Ruff runing

[steve]

HI all have a 2002 4.4 range rover bmw engine ya . but started to run ruff when in gear at idel.have auto box
foot on brake put into park engine runs smooth why :confused:

[Joey]

Way too many unanswered questions for me to guess, I know I haven't asked them yet... but here they are.

Mileage?
Last Tune Up? When tune up was done what was done?
Has anything else been done prior to noticing engine issues, including adding a different radio or alarm system?
Type of fuel you use? i.e. regular or premium?

I am sure I will think of other questions, but lets start with these.