Question about 2007 BMW 525xi Sedan

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525i engine runs very rough, seems like one or more cylinders is not working. Checked plugs a couple had black souit on the tip of new plugs.

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  • 7785ds Jun 08, 2009

    It barely starts, then barely runs. Have to slowly increase pedal pressure above 3k to get it to run somewhat smoothly, if I let up off the gas pedal it misses until it quits running.

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Similar problem.. seems as engine is rough running, almost like running on 5 cylservice engine light soon in yellow turned on. the car has 78k, just purchased, is this a bad sign..?

Posted on Oct 04, 2012

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Dirty injectors.add fuel additive to fuel tank.Buy a good brand of additive

Posted on Jun 08, 2009

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What is the most like solution to po302 cylinder 2 on bmw 525i...check engine not flashing but stays on...riding a little rough


P0302 - misfire on #2 cylinder . Could be a bad spark plug , spark plug wire , or a bad ingintion coil , a bad fuel injector etc.... There are videos on youtube that could help you sort this out .

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1990 4runner


A couple of possible problems, low compression on one or more cylinders, possibly a burned valve, possible headgasket leaks, have the compression tested and checked for a headgasket leak, both of these conditions would cause a rough idle and then seem to run normally when warmed up.

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Lets start at the beginning. Did anyone check fuel pressure before and after replacing the pump ?
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Engine runs really rough for about 10 mins., then runs smooth until I turn it off, then rough again


Power is reduced, oil when the engine has a stuffy as small hammer knock. Serious damage the crankshaft and connecting rod, and even lead to piston broken, hurt the body and the cylinder head. Recommended maintenance as soon as possible.more go hobd2

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replace fuel filter, clean fuel injectors.could have bad fuel, do a code scan before buying new parts.faulty egr valve or faulty engine coolant temperature sensor cause engine run poorly.replace spark plugs and wires because if spark plug wires is bad or spark plug and ignition coil is bad that will cause rough idling misfiring and stalling you have dead cylinder not firing properly..

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Have multiple issues with the 1998 Audi A6. It started running rough and the check engine light came on. Auto Zone checked it an said 4 cylinder were misfiring. Installed new plugs and wires and the same...


4 cylinders misfiring? Did the new plugs and wires correct the problem? If so, for how long?
Was oil coming out of the cracked hose?
We Need more information in order to diagnose this problem.

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