animal_63518

E63 rough idle, p0017,p0300,p0301,p0302,p0303,p0304

parked the car and next start came on with very rough idle and flashing check engine light...

have changed all four intake and exhaust camshaft sensors..

swapped a new coil from cyl1 to cyl2 no change, due to weather here tomm will swap all four coils to the other side and vice versa, but i dont think its the coils...

71k miles currently, car has purred the past 6yrs ive owned it since 34k miles, always maintained

animal_63518

just tried to see a difference with maf sensor unplugged, still rough idle and a maf sensor code so maf sensor is not the culprit

Solo wing

Maybe o2 sensor, timing problem (Camshaft adjusters), or a leaking intake manifold gasket. If the gasket is the cause, don't forget to replace the PCV at the same time.
Good luck

animal_63518

thanks for the input, thats my next move is swapping the primary o2's, will update when i get to it... tooo cold today id end up stripping a thread and having to buy a new o2

hoping its not a stuck solenoid in the adjusters.. and def not hoping its a gasket, but would be nice to refresh that area along with pcv since she is old at 71k miles now

Celicasaur

Any updates?

animal_63518

yesterday i swapped the upstream o2 sensors, excited, but then quickly shot down when i started her up and same symptoms same passenger side bank... codes cleared by scanner

when i removed affected side o2, it smelled of gas kinda strong out of the manifold o2 hole

next step is getting a tow to stealership, its snowing here today

will keep yall updated

Celicasaur

Out of curiosity, I'm assuming you've checked the coolant reservoir (and was terrified in doing so) to verify all is well on that front?

animal_63518

hahah, yes i checked that, teal as carribean ocean... since ive owned the car, 6yrs, 34k to 71k.. ive always topped it off and havent gone thru a gallon yet

funny bc i have dump trucks and currently at the moment one is loving sludge of oil in the coolant

Celicasaur

Thank God. lol i was trying to think of the nicest way to ask that rather awkward question that every M156 owner dreads.

hachiroku

good luck.

animal_63518

turns out to be a stuck cam adjuster solenoid on the affected passenger side bank

dealer forced the solenoid to actuate with star, and continues to run fine now, back to normal... no parts replacement

Celicasaur

Great news man, really happy for you and thanka for sharing the solution with us all

animal_63518

yes definitely a relief in my pocket....

i will be putting her up for sale soon, fell in love with a C63s coupe

hachiroku

so after they told it to move using STAR, it is no longer sticking? if so that's good to hear.

animal_63518

yeah basically, i suggested replacing the adjuster solenoids ($600 parts and labor), but was advised that would be a waste of money...

been driving her all day, runs like nothing ever happened

its time to invest in Star for myself

Sandpit

Just had a similar experience, but turned out to be the #6 coil pack causing all the problems.

Damn terrible feeling when it starts doing this - visions of expensive problems right away!

animal_63518

loll i know the feeling.. glad it was a simple fix