Back Pressure From Filler Cap

[enigma-man]

:ffs: hi just wondered if any one has expereanced this problem on there emina's? i thought i had an oil leek and for week's could not find the leek on the n/s of the engine just arround the oil filler. so just by chance i took of the water pipe over the oil filler cap and underneath it is a little oil return pipe that had come off at the point where the oil go's back into the filler cap. now as i said this oil leek has taken week's to find .could this pipe have come off through back pressure and can i get the engine tested for this problem without it being an arm and a leg ?also the the passenger door light has gone off i have power to the unit but look's like the pcb has chucked it can i get a new or secound hand unit ( middle door ).power going into the board but nothing coming out is it worth reparing ? :!Removed!: