Need Some Real Help
 

I Have A 97 C280 That Wont Stay Running. It Will Fire Up But Then Cut Right Off. Now If You Dump Fuel Thru The Throttle Body Tll Stay Running. Or If You Unhook The Vacuum Hose Off The Regulator And Put It In Fuel Itll Run. Now Ive Changed The Fuel Filter, Check The Pump And It Is Pumping And Im Stumped And Any Help Please. I Also Had The Ignition Tumbler Changed And Ordered A New Key From Mercedes. Then A Week Later It Started This

I presume you have no way of testing anything. You need to know whether you have drive authorization, injector pulse, proper fuel pressure, and spark.

If you had tooling I could help you use it, it would probably be wiser to help you find a tech capable of doing such.

I Have Injector Pulse. I Need To Know What Pressure I Need To Have And Ill Test It. See I Took It To A The Shop That Did The Ignition Switch And They Just Put It In The Back And Let It Sit Up There For Over A Year Even With Me Bugging Them So I Went And Got It And I Fiqered Ill Look At It My Self. I Tested The Pump, I Got It Fired Up And Pusehed The Vavle On The Fuel Rail And Fuel Squirted Out But I Dont Know What Pressure I Need And Ill Put A Gauge On It
Thank You For Your Help