Mercedes Benz repair: mercedes benz 450 sel, jetronic fuel injection, fuel injection system

Question
you have been talking with my father about the
fuel injection problem with my benz,the injectors are firing all the time with the key on that is why fuel pressure is 30 psi when running,there is power and ground at all times
with key on,need to  know what triggers injector groundsi.e. cam sensor,distbor est.
car ran fine and then just running like shit,
i checked for grounded out wires ext. but didn't see any,i noticed a DLC connector mounted by
p/s res. can i get troble codes from this maybe
any help before i bite the bullet and buy a repair manual from benz

THANKS
BILL COREY

Answer
My best advice:
Odds are you have a ground problem.

I have no access to my regular data.

You have the "D-Jetronic Fuel Injection" system on that car.

Here are some links that have diagnostic procedures for it, do not be shocked that the exact same system was on other brands of cars.

http://www.icbm.org/erkson/ttt/engine/fuel_injection/d-jet.html

http://www.vclassics.com/archive/efi.htm

http://www.swedishbricks.net/faq/fidjet.html

http://members.rennlist.com/pbanders/djetfund.htm

http://www.914fan.net/djet.html