help diagnosing my problem

[russelljones48]

background: our '67 230Sl went to a local "show" last night and on the way home (only 4 miles) it stalled a couple times at stop lights and stumbled during part throttle acceleration.  It seemed to run well at full throttle.  I've had some of this type of behavior very sporadically before but nothing this severe and it always went away quickly - maybe 2 times in the last 6 months.  I also have what I'd call hard shifting - the car is an automatic.   


I've read the tech and Joe's great post here, but before I dive in I'd like others comments and suggestions on how to diagnose this problem.  In my experience this could be either a fuel delivery problem or an ignition problem so I may want to perform some other diagnostics - especially since I'm a novice when it comes to the Bosch FI system.


rj
 

[Bonnyboy]

Sounds electrical to me.  Check your distributor to make sure everything is tightened up like it should be / wires are all tight. Auto advance/retard especially. Check the archives for electrical issues - a failing coil could also do that.

[badali]

Check the points.  I had this problem and the points were not at the correct gap.  I start at 16 thousandths an adjust from there.

[wayne R]

Agree    with Brad and Ian-----electrical check,---points and condensor.

[ja17]

Ditto, yes check the point gap.

[russelljones48]

thank you all..  and it did turn out to be electrical but nothing subtle.  apparently the last person to work on the distributor left the cap clips loose but re-installed the cover so I didn't see the problem on first inspection.  the rotor had pretty much self destructed.  gave me an opportunity to do some deferred maintenance.  new (and slightly hotter) plugs, plug wires, cap, rotor, and coil.  it's running like a top again.   

rj