[Mustafa.e92]

Originally Posted by riczon.335i

I wasted a few hours my of life swapping new O2 sensors, spark plugs, coil packs lol. Luckily FCP refunded me for lifetime warranty. My injectors are index 12. Valve cover is barely 20k, my buddy has diagnosed everything even he's confused.

This was me on a customers 535 shit drove me nuts. He had a dealership and bought the car off impact with a front end hit. By the time it was done with body shop and few things we poked around with he was into the car more than it was worth so we called it quits. Anything with a n54 is garunteed to lose money can't ever win with these things 😖

[Mgb1124]

Originally Posted by riczon.335i

It's definitely the Tune I had mine looked over many times by a buddy who owns a BMW shop he could not find anything wrong with my car so MHD needs to figure out what's causing it. I run 92 octane here in Washington State using Shell/Chevron only.

Also flashed back to stock for a few weeks, no mixture lean codes. V9 and V10 maps both mixture lean code pops up. Also I want to note that my car has all parts from FCP so everything has been swapped with new.

I believe most of us can relate to it triggering during highway while my cruise control is set, that's when it throws those codes. I even tried putting my JB4 back in and flashed pump BEF and those codes never came up ever. I just clear the codes now lol, I said F it.

Do both codes come up for you all the time or do you sometimes just get one code because the other day I had both codes and today I just changed my fuel filter/pressure regulator and I'm seeing much better lpfp and hpfp numbers on my logs but I still got a mixture control 2 code https://datazap.me/u/mgb1124/new-fue...&data=3-23

[riczon.335i]

Originally Posted by Mgb1124

Do both codes come up for you all the time or do you sometimes just get one code because the other day I had both codes and today I just changed my fuel filter/pressure regulator and I'm seeing much better lpfp and hpfp numbers on my logs but I still got a mixture control 2 code https://datazap.me/u/mgb1124/new-fue...&data=3-23

Yup both codes and it trips at random times, I can go a week or two and out of the blue while highway cruising it triggers engine code.

I am starting to think it could be the fuel stations having more than the usual ethanol content, makes sense for me on my end.

[Mgb1124]

Originally Posted by riczon.335i

Yup both codes and it trips at random times, I can go a week or two and out of the blue while highway cruising it triggers engine code.

I am starting to think it could be the fuel stations having more than the usual ethanol content, makes sense for me on my end.

Wouldn't more ethanol content make it run better at least that's what from what I heard, but tomorrow I am going with a custom cd919 tune and we will see if that fixes the mixture control

[Mgb1124]

Originally Posted by Mgb1124

Wouldn't more ethanol content make it run better at least that's what from what I heard, but tomorrow I am going with a custom cd919 tune and we will see if that fixes the mixture control

Update: custom tune fixed the problem no more codes car is no longer running lean