Engine problems

[e30 335i]

Yesterday i degreased my engine bay and have been having problems since. It is an e28 m30b34 engine. Now when the car is idling it is really rough and when i drive it, it just bogs down until 5000rpm then she goes like normal. I am getting spark and have sprayed wd40 on all electrical connections, and removed all spark plugs and checked them. Even when i drive it normally it still jerking back and forth.

Any ideas?

[drift]

Water or excessive moisture on your coil, distributor, cracked vaccum lines and wiring ?

[e30 335i]

Hey drift have checked for moisture everywhere, no vaccum leaks or cracked hoses or anything. Im in the process of going back through things i have recently done on the engine, such as spark plugs and valve clearences. If the valve clearences changed would it cause the problems listed above?