This morning I changed my oil, and replaced my airfilter, and when I reinstalled everything and started the car it felt like my MAF was way out of spec. (misfire codes, lean running codes) so I went through everything again and found that one of the plugs ontop of the airbox were loose. (my bad) I believe it was the passenger side plug closest to the front of the car. What are these plugs doing?

 

hopefully this will help MAF sensor would be my guess







Servicing Motronic injection system[/align]Fitting locations overview[/align]










â—†Diagnostic connector

â—†Fuel pump relay
(relay position 4 in central electrics under dash panel insert, left hand side) [/ul]

4 pin connector

â—†For lambda probe 1 (G39) [/ul]
3 pin connector

â—†For knock sensor 1 (G61) [/ul]
Coolant temperature sender (G62)

â—†On coolant pipe behind cylinder head, Bank 1 [/ul]
Throttle valve control part (J338) [/ul]










Intake air temperature sender (G42)
Intake manifold change-over valve (N156)
4 pin connector

â—†For lambda probe 2 (G108) [/ul]
3 pin connector

â—†For engine speed sender (G28) [/ul]
3 pin connector

â—†For knock sensor 2 (G66) [/ul]
Engine control unit (J220)
Fuel pressure regulator[/ul]










Hall sender (G40)

â—†Cylinder bank 2 [/ul]
Lambda probe 2 (G108)
Engine speed sender (G28)

â—†In gearbox housing above starter ring gear [/ul]
Knock sensor 2 (G66)
Camshaft adjustment valve 2 (N208)
Ignition coils (N, N128, N158)

â—†With output stage (N122) [/ul]
Knock sensor 1 (G61)
Injector (N30...N33, N83, N84)
Hall sender (G163)

â—†Cylinder bank 1 [/ul][/ul]










Lambda probe 1 (G39)
Earth connection

â—†On engine support, right-hand side [/ul]
Camshaft adjustment valve 1
(N205)
Air mass meter (G70)
Activated charcoal filter solenoid valve 1 (N80)

â—†On air cleaner [/ul][/ul]

[IMG]local://upfiles/12092/BE20F58D5D8D40BFBDAF65C7E2C90822.jpg[/IMG]

 

Yeah, I got the problem fixed. I saw the plug loose and plugged it back in and everything back in. Thanks for the sheet

 

They are ignition control amps. One for one bank, & one for the other.

 

that picture looks like it's a 12v 2.8L