So Ive had a problem since a few days ago, like 3 after I put my k04 turbo in that there is a boost issue.

When I step on the gas on full throttle it shake/ bogs veryu hard and the boost fluctuates. I can hear what sounds almost like a pop and then a woosh, almost as if the dv cant hold the air back from being recirculated back into the intake.

Ive been getting horrible gas mileage, and the jerking can be scary sometimes as I dont expect it. Ive been reading a lot to see what it is between the dv and the n75 and it almost looks like both. im going to order a 710n soon, I just want to verify here first.

Here are 2 videos I took today to illustrate it. I am steady on the throttle when it happens, and I do let off then get back on.

http://www.youtube.com/v/3rlsCysUYo4&hl=en_US&fs=1&"]http://www.youtube.com/v/3rlsCysUYo4&hl=en_US&fs=1&"]http://www.youtube.com/v/3rlsCysUYo4&hl=en_US&fs=1&

http://www.youtube.com/v/JywVkLIBxaM&hl=en_US&fs=1&"]http://www.youtube.com/v/JywVkLIBxaM&hl=en_US&fs=1&"]http://www.youtube.com/v/JywVkLIBxaM&hl=en_US&fs=1&

 

Your links aren't links and I'm too lazy to cut and paste from my droid. But from your description it sounds like the sb needs to be upgraded. Also check that your MAF was put back on facing the proper direction

 

Dunno how that angry face got there, and by "sb" I meant "dv" sorry my fone corrects **** on me

 

Well, I know you're supposed to upgrade the dv when you up the boost since the stock spring is too weak for the piston. I think the majority of your problem is that you need to upgrade the ecu. It sounds like you're not getting enough fuel. If it were only the dv then the boost leak would usually cause the engine to stall.

 

Well the thing is Im running stock boost, so I see no need for upgrading the dv. Unless changing the turbo upgrades the dv.


Also I want to get an ecu/ tune but all I can find them for is k03's. Any input?

*linked url's*

 

Upgrading the dv is always a good idea though, even with everything being stock. Mine needed to be replaced recently after I realized it was the reason why I had a boost leak. As for a chip, I think ecstuning.com might have something for the k04 but I'm no sure.

 

K04 is so similar to K03 that it alone shouldn't kill a DV, but the DV could just be so old that it's worn out. It could be the problem. There are methods to test the DV - search for them.

 

On the same ECU tuning you will actually see more boost on a K04 then you do a K03, this is because the wg settings are different on the 2.


A4 2000 - this is why the car has a MAF sensor, it tells the ECU when there is more air and the ecu adds more fueling for that.


Desert Fox - not hard to find a K04 tune used or you could just call up a tuner and GIAC dealer for a K04 tune. Plenty dealers in Norcal for that. If you want I am more then welcome to call GIAC directly and ask about a chip for your car.

A bad BPV wouldn't cause bad gas mileage unless it was cracked causing the air to leak out of the system.

Did you unplug the battery when you installed the K04?

 

+1 for MAF. Could be on backwards or could be bad all together. My car had some scary jerking going on before I replace mine. After I replaced it, it was smooth again.

 

if it turns out to be the ecu i would recommend GIAC as well, they make a KO4 spec and whats cool about them is their software can be updated and upgraded as appropriate. i know somebody who can chip your car in Sonoma if you are curious. either $450-$500 i forget