SROC276

Ok picked up car with new o2 and ran fine for 2 minutes and voila....cel came back on. Brought it back to mb. They forgot to reset adaptation and will hold it overnight for morning start up (usually triggers cels in the past for me). We shall see tomorrow. So far tests this afternoon were fine but big test tomorrow.

SROC276

Done.....result....my carbonio airbox caused a leaner a/f mixture compared to a stock box they tested. Once air box was stock a/f came back down to normal range. there were no leaks near MAF. Funny thing is that Ive run the box for about 15K miles without any issue. I am thinking if it is the box, perhaps there is pin hole sized leak somewhere or it could be the 50/50 100 octane fuel blend I am currently running. AMG tech thinks its the box and recommended I put the stock one back in to get better a/f mixtures.

Any thoughts from you guys being that I have driven without issue for 15k? or do you think it was the recent fuel blend I did?

abcut973

I think it is the box as well. How old is it?
You have somehow a leak pass the MAF. Can you post pics of the interior of your airboxes?
If other members think it is the fuel mix I'm curious to understand the reason.

SROC276

I've had the box in for over a year with 15k logged miles without a single issue. Cel lights just started happening over the past 3-4 months. Yes tech swapped out with stock box and air fuel dropped to normal. When he put it back it rose up to high point of where af needs to be according to amg. It wasn't way out of whack but enough to possibly throw the lean bank code I got earlier this year.

I have not taken it out to see the interior but will do see should the cel come back on in the next 5k miles.

I am thinking the car adaption was still under prior settings as he failed to reset it. After the reset he checked the af and that's when he discovered the leaner af using the carbonio vs the stock boxes. He is assuming this could be a possible cause and recommended switching back.

mr747

Very interesting like you said the boxes may have a pin hole somewhere

I would contact carbonio and send them back

It's funny some people have had issues and some haven't

I was having issues at the start but all is good for the time being

SROC276

Yes I already emailed them asking for a fix in general. Most issues are install related I think because it can be tricky. I had to modify the maf seat on one intake box to make it fit properly so I can see initial issues related to install.


Maybe a method of sealing the box from the inside can help but Not sure. My tech did notice some internal wear near the y pipe on both boxes. Like the epoxy was stripping inside the tube. They recommended removing it and using stocks but may just get the ROW boxes. Again no problems for over year and a lot of miles so not sure what is going on with af when the boxes are on vs stock.

Box is already a bit yellowish due to heat so possible pin hole size leak somewhere.

SROC276

Ok drove the car for 100 miles and we have a new code thrown.....p2240....never seen so many codes thrown in a short time frame. Wondering if something was damaged along the way with all this work done at the dealership. They replaced bank 2 upstream 02 to a new one and now we have this code? P2240 is bank 2 sensor 1.....does this mean it's the one that was replaced?

Idling was poor so was forced to reset on my own today. Going to check boxes today's so far no replies from Carbonio....hopefully I hear back from them soon. Maybe they have something I haven't thought of yet.

avery.whss

i hate to be the bear of bad news, but you're going through exactly what I did, replacing everything that "causes" the problem, don't be surprised if they never figure it out, my CEL would stay off for around 70-100km of driving then turn on while im sitting in traffic

SROC276

Yup I was sitting in traffic too when this happened. It's just odd it happened recently only and not something new. Thinking if gas blend I have been running caused something. Mechanic doesn't think so. It's the only thing new that I've done.

I will sort it out...and keep you in the loop. Time to put on my csi hat.

abcut973

So you don't have a lean code anymore. Just the O2 sensor? Weird.
Put your OEM boxes back and see if it throws a code.

SROC276

Yup this one is a brand new code p2240 and related to o2 bank 2 sensor 1 which I am assuming it's the one they replaced. At idle I am doing 13.2mpg....is this normal? Never watched it before so may be paranoid.

I am going to remove the boxes today to check it. A lot of these codes started happening this year after I started using race fuel 50/50 blend on multiple occasions bringing octane to 94-95. It may also be wear and tear in general.

abcut973

I don't know much about these fuel mixtures (50/50).
Running lower mpg than normal at idle could mean a lean condition. You said you had a rough idle this morning? Usually our cars are really bad mpg wise at idle so i wouldn't totally paranoid on that.
Are you able to monitor your fuel trims?

