Hiya,

1st post here, though I've spent a bunch of time on the sister site Pelican Parts forums for Porsche knowledge and addiction support. I recently acquired a very nicely kept '98 E300td, one owner with 68k miles. I'm using it daily as a commuter. The car is running well in my opinion, starts right up hot or cold, no codes or warning lights, seems to have good performance, etc. I've run a few tankfulls of fuel through and am getting ~28mpg with mostly highway usage running 75 mph on average, which based on what I've read online is rather normal.

The one issue I do notice that if I put my right foot down hard, she smokes a decent amount...especially noticeable at night when I've got headlights from a car behind me. It appears white, not black "coal rolling" colored. There is no smoke visible under any conditions other than opening the throttle wide, and rpms from ~2900 up. Part throttle up to about 3000 rpm doesn't create the smoke condition. Idle is smooth, though I have notice an intermittent slight miss/stumble after cold start up. Idle seems perfect when warm.

Where should I start in diagnosing and repairing the smoke issue? Sorry I have no pictures of the car yet.