Need help car jerking

[Adrianmateos]

Hello guys I have a 2007 BMW 335I e93 I’m starting to have an issue when on the road pushing throttle going into fourth or fifth gear it jerks for sec. I will let go of the throttle and goes back to normal I recently did transmission fluid and filter also modifications coldair intake new turbos new spark plugs New coil packs MHD stage 2,intercooler, I don’t think there’s anything wrong with the transmission because it does do smooth changes between gears. Please help thanks in advance.

[Idfkman]

Originally Posted by Adrianmateos

Hello guys I have a 2007 BMW 335I e93 I’m starting to have an issue when on the road pushing throttle going into fourth or fifth gear it jerks for sec. I will let go of the throttle and goes back to normal I recently did transmission fluid and filter also modifications coldair intake new turbos new spark plugs New coil packs MHD stage 2,intercooler, I don’t think there’s anything wrong with the transmission because it does do smooth changes between gears. Please help thanks in advance.

Wrong forum. But, just because the other gears shift smooth doesn't necessarily rule out there being an issue with the trans. Seems like you did a ton at once which will make it much harder to trouble shoot. The n54 guys should be able to help you out.

[randrews15]

Originally Posted by Adrianmateos

Hello guys I have a 2007 BMW 335I e93 I’m starting to have an issue when on the road pushing throttle going into fourth or fifth gear it jerks for sec. I will let go of the throttle and goes back to normal I recently did transmission fluid and filter also modifications coldair intake new turbos new spark plugs New coil packs MHD stage 2,intercooler, I don’t think there’s anything wrong with the transmission because it does do smooth changes between gears. Please help thanks in advance.

I would look at doing a tune for the transmission, or at the minimum scan the transmission module for faults. It should be a ZF tranny and they're pretty stout. I would be curious to know if you did the proper fill procedure as well. Like the other poster said, you may want to get with the N54 guys in the proper forum.

[Adrianmateos]

Ok great thanks guys. I am new here so will try the N54 thanks again for the help

[jp1984]

What about the high pressure fuel pump?

I seem to remember that being an issue on N54's.