[Myn54isSLOW]

Hey guys! I've recently started having some issues with my 335is. It seems to stumble or stutter whenever I crack it up.... It doesn't happen every time though. I can leave the car sitting overnight, come back in the morning and crank it up with no issues. But if I leave the car sitting for like an hour right after running it it will stumble right after it cranks up at about 600~800 RPM. After 1-2 seconds of idling RPM's pick right back up to about 1k~1.2k which I consider normal. I did a walnut blast about 5k miles ago. Also got my Plugs (Bosch) & Coils (Delphi) replaced about 500 Miles ago to see if that would fix the issue... AAAANDDDDD NOPE. SOMEBODY THATS GONE THROUGH THIS PLEASE HELP.

I've included a picture I took of my coils. Coil #1 was unusually yellow. I don't know if that has anything to do with the issue I'm experiencing.

EDIT: I also blew out my chargepipe a couple months ago and replaced it with an aluminum chargepipe from VRSF and kept the diverter valves.

[NoGuru]

Sounds like a leaky injector. Do you know what index they are?

[Myn54isSLOW]

Originally Posted by NoGuru

Sounds like a leaky injector. Do you know what index they are?

Index 12 :

[NoGuru]

Originally Posted by Myn54isSLOW

Index 12 :

Dam, those don't usually leak but it is possible.
What type of fuel are you using?

Do you have MHD? Would be nice to see some logs.

[Myn54isSLOW]

Originally Posted by NoGuru

Dam, those don't usually leak but it is possible.
What type of fuel are you using?

Do you have MHD? Would be nice to see some logs.

Originally Posted by NoGuru

Dam, those don't usually leak but it is possible.
What type of fuel are you using?

Do you have MHD? Would be nice to see some logs.

93 & Nope. I wish there was a better way to describe it.... But it just feels like the engine is bogged down almost to the point where you feel like it will stall upon startup.

[NoGuru]

I recommend getting MHD installed at least to show log files and we can help evaluate what the motor is doing.
You need an Android and a good OBD 2 to USB cable like Bimmergeeks.

I don't recall if using MHD for just data requires any licensing but it's probably the best thing I have purchased (Tunes) for this car.

[Myn54isSLOW]

Originally Posted by NoGuru

I recommend getting MHD installed at least to show log files and we can help evaluate what the motor is doing.
You need an Android and a good OBD 2 to USB cable like Bimmergeeks.

I don't recall if using MHD for just data requires any licensing but it's probably the best thing I have purchased (Tunes) for this car.

I have a MHD installed, I'll have the KDCAN cable tomorrow. I'll keep you posted.

[Myn54isSLOW]

Originally Posted by NoGuru

I recommend getting MHD installed at least to show log files and we can help evaluate what the motor is doing.
You need an Android and a good OBD 2 to USB cable like Bimmergeeks.

I don't recall if using MHD for just data requires any licensing but it's probably the best thing I have purchased (Tunes) for this car.

I have a MHD installed, I'll have the KDCAN cable tomorrow. I'll keep you posted.

[NoGuru]

Yep, make sure you upload your logs to Datazap.me
How many miles on the car? Might be clogged cats as well.

[NoGuru]

Yep, make sure you upload your logs to Datazap.me
How many miles on the car? Might be clogged cats as well.

[NoGuru]

Yep, make sure you upload your logs to Datazap.me
How many miles on the car? Might be clogged cats as well.

[Myn54isSLOW]

Originally Posted by NoGuru

Yep, make sure you upload your logs to Datazap.me
How many miles on the car? Might be clogged cats as well.

https://datazap.me/u/nyn54isslow/335...data=6-8-10-14
https://datazap.me/u/nyn54isslow/335is-0?log=0&data=14

57k Miles on the car. I uploaded a few to that link. Let me know if you can see anything.

[NoGuru]

Originally Posted by Myn54isSLOW

https://datazap.me/u/nyn54isslow/335...data=6-8-10-14
https://datazap.me/u/nyn54isslow/335is-0?log=0&data=14

57k Miles on the car. I uploaded a few to that link. Let me know if you can see anything.

Start logging and then start the car.

[Myn54isSLOW]

Originally Posted by NoGuru

Start logging and then start the car.

Originally Posted by NoGuru

Start logging and then start the car.

https://datazap.me/u/nyn54isslow/sta...=0&data=14

It didn't actually bog down on this data log. It's very random. But let me know if there is anything that stands out. I'll keep logging it every time I start it up until it actually does it.

[NoGuru]

Yep, this one looks fine. Just post one next time it happens.

[Myn54isSLOW]

Originally Posted by NoGuru

Yep, this one looks fine. Just post one next time it happens.

https://datazap.me/u/nyn54isslow/335...38;data=2-5-15

It did it this time..

[NoGuru]

This section logs strange but maybe that is due to the sensors not activating right on start up but taking a second or two to begin reading.

[Myn54isSLOW]

Originally Posted by NoGuru

This section logs strange but maybe that is due to the sensors not activating right on start up but taking a second or two to begin reading.

Hey...

Just revisiting this post.

Turns out the injectors are index 9. I just assumed they were 12. Luckily, I got a letter from BMW about an injector recall. I'm taking my car to the dealership to get those taken care of Wednesday.

[NoGuru]

Originally Posted by Myn54isSLOW

Hey...

Just revisiting this post.

Turns out the injectors are index 9. I just assumed they were 12. Luckily, I got a letter from BMW about an injector recall. I'm taking my car to the dealership to get those taken care of Wednesday.

Oh nice! Get them replaced and let us know how she runs.