2 Cylinders dont work

[Tomas]

Hi, my engine is M52b28TU(dual vanos) and problem is: 2 cylinders dont work and max rpm when hiting pedal first time is 6k than engine starts to vibrate and max rpm is 4k. I cheked injectors - they are ok, i changed 1 lambda sensor, Spark plug sockets are ok too.
BTW: before hiting pedal to the metal everything is ok.

What could be wrong?

[jlevie]

It rather sounds like the DME is detecting multiple misfires on one or more cylinders and then shutting the affected cylinders down. Once shut down, a cylinder will stay shutdown until the engine is shut off and re-started.

Potential causes include intake leaks, injector problems, coil/boot/plug problems, flaky intake cam sensor, or a flaky crank position sensor. There may be fault codes stored in the DME that can help with the diagnosis.

[Tomas]

Thanks!