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  #1  
Old 01-26-2007, 03:20 PM
shammy
 
Join Date: Jan 2007
Location: Rincon, Georgia
Posts: 7
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MY 1991 190E 2.6 HAS GOT ME AT A LOSS. A COUPLE OF WEEKS AGO IT STOPS RUNNING. AFTER GETTING SOME ADVICE FROM ANOTHER FORUM MEMBER AND RUNNING A FEW SIMPLE TESTS WE FIGURE OUT THAT MY MAS CONTROL UNIT IS BAD(FUEL PUMP RELAY). I PURCHASE A UNIT AND INSTALL IT AND... STILL WILL NOT START. COULD ANYONE SHED A LITTLE LIGHT AS TO THE NEXT STEP I SHOULD TAKE? ALSO IS THERE ANY WAY TO TEST THE NEW UNIT(MAS CONTROL UNIT) TO SEE IF IT IS BAD? THANKS IN ADVANCE.

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  #2  
Old 01-27-2007, 01:26 PM
G-Benz's Avatar
Razorback Soccer Dad
 
Join Date: Apr 2001
Location: Dallas/Fort-Worth
Posts: 5,711
You mentioned MAS and the fuel pump relay in parentheses...unless I'm absolutely incorrect or you have a pretty exotic MAS unit, the fuel pump relay is a separate component having nothing to do with the MAS.

The MAS may affect performance and possibly set off a CE light, but wouldn't contribute to the no-start issue.
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  #3  
Old 01-28-2007, 07:30 AM
shammy
 
Join Date: Jan 2007
Location: Rincon, Georgia
Posts: 7
The Mas Control Unit (89-93models) Incorperates The Fuel Pump Relay Or So I Have Been Told. I Think My Fuel Pump Is Ok . I Can Here The Pump Ingage When I Turn The Key On. But That May Just Be It Priming The System And Then The Mas Control Unit Takes Over , I Don"t Know. I Have Not Been Able To Crank The Car Up In A Month Or So With The Exception Of Three Timmes. Twice When I Was Trying To Figure Out What Might Be Wrong And It Just Turned Over And Once When I Jumped The Fuel Pump Relay With A Piece Of Wire Between The Fuel Pump Relay Plugs. All Three Times It Went Back To Not Starting Again.

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