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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio > Significant Decrease in Performance



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      11-09-2024, 12:27 AM   #1
Dpac07
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Significant Decrease in Performance

So I have a 2009 BMW 328I, has the N52KP, black top, no disa, completely stock, but I've been experiencing sluggish and slow acceleration, like I'm talking about an average of 12.7 second 0-60s, car is up to date on maintenance and no cel, but I did get 2 ghost codes in inpa, 2AA8 and 2AA9, which is weird because one of these codes involves disa, which i don't have, but the other one is vanos, so I took a look at values of disa while the car was warmed up idling, here's a picture. What should I do? Replace VANOS?
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      11-09-2024, 12:43 AM   #2
Brandoch
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Quote:
Originally Posted by Dpac07 View Post
So I have a 2009 BMW 328I, has the N52KP, black top, no disa, completely stock, but I've been experiencing sluggish and slow acceleration, like I'm talking about an average of 12.7 second 0-60s, car is up to date on maintenance and no cel, but I did get 2 ghost codes in inpa, 2AA8 and 2AA9, which is weird because one of these codes involves disa, which i don't have, but the other one is vanos, so I took a look at values of disa while the car was warmed up idling, here's a picture. What should I do? Replace VANOS?
It has one disa.
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      11-09-2024, 01:06 AM   #3
Dpac07
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Quote:
Originally Posted by Brandoch View Post
It has one disa.
It does? Are you sure because I looked and I swear I couldn't find it
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      11-10-2024, 12:12 AM   #4
Dpac07
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I just check now, the car had a 330i tune so both 2AA8 and 2AA9 are faulty ghost codes, so technically i have no codes at all, but when I check my cats, header 1 warmed up was 427 pre cat and 350 post cat, for the other header it was 300 pre cat and 350 post cat. Any idea if it could be a bad cat?
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      11-10-2024, 12:33 PM   #5
marvinstockman
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AFR?

LTFT?

STFT?

Is trans shifting as it should? Go to manual mode, and start in first!
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      11-10-2024, 12:35 PM   #6
marvinstockman
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Also, do a controlled highway test of mpg, say 50 miles at 60 mph. Fill before test and fill immediately after.
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      11-10-2024, 02:32 PM   #7
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Quote:
Originally Posted by Dpac07 View Post
... 2009 BMW 328I... in inpa, 2AA8 and 2AA9, which is weird because one of these codes involves disa, which
i don't have [please clarify this] ...
Both the 2AA8 & 2AA9 Codes are DISA, one for each Servomotor; 8 is for Servomotor 1 & 9 is for Servomotor 2. Here
are Links to BMW Fault Code Lookup Info Sheets for each:
https://bmwfault.codes/XMLDiagView?d...E4NjU3MTYwNQ==
https://bmwfault.codes/XMLDiagView?d...E4NjU5NzIwNQ==

Your VANOS Cam Angles & Deviation from Target Values (Sollwert) are fine. NO VANOS issue.

I would suggest viewing & attaching ScreenPrint of Fault Code with Freeze Frame Data for EACH 2AA8 & 2AA9.
Here is the INPA Menu Sequence/ Path to view that data:
INPA > MSV80 DME > F4 > F1 > F3 Fault Memory with Freeze Frame Data

Quote:
Originally Posted by Dpac07 View Post
I just check now, the car had a 330i tune...
I don't have DISA on my 3/2007 build 328xi. Attached is a ScreenPrint of the DISA Activation Screen:
INPA > MSV80 > F6 Activations > F1 Group 1 > Shft+F6 Activation DISA
My screen shows the default value for NO DISA valves & indicates NEITHER is available for activation. Both are Closed (33%)

Either you have DISA & neither valve is functional, OR the DME coding is for DISA but you have NO valves.
Please attach ScreenPrint of YOUR INPA "Shft+F6 Activation DISA" Screen.
George
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      11-10-2024, 08:36 PM   #8
Dpac07
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Quote:
Originally Posted by marvinstockman View Post
AFR?

LTFT?

STFT?

Is trans shifting as it should? Go to manual mode, and start in first!
I'll check my AFRS and Fuel Trims thanks!
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      11-10-2024, 08:38 PM   #9
Dpac07
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Quote:
Originally Posted by gbalthrop View Post
Both the 2AA8 & 2AA9 Codes are DISA, one for each Servomotor; 8 is for Servomotor 1 & 9 is for Servomotor 2. Here
are Links to BMW Fault Code Lookup Info Sheets for each:
https://bmwfault.codes/XMLDiagView?d...E4NjU3MTYwNQ==
https://bmwfault.codes/XMLDiagView?d...E4NjU5NzIwNQ==

Your VANOS Cam Angles & Deviation from Target Values (Sollwert) are fine. NO VANOS issue.

I would suggest viewing & attaching ScreenPrint of Fault Code with Freeze Frame Data for EACH 2AA8 & 2AA9.
Here is the INPA Menu Sequence/ Path to view that data:
INPA > MSV80 DME > F4 > F1 > F3 Fault Memory with Freeze Frame Data



I don't have DISA on my 3/2007 build 328xi. Attached is a ScreenPrint of the DISA Activation Screen:
INPA > MSV80 > F6 Activations > F1 Group 1 > Shft+F6 Activation DISA
My screen shows the default value for NO DISA valves & indicates NEITHER is available for activation. Both are Closed (33%)

Either you have DISA & neither valve is functional, OR the DME coding is for DISA but you have NO valves.
Please attach ScreenPrint of YOUR INPA "Shft+F6 Activation DISA" Screen.
George
Yeah I think I just have no valves but those codes are popping up due to me putting a 330i tune making it trying to trigger disas
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      11-10-2024, 09:09 PM   #10
Dpac07
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These normal?
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Last edited by Dpac07; 11-11-2024 at 12:34 AM..
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      11-11-2024, 07:38 PM   #11
Dpac07
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