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      05-21-2017, 08:45 AM   #1
8400Euphoria
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Car feels sluggish after diff fluid and spark plugs

My car was serviced with new spark plugs and differential fluid. My car doesn't feel as raw prior to replacement. The work was performed by a Bmw dealership. If they made a mistake on something for example on the wiring harness or not tightening the plugs on to the coil. Would that trigger a check engine light for any small error that may have happened ? I also realized now it takes around $8 more of gas for a full tank compared to before.


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      05-21-2017, 11:08 AM   #2
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My car was serviced with new spark plugs and differential fluid. My car doesn't feel as raw prior to replacement. The work was performed by a Bmw dealership. If they made a mistake on something for example on the wiring harness or not tightening the plugs on to the coil. Would that trigger a check engine light for any small error that may have happened ? I also realized now it takes around $8 more of gas for a full tank compared to before.


Thank you
Find a lab that does spark plug and diff fluid sample analysis. The gap OEM plug may be too wide for proper oil lubrication. As for diff fluid, if you hear a grinding sound, then it's your rod bearings.

$8 more in gas huh, that's like 3 extra gallons. I have a feeling you bought a badged M3, when it's really a 528. Could explain all of your problems including the police tearing into your car.
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      05-21-2017, 12:11 PM   #3
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Wing zero,


Wouldn't I get a check engine life if the gaps were too wide for proper oil lubrication?
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      05-21-2017, 12:12 PM   #4
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Light*
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      05-21-2017, 12:54 PM   #5
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      05-21-2017, 01:01 PM   #6
///M Power-Belgium
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Light*
On the seventh day !
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BPM DEV-Tune & DCT software update & Servotronic & coding///Alpine HID Angeleyes///Oem.exhaust mod.
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      05-21-2017, 05:35 PM   #7
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Wing zero,


Wouldn't I get a check engine life if the gaps were too wide for proper oil lubrication?
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      05-21-2017, 07:22 PM   #8
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Oh god...
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      05-21-2017, 07:24 PM   #9
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Never mind guys, I figured it out.
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      05-21-2017, 07:34 PM   #10
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Sooo, what was the issue?
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