420 sel
 

I made bad worse. First I had intermitten problems. No fuel when restarting. Replaced gas cap,fuel filter,tank to pumps fuel lines. Seemed to work, then the classic jammed key. I disregarded nice detailed instructions from this web sight. A friend said, lets just yank the tumbler. We did and like an old chevy put in a screwdriver and she turned over. O.K. but I guess mb has a fuel cut out so now no power to pumps. Any ideas ? I know, do it right. Besides that?

Answer:
 

This car does not have a disabler security system = your issue needs further diagnosis.

Here is the thread you need to study + the titles to review for correct diagnosis. :)

Fuel Injection
http://www.peachparts.com/shopforum/showthread.php?t=142406


Mercedes-Benz Driveability
Evaluating Electronic Engine Controls
by Steve Brotherton, Import Specialist
Published in: ImportCar∞, February 2001

Testing OVP

Help!! Need OVP plug schematic! "Over Voltage Protection relay"

Bizzarro OVP problem solved! "Over Voltage Protection relay"

This Volvo club page has a good overview of K-Jetronic Fuel Injection

Bosch D-Jetronic electronic fuel injection system

D-Jetronic History and Fundamentals

Jetronic

Bosch Fuel Injection and Engine Management

Bosch D Jetronic and K Jetronic Troubleshooting




Have a great day.

Thanks Hunter,lots of good info. It will be at least a week before I can check.....OVP,FUEL PRESSURE REGULATOR,FUEL PUMP RELAY,AFM PLATE, EHA AND THEN WE CAN GET BACK TO CRUISIN.
THANKS AGAIN,
Ed