[jsans]

Did a walnut blast and put it back together and now when it idles, it jumps and loses power at times. First turn over after 10 mins or longer and it runs fine, idles okay then after i hit the gas a little it does this

[u2b]https://youtu.be/N6VOzi-5XWo[/u2b]

[gabylonfive]

Certain the valves were closed when you blasted the media into the intake ports? Did you replace intake manifold gaskets?

[Taskmaster]

How did you get the gauge sweep?

[Game]

Originally Posted by TheAxiom

How did you get the gauge sweep?

JB4 option.

[jsans]

Yes they were closed and I replaced the intake and throttle body gaskets

[fredcase]

when I did mine I got a misfire and it ran bad for about ten minutes. it went away pretty quick. maybe some shell got into cylinder and messed up a plug. or you forgot to hook something back up?

[DF]

Originally Posted by fredcase

when I did mine I got a misfire and it ran bad for about ten minutes. it went away pretty quick. maybe some shell got into cylinder and messed up a plug. or you forgot to hook something back up?

i got the same thing. Turned out to be an injector

[ThatRWD]

Could be an adaptations reset issue, sometimes when you do that through the JB4 or INPA it goes wack.

[mike@x-ph.com]

I have seen some people damage their LPFP sensor when doing the walnut blast.

Make sure to double check that sensor, this is probably your problem.

[jsans]

Originally Posted by ThatRWD

Could be an adaptations reset issue, sometimes when you do that through the JB4 or INPA it goes wack.

This did the trick. I had to look around how to reset it without having the cable and here's what I found

1. During this process, never touch the brake pedal & keep the key inserted the entire time
2. Insert the key and push the start Button (all idiot lights on)
3. Press and hold gas pedal for 5 seconds
4. Without releasing the gas pedal, push the start Button
5. Release gas pedal
6. Wait a full 2 minutes for the electronics to cycle
7. Start car normally

- http://www.bimmerforums.com/forum/sh...5#post19414645

After I did this, it still had an issue when I did step 7 but I turned it on (not starting the car) and deleted the codes (see below) with the JB4 via Android App and then tried starting the car normally and it turned over and idled great. Took it for a few miles, stopped back at home, let it rest for a bit and tried it again and then drove it for the rest of the day. Thank you ThatRWD!



2CEE Throttle valve actuater, rough running
2D09 Drosselklappe
2D2E Angle of throttle valve - intake pipe underpressure, correlation
2CFE Throttle valve, continuous adaptation
2CFB Throttle valve adaptation value

[ThatRWD]

NP, I have to do that everytime I reset my adaptations with INPA or JB4, although I havn't done it without the JB4 in there. Maybe that's where the issue is.

[Shoooter_j]

Bumping this from way back in case it’ll help anyone. After my walnut blast, had slight surging right away on the hwy, 6th gear MT only cruising at 3k rpm exactly with light throttle. Managed to also stall the car a couple of times from a stop not giving enough throttle - chalked it up to me being lazy.

I’m probably one of the last few still using it, but scanned with the Cobb last night and got a couple of throttle adaptation codes (continuous, adaptation value) 2CFE, 2CFB.

After reading this thread, got inspired to try the Cobb ECU / adaptation reset before INPA to see if it would work. Turns out it did, throttle is much more precise and the car feels even more refined, with zero surging.

[lordnikon]

Sounds like shit

[RealJ22]

Originally Posted by lordnikon

Sounds like shit

Lol?