So I'm working on narrowing down whats causing the misfires on cylinders 4 and 5.
#Fuel pump was changing 2k miles ago.
#Fuel Filter, Oil, Oil Filter, Air filter was changed 1k miles ago.
#Spark plugs were changed less than 900 miles ago.
MPG has greatly improved, shifts better, and when the cylinders misfire, it doesn't shake so bad, it used to turn off if I let it idle, now it hangs in there, waiting for me to turn it off and turn it back on so the computer will start giving the off cylinders, fuel again.
With that out of the way, I need narrowing down what is causing exactly cylinders 4 and 5 to misfire.
Three days ago I swapped the coils, the misfires didn't follow the coils, still misfiring.
Now, the misfires are only triggered at high RPMS, 4500+ usually on 30+mph, pretty much when I floor it past the normal stop point of the gas pedal and the engine is aiming for 6500 to shift up.
I can drive easy on it for a long while and not trigger a single misfire, provided I don't push it past 4k rpms, but if I do, to overtake, the check engine light immediately flashes on and I have to restart the engine to restore fuel to cyl 4 and 5.
I swapped the spark plugs around... I don't think that its them since they are new, and it'd be too much of a coincidence that I put a new faulty spark plug in a cylinder that was already misfiring PRIOR to doing any coil swapping or putting in new spark plugs.
I've spent over 8 hours reading different posts.
With that in mind I've come to the conclusion that since it is so specific to these two cylinders time and time again ( I've cleared the codes 6 times now ) I want to swap the injectors, however, this is where I need some help, I haven't found any DIY for "FUEL INJECTOR SWAP" and youtube didn't yield any help for the m54 e46 engine. If you know a video or tutorial that will help, I will be very thankful.
Now, based on the information researched, this could also be due to a vacuum leak (hence the P0171 ) But why so dead set on these same two cylinders! :mad: hahaha
But i'm just not sure.. I think its something closer to cylinders, (fuel injector pops to mind again) But i'm no no expert.
Now, about the P0133, I don't know whats up with that, that code eventually clears away from being a Pending fault, to disappearing completely from the fault log.
Any thoughts are very much welcomed! :thumbup:
Sorry for the long post
Sent from BimmerApp mobile app
#Fuel pump was changing 2k miles ago.
#Fuel Filter, Oil, Oil Filter, Air filter was changed 1k miles ago.
#Spark plugs were changed less than 900 miles ago.
MPG has greatly improved, shifts better, and when the cylinders misfire, it doesn't shake so bad, it used to turn off if I let it idle, now it hangs in there, waiting for me to turn it off and turn it back on so the computer will start giving the off cylinders, fuel again.
With that out of the way, I need narrowing down what is causing exactly cylinders 4 and 5 to misfire.
Three days ago I swapped the coils, the misfires didn't follow the coils, still misfiring.
Now, the misfires are only triggered at high RPMS, 4500+ usually on 30+mph, pretty much when I floor it past the normal stop point of the gas pedal and the engine is aiming for 6500 to shift up.
I can drive easy on it for a long while and not trigger a single misfire, provided I don't push it past 4k rpms, but if I do, to overtake, the check engine light immediately flashes on and I have to restart the engine to restore fuel to cyl 4 and 5.
I swapped the spark plugs around... I don't think that its them since they are new, and it'd be too much of a coincidence that I put a new faulty spark plug in a cylinder that was already misfiring PRIOR to doing any coil swapping or putting in new spark plugs.
I've spent over 8 hours reading different posts.
With that in mind I've come to the conclusion that since it is so specific to these two cylinders time and time again ( I've cleared the codes 6 times now ) I want to swap the injectors, however, this is where I need some help, I haven't found any DIY for "FUEL INJECTOR SWAP" and youtube didn't yield any help for the m54 e46 engine. If you know a video or tutorial that will help, I will be very thankful.
Now, based on the information researched, this could also be due to a vacuum leak (hence the P0171 ) But why so dead set on these same two cylinders! :mad: hahaha
But i'm just not sure.. I think its something closer to cylinders, (fuel injector pops to mind again) But i'm no no expert.
Now, about the P0133, I don't know whats up with that, that code eventually clears away from being a Pending fault, to disappearing completely from the fault log.
Any thoughts are very much welcomed! :thumbup:
Sorry for the long post
Sent from BimmerApp mobile app
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