hello together. lift today my omi spring suitable. valve cover seal new and cleaned the empty running control and throttle cap. after I put everything together rose bright smoke from the engine room, which moved again, smelled after burnt rubber oil mixed. during the test drive I noticed that he jerked at the speed up and when I turned off the engine a slight “whistle” but which disappeared evenly. at the second start I noticed that short distance away f again a slight whistle sounds, but quickly turns off. what has gone wrong? everything is right in its place, can it be that I accidentally switched the ignition hoses? or are it the residual damping of the throttle cap cleaner? for answers I would be grateful.