When you pulled the OVP, you shut off power to all of the engine management functions and everything went to default. You are relying on good old physics to keep running. You obviously have a malfunction somewhere with the engine controls.

If by the "fuel computer" you mean the CIS control unit, it's in the passenger footwell under the rug.

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Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe