[sirudropsmth]

Hello everyone,
BMW F11 530d 190kw xdrive

The problem is when driving at 100-120kmh. The car is running at 1.1-1.3 RPM in eighth gear, when going up a small hill the car starts to jerk, when shifting to a lower gear in manual mode the jerk disappears. This also happens when driving on a straight road, if you start to press the acceleration easily the car start jerking and when RPM is higer than 1.5k RPM it’s all gone. Any ideas? ;(

[ChiltiCoatl89]

How many Miles do you have and has the transmission Fluid ever been changed?

[sirudropsmth]

190000miles. Yes, when I bought a car I changed oil at service immediately, after 40000miles changed again.

[ChiltiCoatl89]

How small of a hill are we talking? Its not wise to put strain on your higher gears on low RPM going up an incline.

[sirudropsmth]

We are talking about very small hills, 5-10% gradients on the highway. As I mentioned before, this also happens when driving on a flat road with the cruise control activated at a speed of 110 km/h and a gentle press on the accelerator pedal, then the car starts to shake, as if you were driving a manual gearbox in fifth gear at 50 km/h. But like I mentioned before everything gone at 1.4-1.5rpm, or manually put from 8 to 7 gear. Maybe it could be the throttle body when it is almost closed and not enough air?

[ChiltiCoatl89]

You do not have any drivetrain codes present?

[sirudropsmth]

No, i don’t.

[ChiltiCoatl89]

Have you replaced anything in regards to your air intake? I.E Intake Plumbing and even gaskets and o rings?

[sirudropsmth]

The air intake manifold was removed and washed in an ultrasonic bath. That's all.

[ChiltiCoatl89]

How recent was that and any gaskets replaced? When you changed the transmission fluid, were you aware of an adaptation reset?

[sirudropsmth]

Originally Posted by sirudropsmth

about 15000 miles ago. About the gaskets I can’t tell you, because all these jobs do a service which repairs only bmw cars. Yes i know about adaptations reset, this was done after an oil change.

[ChiltiCoatl89]

Ignition, Air, and Fuel I would narrow out first.

[ChiltiCoatl89]

How do your intake valves look? where they ever walnut blasted?