First of all run in the engine so that the pistons rings seat properly. If this does not help and if the spark plugs have the correct color, i would take a closer look at the turbo (check if the turbine wheel isn't wet with oil or black, should be grey-ish)
Not saying my situation is similar to your problem, but recently i replaced the pinion bearings (with crush sleeve) due to a slightly too high preload on the solid spacer and perhaps vibrations of the propeller shaft. During installation of the rebuild diff i found that the propeller shaft...
Very nice informative topic. I also rebuild my own diffs. Piratip already gave much useful information. My experience with solid spacer is not great. A crush sleeve works very accurate and worry free. For setting pinion depth i honed out a old top bearing, so i can remove the shaft easily...
Hi, my name is Dave, living in the Netherlands, currently im rebuilding my 88 turbo (1jz) from ground up, which is a FTW big project, supramania gives a lot of info and details, this helps!!
When i find the time i will open a build thread!