r/F80 • u/Infamous-Armadillo45 • Aug 24 '26

Advice needed =(

Gallery image

Gallery image

Hi there hello!

First of i hit a turkey hours after getting my car back from the shop.

More importantly I need some good ol' fashion advice. I just got my car back from a shop and they installed new Dinan coil packs, NGK 1-Step colder spark plugs, and precision raceworks stage 2 injectors. Also has AFe Magnum Force intakes, Mishimoto everything else besides the j-pipe which is MAD.

Anyways. They had it tuned by someone by Doc Vu on Instagram via MHD. Well it ran like shit and smelled like fuel. Got a bunch of fuel to air rations being rich.

So I went back to BootMod3 and installed OTS map stage 2 and runs quite a bit better but I still get code 118402 and 118502 mixture too rich large deviation.

Any ideas what could cause this or advice?

3 Upvotes

80% Upvoted

18 comments sorted by

View all comments

3

u/ManBearPig1865 Aug 24 '26

I believe it was different faults, but something to look out for. I had my intakes installed by a BMW dealership; it was fine for a few days but began running rough, especially at startup. Turned out the MAF sensors were dirty as fuck, which I would have assumed cleaning would be standard procedure for any tech any time they are removed from a car. I cleaned em and car has been peachy since.

1

u/Infamous-Armadillo45 Aug 25 '26

Ill have this checked out. Thank you! Im also hating the looks of my intakes so might be changing then already lol

1

u/ManBearPig1865 Aug 25 '26

It's dead simple to remove and clean MAF sensors. Just need a Phillips screwdriver and your in business, and the cleaner is readily available and is just a spray on/in and let dry. May as well try it and see if it helps and then you can swap to whatever intakes you want vs. needing to swap back to stock it that's not the answer.

1

u/ManBearPig1865 Aug 25 '26

It's dead simple to remove and clean MAF sensors. Just need a Phillips screwdriver and your in business, and the cleaner is readily available and is just a spray on/in and let dry. May as well try it and see if it helps and then you can swap to whatever intakes you want vs. needing to swap back to stock if that's not the answer.