Big Problem. Tiny Budget.

[CONRAD]

I HAVE AN 1993 MB, 2.3, 190E. 5 SP.
HAVING A FUEL PROBLEM, I THINK.
CAR IS EAGER TO START, BUT WON'T IDLE/RUN.
HOW TO TEST IF FUEL PUMP RELAY IS WORKING PROPERLY?
HAVE REPLACED THE: PLUG. WIRES. CAP/ROTOR. FUEL
FILTER. SEVERAL BREATHER HOSES NEAR/UNDER THE AIR
FILTER HOUSING. FUEL DIST. FUEL PUMPS (2). NEW CAT.
NEW MUFFLERS (2). AIR DUCT HOUSING.
LABOR HERE IN THE SF, BAY AREA IS $130/HR. BIG BUCKS
FOR A TINY BUDGET. WHAT'S LEFT TO CHECK ?
I HATE 'REPAIRS-BY-ERRORS............'

TKS IN ADVANCE.