happens to front turbo wastegate controller/connector/wiring?
For more information You should check fault codes with ISTA.
__________________
530e xDrive LCI and DCT, MHD Stage 2+ E30, xHP Stage 3, catless DP:s, NGK F8S

Previous: F20 M135 AWD AT 445 bhp, E93 335iA 450 bhp, E92 335iA 650 bhp, E60 535DA, E61 535DA, E34 530iA
Appreciate 0
      10-16-2025, 10:00 AM   #7
Slow M3
Second Lieutenant
Slow M3's Avatar
609
Rep
476
Posts

Drives: F80 M3
Join Date: Jan 2024
Location: Central FL

iTrader: (0)

Is it possible you pinched or shorted the MAF wire or even cracked the vacuum line when you were trying to make the aftermarket part fit? I highly doubt that little scratch on the o-ring would cause any issues.

The thing I dislike about most of these after market intakes is you have stretch or twist the MAF line in some awkward position to get the sensor to reach where it needs to be plugged in.
Appreciate 0
      10-29-2025, 10:35 AM   #8
gcant35
Private First Class
gcant35's Avatar
40
Rep
106
Posts

Drives: 2015 BMW M4
Join Date: May 2021
Location: Alabama

iTrader: (0)

Had the same issue with my front mounts...went back to regular ones under the hood and codes disappeared.
Appreciate 0
Post Reply

Bookmarks

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 06:37 AM.




f80post
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2025, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST