engine running rough

[shimmy23]

i was driving home from the store today; hit the on ramp and the engine starting "pulsing" and ran rough when i came to a stop. i pulled the codes from bimmerlink and got this:

plug or coil?

[stocktree]

Engine? Miles?
Ever change plugs?
You could replace plugs and swap coil 5 with another cylinder to see if problem moves. Then you know if it's the coil.

[shimmy23]

Originally Posted by stocktree

Engine? Miles?
Ever change plugs?
You could replace plugs and swap coil 5 with another cylinder to see if problem moves. Then you know if it's the coil.

50i @41k miles.
i'm thinking it's the original plugs still

[stocktree]

Originally Posted by shimmy23

50i @41k miles.
i'm thinking it's the original plugs still

I'd definitely start with plugs, and perhaps coils. I don't think they cost that much.

[sukhk527]

Definitely start with plugs at that mileage. If you do decide to do coils, I recommend OEM Eldor branded ones.

[shimmy23]

Originally Posted by sukhk527

Definitely start with plugs at that mileage. If you do decide to do coils, I recommend OEM Eldor branded ones.

i ended up getting the Bremi coils. they should be arriving today. i unfortunately read up on the Eldor coils after i had ordered.

[sukhk527]

Originally Posted by shimmy23

i ended up getting the Bremi coils. they should be arriving today. i unfortunately read up on the Eldor coils after i had ordered.

I’d say you’re in for a good resolve either way. Let’s get you running right again

[shimmy23]

thank you all for the help and DIYer threads! i replaced the spark plugs with bosch 8165s and car now runs smooth

here's the bugger!

[Longboarder]

Is that oil on the plug? I can't tell just from the pic.

If it's oil, then the new plug may get covered in oil as well assuming some sort of leak like a valve cover.

[shimmy23]

Originally Posted by Longboarder

Is that oil on the plug? I can't tell just from the pic.

If it's oil, then the new plug may get covered in oil as well assuming some sort of leak like a valve cover.

yah it kinda looks wet but it wasn't that bad.

[stocktree]

Do you baby the engine? Better to drive out hard once in a while to heat up them plugs, so they self clean

[shimmy23]

Originally Posted by stocktree

Do you baby the engine? Better to drive out hard once in a while to heat up them plugs, so they self clean

hmm 🤔 maybe? note to self, romp it once in a while!

[srybicki]

I had this similar issue in FL last year. I had an air leak and shitty gas in FL once back to NJ it's back to normal.

[sukhk527]

Do yourself a favor and run a bottle of LiquiMoly DI Jectron through the next tank of fuel too.

[shimmy23]

Originally Posted by sukhk527

Do yourself a favor and run a bottle of LiquiMoly DI Jectron through the next tank of fuel too.

I always wondered if this stuff (or similiar types) are somewhat of a snake oil kinda thing. I've never seen a convincing article or study done on them. That being said, i've never used it out of fearing it would shake/loosen a particulate in the system and cause issues.