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Old 03-22-2001, 04:45 AM
Dave Beaumont
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Can anyone tell me why 2 fuel pumps, will it still run ok with just one and the other bypassed?
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Old 03-22-2001, 12:31 PM
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
MB used either 1 large pump or 2 smaller pumps on cars from 1986 - 1993 with CIS fuel systems. 1 small pump doesn't have the needed volume to run car at higher RPM's. With 2 pump system their is less AMP draw & higher out-put than the 1 larger pump. The car should run IF the hoses are removed from the BAD pump. System pressure is around 90psi.
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