SROC276

Fuel mix is half tank 91 cot and the other half roughly 8 gallons is 100 octane. Did this no more than 8 times this year only.

I inspected carbonio and there are some chips internally on driver side airbox but no leaks or crack. Looks like black resin has chipped but doesn't seem out of the ordinary. Reinstalled, cleared codes and drive 80 miles at crusing. No cel unit drive was done. Now codes reads p0050 and p2440. Seems to be problem with new o2 they installed or engine harness connection to 02 is broken.

I can't shake this gremlin lol

SROC276

Ok final chapter....hopefully this it it and the gremlin has finally been terminated.....o2 sensor changed to a new one....drove 75 mile again and got a whole new set of codes...9 in total....p0050, p2240 and a couple of P0300's (misfire)......car was running rich, shaky and miserable.

A big shout out to Jeremy from OE tuning who helped guide some areas I never thought to check. Customer support priceless with these guys. he recommended that i check headers and connection to primaries to look for exhuast leaks into the primary o2. No leaks were found.

Brought car back to MB and discovered o2 wasnt connected all the way into wire harness plug....it wasnt clipped all the way in and locked.

Sometimes its the simplest of things....car now apperently working...will see later...fingers crossed

avery.whss

my CEL went off tonight ...no idea why but seems to be staying off not sure why it'd stay on for months then turn off outta the blue lol hopefully both ours stay off for good

SROC276

I would read the code your throwing when it happens. I am sure it's stored in the ecu. 50 miles and so far no cel. Car was a bit sluggish at first probably due to driving it rich for about 30 miles before bringing it to the dealer. Looks like I killed my gremlins but will be driving it for a bit to make sure it's good. Here's total work done under warranty

Intake manifold gasket replacement
Bank 2 (driver side) sensor 1 ( right after header) o2 failure and replacement.

Cel lights: p0174, p2179, p0050, p2240....including 3-4 p0300's which were misfires in bank 2 cylinders.

SROC276

Wow spoke too soon, p2179' p2177, p0174 and p0171, bank 1 & 2 lean.......insane.....95 mile total drive since service.

mr747

What a joke

abcut973

Did you revert to stock boxes?

604 C63

I think you gotta get all Columbo with it. Return ECU and airboxes to stock, put in stock filters and carbons. Then remove or change one at a time until you bingo. If you know what it is, I would imagine that then OE could tune for that. Not sure, but at least then they know exactly what they are working with.

SROC276

I just took them out now and drove for 20 miles, 60 to go. Only thing I never took out during the entire ordeal. Tech seems to think it maybe the cause due to a leaner idle result vs stock box comparison. I emailed carbonio 2x and no response on help in the event it maybe the box and how to repair. I lost some torque and pull with the stock box in my *** dyno opinion so hopefully it isn't the box Haha.

So far idles a little better but exhaust note changed and now deeper. Doesn't rev as fast. In my opinion the boxes do add power just a little stumped as to why after 15-18k miles the crap hits the fan.

Wil post update in a few miles. Body shop tomorrow for my new wing install and some paint work.

SROC276

My car came with one row airbox and a us spec airbox from the dealer. Prior owner did not modify it so I got a freebie. Will test the stock air boxes which are now in the car.

SROC276

SROC276

Final chapter.....

Ok so I drove the car for a month and a half with my new row boxes....no cel lights after 1.2k miles.

Yesterday, I re-installed my old Carbonio's. I removed the old Mafs, cleaned the area and removed old gaskets. I then reinstalled them into their slots, tighten the screw and this time, I sealed the Mafs using hi temp silicon to make sure there are no leaks going through the maf slots. After a year of use and 15k trouble free miles the old gaskets were worn and peeling/ stripping. I figured to seal them. Reinstalled everything carefully.

After 150 miles, cel light galore. All lean bank 2 codes again like before. Not quite sure what to make of it.

Row boxes are back in now and reaching out to vividracing to see if they can deal with carbonio whom have not been responsive to any emails I've sent them about my problem.

mr747

u have a pm mr