[BMW-335i-478]

I have read and researched for the last few months and am at a loss. I have tried almost everything to get the car to run. I have cleaned intake valves, replaced VANOS solenoids, Plugs, Oil change, and now just replaced all 6 coil packs. At about 5800 RPM the car will shutter and buck and as soon as it gets to 6k it will smooth out. I can't get the car to throw a code. I have reloaded my tune twice with my Procede. It will do it on the stock map but not every time. My car 2007 335i coupe has a Procede, DCI, VRSF downpipes, and a custom 2.5" exhaust.

[N54_Fan]

Originally Posted by BMW-335i-478

I have read and researched for the last few months and am at a loss. I have tried almost everything to get the car to run. I have cleaned intake valves, replaced VANOS solenoids, Plugs, Oil change, and now just replaced all 6 coil packs. At about 5800 RPM the car will shutter and buck and as soon as it gets to 6k it will smooth out. I can't get the car to throw a code. I have reloaded my tune twice with my Procede. It will do it on the stock map but not every time. My car 2007 335i coupe has a Procede, DCI, VRSF downpipes, and a custom 2.5" exhaust.

Are you running E85? I have heard of some having sismialr issues with E85.

But other than that sounds like you have done everything except fuel injectors and HPFP. Has you car had these looked at or replaced? If you tell the dealer you are having this problem you may be able to get a new HPFP if it was already replaced because that is under 8 yr 82,000 mile warranty if I recall correctly.

[neilvosko]

Turn off the tune and see what happens. Could be the tune.

[BMW-335i-478]

No E85 yet. I have not taken it to the dealer. I can't get it to throw a code so I am not sure what injector it would be that needs to be replaced. I am driving it around on 0 or stock for now as I dont want to hurt the motor.