ive been made to look like a weenie

[1madmarauder]

as some of you know, i have recently purchased a 03 300a and was inquiring on here about a transmission problem i was having. i mentioned that the dealer blamed the problem on the cars ONLY mod, a k&n aircharger, part #63-1111. i argued with the dealer that a intake could not be the problem. they would not look into problem under warranty with the k&n installed. so, seeing as i bought the car with the k&n and no stock airbox, i had to buy one. i put in on last night and im telling you guys, the problem fixed itself in 15 miles or so. i cant believe it still, but its true. anyone else ever have this happen before. i dont even know what to say, ive never been impressed with the level of intelligence with the dealer monkeys, but i have to admit i am truly humbled....................... ........................:rolle yes:

[dwasson]

Oh that sucks.

I think that maybe you bumped something putting on the new airbox... yeah, that's my story and I'm sticking to it.

[juno]

Did you pull the Negative battery cable when you installed the stock box?

Just wondering if the 'puter reset itself and solved your problem.

Try putting the K&N back on. :)

[metroplex]

Actually, the airbox is important because the airbox and MAF are calibrated as a unit, and the MAF transfer function DOES affect shifting. The MAF transfer function is used by many other functions as well.

[Breadfan]

Actually, the airbox is important because the airbox and MAF are calibrated as a unit, and the MAF transfer function DOES affect shifting. The MAF transfer function is used by many other functions as well.

If thats the case, putting the K&N back on and, and letting the battery sit disconnected will reset the mappings in the computer and force a MAF relearn. Will run rougher for a few miles but will relearn the MAF with the K&N in place.

I had no adverse issues with my intake.

BTW, hpoe you didn't pay too much for the stock setup, I've got my stock setup in a box and coulda' let you borrow it...

[juno]

Actually, the airbox is important because the airbox and MAF are calibrated as a unit, and the MAF transfer function DOES affect shifting. The MAF transfer function is used by many other functions as well.

Good point, so another question, did the K&N include a MAF? Was it positoned correctly or working correctly? Some are very sensitive to relative position. Is it possible the previous owner installed the K&N wrong?

[sweetair]

Good point, so another question, did the K&N include a MAF? Was it positoned correctly or working correctly? Some are very sensitive to relative position. Is it possible the previous owner installed the K&N wrong?The K&N I have did not come with a MAF sensor if thaqt is what you mean. You reuse the OEM one. I have not had a issue w/mine, but you do have to separate the PCV and IAC lines w/ the K&N. On the OEM air box they are together. Good luck..........

[1madmarauder]

ive already been through all the negative terminal disconnect stuff. i thought that would cure it when i bought the car. im not joking, the stocker really fixed the ailment. i am really skeptical about all this. ill have to put the k&n back on to see what it does now........................... ..still bizarre though!

[jdando]

When I installed my K&N I had no driveability problems. I was using a SCT 1725 tune at the time,

I am surprised it is giving you a problem.

jeremy

[Blackened300a]

Thats a new one! I havent had any issues with my Airbox and I didnt have a tune when I installed it too

[juno]

I do not have a K&N on the MM. Do they address a specific orientation for the MAF? I would think it would be as close as possible to stock. Did you notice any orientation difference between the two?


The K&N I have did not come with a MAF sensor if thaqt is what you mean. You reuse the OEM one. I have not had a issue w/mine, but you do have to separate the PCV and IAC lines w/ the K&N. On the OEM air box they are together. Good luck..........

[David Morton]

Maybe the PCV system was hooked up wrong. The MAF sensor needs to account for all the air going into the engine and some guys get the idea that the PCV can vent from atmosphere rather than from upwind of the MAF in the intake stream and that can have a big and intermittent effect on all PCM calculations.

The PCV vent hose must be from the filtered air in the intake hose after the MAF sensor has measured it.

[BAD MERC]

There are a lot of things that the dealer will automatically blame on aftermarket goodies. Stereos, alarms and speakers will ALL make your battery die. Pinstriping and VentVisors cause window regulator issues. The Magnusson-Moss act has allowed to aftermarket to make accessories for vehicles without fear of warranty cancelletion. I am sure that the air filter had ZERO to do with your issues, it may have been an amazing coincidence. Drive it for a month and then re-install the K&N and see what happens...

[metroplex]

They'll blame the factory paint color for the paint peeling off!

But in all seriousness, a lot of vendors will claim the adaptive fuel trim will fix any problems that may arise from using a cone filter/hot air induction. That is true to a certain extent. It is best to get the proper transfer function. Resetting the PCM's KAM will only erase the adaptive fuel trims that it learned, it will not affect the transfer function!

Some people don't experience any problems using the wrong MAF transfer function: i.e. aftermarket air intake with factory MAF and factory MAF function.