Greetings RG,

To save me time in writing this over again, do a search on vacuum pumps or by me in general and read my post about how oil ended up in my air filter housing. If compression is good then the only few items that can wet down your air filter are either worn valve stem seals, a faulty diaphragm in your vacuum pump sucking engine oil into your filter housing or worn valve guides. The Italian tune-up isn't a fix for real problems, but basically just get's rid of accumulated crude in your engine. If your problem is consistant then your solution needs to involve getting your hands dirty not mashing the diesel pedal to the floor.


Charles