1992 300E mostly no start prob

[kbatson]

Where to start! Car broke down on highway (92 300E 3.0L). Checked for spark and fuel- Had a weak spark (found distributor cap button had worn out and was missing). Replaced the dist. cap and the car started for two minutes then died and would not restart. Checked fuel pressure- 80 psi with normal pressure drop. Vacuum reading when cranking was 3 to 4 inches. No visable vacuum leaks. Tested EHA valve connector 12V with key on 10.25V when cranking (seems to have cis brain awake and alive). NO fuel leak at valve. Fuel distributor plunger moves freely and no fuel has leaked out underneath. Removed egr valve thinking cat. convertor was clogged- made no difference still would not start. Sprayed ether into throttle housing- there was not so much as a hickup at all. Engine cranks normal and has good compression on all six cylinders. I tryed replacing the temp sensor and over protection relay which did nothing. Can hear both fuel pumps running!!! The car has had good spark the entire time after replacing the dist. cap. I am totally out of Ideas!! Would the MAS or CIS brain cause this problem??? HELP!!!