[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.

[DenverSteve]

Sorry. Not enough information - for on line diagnosis. I would think maybe torque-converter. However, with that great car, I would take it to the dealership and have it diagnosed expertly. We don't know you're mileage or other issues but take a look at the High-Pressure Fuel Pump as it is a known issue with these cars.

[Adrianmateos]

Ok great thanks. The car has 16000 miles no other issues just the pulling at high speed and it doesn’t do it frequently just once in a hot summer day