drops rpm idle / dies at low rpm once in a while

[lucasio1999]

I have had a problem with my a3 1.8t APP were it drops rpm in idle and.
it also just started dieing when comming to a stop or sitting idling. I only noticed this happen on hot days tho.

I Have been told to check my alternater wireing ill be doing that tommorow. but if that dosent help what whould i look into after.
I found a old thread were someone did some stuff to see if that fixes the issue Listed below.
Should i just follow that list down or is there a better way to tackle it
Auto scan is also listed below.
And took a screenshot of a voltage graph from the car sitting in idle with air, radio heated seats. and so forth turned off, dident touch any thing while it was going.

I have cleaned my throttle body and some of the ground spots i could find.

This list is from another tread
https://www.audi-sport.net/xf/threads/stalls-when-dropping-from-2000-rpm.332924/post-3045361

- check fault codes -> MAF and cam shaft sensor faulty
- replaced MAF
- replaced cam shaft sensor
- replace hockey puck
- replace pcv
- replace DV
- ended up buying a vacuum meter and hooked it up. All is well
- replaced fuel filter
- replaced fuel pump
- hooked up fuel pressure meter --> all is well now
- cleaned the oil out of the intercooler & piping
- cleaned the throttle body

Chassis Type: 8L - Audi A3/S3 (1997 > 2005)
Scan: 01 02 03 08 15 16 17 22 35 37 45 55 56 57 75 76

Mileage: 324240km-201473miles
-------------------------------------------------------------------------------
Address 01: Engine Labels: 06A-906-032-AJQ.clb
Part No: 06A 906 032 S
Component: 1.8L R4/5VT 0004
Coding: 05500
Shop #: WSC 66565
VCID: 2E0506C1790D39BAADF-5160

2 Faults Found:
18084 - EPC Warning Lamp (K132) Circuit
P1676 - 35-00 - Electrical Malfunction
16518 - Oxygen (Lambda) Sensor B1 S1
P0134 - 35-10 - No Activity - Intermittent
Readiness: 0000 0000

-------------------------------------------------------------------------------
Address 03: ABS Brakes Labels: 1J0-907-37x-ESP-F.clb
Part No: 1C0 907 379
Component: ESP 20 CAN V005
Coding: 18945
Shop #: WSC 06435
VCID: 678BB3E59677A8F2AE9-4B1E

No fault code found.

-------------------------------------------------------------------------------
Address 15: Airbags Labels: 8L0-959-655-AI8.lbl
Part No: 8L0 959 655 G
Component: Airbag Front+Seite 2008
Coding: 00104
Shop #: WSC 06435
VCID: 42DD4271DD95ADDA597-5160

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments Labels: 8L0-920-xxx-17.lbl
Part No: 8L0 920 930 C
Component: KOMBI+WEGFAHRS. M73 D17
Coding: 00044
Shop #: WSC 00068
VCID: 2E0506C1790D39BAADF-4B1E

Subsystem 1 - Part No: Ident
Component: Nr. Wegfahrs.:AUZ5Z0B5146050
Ident.-Nr. Wegfahrs.:AUZ5Z0B5146050

No fault code found.

-------------------------------------------------------------------------------
Address 35: Centr. Locks Labels:. 8D0-862-257.clb
Part No: 8L0 862 257 K
Component: ZV-Pumpe, Funk D06
Coding: 12864
Shop #: WSC 06335
VCID: 3D27318DA46BD222245-4EC8

No fault code found.

End----------(Elapsed Time: 03:38, VBatt start/end: 13.5V/12.8V)-----------

 

[lucasio1999]

Also happens if i press any buttons. ex windows.

 

[NHN]

And the battery has been tested ok?

 

[lucasio1999]

And the battery has been tested ok?

I dont think i have, will get that done asap.

 

[NHN]

Sounds like it's dying due to power if using buttons.