> I am very very new to this car, but after reading all these posts, I am
> really loving this car!!!

Why would reading posts make you love the car?

> My car smokes everytime I acceleratre, sometimes when idling, specially
> if I slam the peddle just before shifting, it smokes quite a bit, I can see
> it in my mirror!

Lots of causes. Check the archives. I'd start with a can or two of LubroMoly Diesel Purge. Then check chain stretch, IP timing, delivery valve seals, etc.

Actually, I'd start with a PPI even if in this case the first P stands for post.

> How can I check if the turbo is working or not???

If the car is enjoyable to drive, the turbo is working.

In my SDL, the onset of boost at around 2500 rpm is unmistakable.

> My a/c never shuts off, even if I press the O button real hard, it stops
> bu comes back on, and the center vents blow very little air, the windshield
> vents blow alot of air and make my windshield foggy!

Check the archives. I'd start with bad PBU. Might need resoldering, might need replacement.

> My RPM idles at 500, I never see the RPM go to high, I think its always
> below 2000.

You love a car that won't rev past 2000? Boy, you'll be nuts for DslBnz's (?) SDL that revs to 5300

500 is a little low. Pull the plug at the back side of the IP and see if the idle drops further or the engine stalls. If the engine stalls, the EDS is working. Try turning the knob near the left hood hinge to a different setting. Idle spec is something like 630 rpm. If the engine doesn't stall, the EDS isn't working. And you're car is proving once again that electronics failures will not strand an 86-87 SDL.

Sixto
95 S420
87 300SDL