Engines vibration

125,000 MILES • 2.5L • 6 CYL • RWD • AUTOMATIC
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VAHIDFARAHANI
  • MEMBER
  • 2 POSTS
Hi
My bmw 525i 2005 M54 engine
Has vibration and bad working after starting the car but there isn't any fault in diagnosis tools.
I have changed spark plugs,coils,fuel filter and pump,injectors,o2 sensors..
Checked timing of engine and all sensors camshafts and crankshaft..Disa,ICV..CCV..air mass
Every things ok but problem is yet
When checking the smooth running of cylinders No.4 is between 2.50...5.60 and anothr ones 0.00 after removing coil No.6...No.4 come down to 0.00 than No.6 goes to 1.80...2.20
Pls help me i tired for pay money and time
Thank's alot
Feb 24, 2016 at 1:44 AM
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WRENCHTECH
  • ✓Experienced Mechanic
  • 20,760 POSTS
Did the plugs on the coils get crossed somehow?
Feb 24, 2016 at 3:33 AM
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VAHIDFARAHANI
  • MEMBER
  • 2 POSTS
All plugs and coils wires are with out fault..today i have changed DME and EWS but it's yet
Feb 24, 2016 at 5:05 AM
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WRENCHTECH
  • ✓Experienced Mechanic
  • 20,760 POSTS
That's not what I asked. Could you have crossed the wiring for the firing order. I have seen that happen.
Feb 24, 2016 at 5:14 AM
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