The famous P0300 multiple misfire code..
Thread Starter
Junior Member
Joined: Jul 2017
Posts: 54
Likes: 10
From: Under the stars
E350
The famous P0300 multiple misfire code..
hi all,
My 2011 E350 4matic has the P0300 code along with P0304 and P0306 codes today.
I remove the spark plugs on cylinder 4 and cylinder 6 then physically look at them. No oil, they both look good.
I swap out the ignition coil to cylinder 1 and 3 then clear the code but the car still has rough idle.
is it the O2 sensor or intake manifold air flap is broken? If the air flap, i will get P2187 and P2189 codes right?
The other thing is the fuel injectors.. it's quite a job to get to those.. I don't want to commit to that yet...
Btw, the car has 115k at the moment...
Any help is appreciated..
My 2011 E350 4matic has the P0300 code along with P0304 and P0306 codes today.
I remove the spark plugs on cylinder 4 and cylinder 6 then physically look at them. No oil, they both look good.
I swap out the ignition coil to cylinder 1 and 3 then clear the code but the car still has rough idle.
is it the O2 sensor or intake manifold air flap is broken? If the air flap, i will get P2187 and P2189 codes right?
The other thing is the fuel injectors.. it's quite a job to get to those.. I don't want to commit to that yet...
Btw, the car has 115k at the moment...
Any help is appreciated..
Thread Starter
Junior Member
Joined: Jul 2017
Posts: 54
Likes: 10
From: Under the stars
E350
I swap them and reset the engine light.. haven't seen the problem again yet.. it has less than 50 miles since i did it..
The engine just idle a little different.. i don't know how to describe it but when you drive the same car for so long, you notice the different right away..
It doesn't feel right.. let see if the light pops back up after 100 miles..
The engine just idle a little different.. i don't know how to describe it but when you drive the same car for so long, you notice the different right away..
It doesn't feel right.. let see if the light pops back up after 100 miles..
