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Old 12-28-2018, 06:58 AM
StephenVA StephenVA is offline
Join Date: Jun 2013
Location: Virigina, USA
Posts: 2,491
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Is the #1 plug oil fouled or wet fouling by a faulty injector? A pressure test on the fuel system at rest will expose a leaking injector.
Question: Does this vehicle smoke when warming up or at an idle for more than a few secs? Does it puff oil smoke on idle to hard acceleration? Smoke after idling for 10-15 mins? The last one is valve seals....

Time to do a compression test on a few cyls to determine internal engine health. Oil splashing fouling maybe your symposium to a larger issue. Once warmed up and the oil burned off, the engine runs normal? Inserting a bore scope through the plug hole with the piston all the way down in the cyl will expose the cyl walls. Look for vertical scaring in the walls for busted rings etc. Engine ever run way too hot in the past?

If compression is good, look for valve stem seals cracking and wear. A compression test does not expose this issue only a visual will.

2005 X5 4.8IS
The Blue ones are always FASTER....

Current Garage:
2005 X5 4.8is
2002 M5 TiSilver
2003 525iT
1998 528i
Former Garage Stable Highlights
2004 325XiT Sport
1973 De Tomaso Pantera, L Model
1970 Dodge Challenger T/A 4 sp Alpine White
1970 Dodge Challenger T/A 4 sp GoManGo Green
1971 Dart Sport, “Dart Light” package
1969 Road Runner 383
1968 Ply Barracuda 340S FB Sea-foam Green
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