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Discussion Starter #1
Alright I have an 2008 550i recent was given me the same problem so I change the spark plugs and coils was running good valve is leaking oil I***8217;m replacing that soon but today started to shake at idle again rpms stable and muffler sounds clogged I was thinking might be a faulty spark plug but they are new and was running ok started to do it after I had to rush today so I accelerated and started to do that after a good run any suggestions?
 

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12,940 Posts
plug your NT510 scan tool that you haven't bought yet in to the obd port on the left side and communicate with the vehicle...
Then come back
 

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Discussion Starter #3 (Edited)
Alright got me one p0302 and p0303 showing what could of caused this two to go out they are new I have p0128 by the way it has been loosing coolant I got me a block leak tester to see if headgasket might of had gone out but no seemed fine .
 

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ok so your misfireing on cylinders 2 and 3, and you have a map cooling/ thermostat fault

your engine is probably colder then your computer thinks.. and you mixture is messed up..

confirm your engine coolant temp and thermostat

IF your leaking coolant, you need to address that as a priority
 
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