11-12-2009, 12:35 AM
Join Date: Nov 2009
Mein Auto: BMW E60
try this it's easy to do only 5 minutes and solved all your rough idle and check engine light problems on your (2000-2009) later or newer yes! all BMW E60, X3, X5, 325i,330i,335i,525i,528i,530i,535i,... check out the manifold adjuster Google this up.
That appears to have been the problem the whole time. This is what caused the check engine light and O2 sensor fault and misfire codes. listed below are the codes that are caused by a broken Intake Manifold Runner Valve/Adjuster Unit!!!
Ignore these codes after changing your broken or damage Intake Manifold Runner Valve/adjuster Unit these codes will be gone.
P0171 = Fuel Trim, Bank1 System too Lean
P0174 = Fuel Trim, Bank2 System too Lean
P0300 = Random/Multiple Cylinder Misfire Detected
P0313 = Misfire Detected Low Fuel Level
P0741 = Torque Converter Clutch Circuit Performance or Stuck Off
P1083 = Fuel Control Mixture Lean (Bank 1 Sensor 1)
P1085 = Fuel Control Mixture Lean (Bank 2 Sensor 1)
P1342 = Misfire During Start Cylinder 1
P1346 = Misfire During Start Cylinder 3
P1348 = Misfire During Start Cylinder 4
P1350 = Misfire During Start Cylinder 5
P1352 = Misfire During Start Cylinder 6
The adjuster's part description on www.ecstuning.com
Air adjustment unit controls the path of the air in the intake manifold, allowing either a shorter or longer runner length. A common source of trouble causing low RPM sluggishness and accompanied by a clicking sound from the engine bay. The exact symptoms.
Location on driver's side. I already removed the two T40 bolts (upper right and lower middle.) Then simply pull the adjuster unit straight back out towards you. ( 5 minutes)
After removing the manifold adjuster you can also clean your idle control valve (ICV). It's easy to remove the ICV 12 minutes job and clean it with the Throttle Body & Air Intake Cleaner!!!
I can feel the difference in the acceleration and there's no slight hesitation or engine rough idle and after clearing the check engine light it will not come back on!!!