Nissan Repair: Starting and stalling, phillips screw, 240sx

Question
I own a 1989 240SX, 5spd 2.4L KA24E, the car has trouble starting sometimes, not all the time, or even at sametimes (starts in mornings sometimes and not others).  When having trouble it cranks just fine, but doesn't want to turn over.  Accompanying the rough starting the car wants to stall out while idling (bobbling idle) and most noticeable when trying to accelerate.  I replaced the sparks plugs and fuel pump.  The fuel filter was replaced about a month before the pump.  Please help determine what's wrong.

Answer
Check the distributor for oil under the cover that is under the rotor.  You will have to take the phillips screw out of the center of the shaft that the rotor attaches to and the two screws that hold the cover on.  If there is oil in the pickup area the seal is blown and you will need to get a revuilt distributor.