Quote:
Originally Posted by Frank Reiner
Re:
Need Fuel system help 1991 300SD, Bosch CSI
You are talking about a 300SE, are you not.
There may be a crime scene here, but the Bosch system is CIS. Not CSI.
You have the Accumulator and FPR identification correct.
The FPR however, is downstream of the FD, in the return circuit.
As a check for fuel flow in the FD,
1) Loosen the six fuel injector line fittings in the top of the FD.
2) Bridge the fuel pump pins in the pump relay socket so that the pump will run continuously.
3) Push down on the air meter plate. Does fuel flow out of the loosened fittings?
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Yes--you saw the typos--It is indeed a 300SE with continuous injection.
You say the FPR is DOWNSTREAM of the FD??? wow THAT may be the issue. Fuel line from the pump ( on this car) went to the fuel cooler and then to the FPR, then to the port on the forward side of the FD. The fuel return line is connected to the port on the rear side of the FD. Are you saying that the lines are reversed???
If only it would be that simple.... ( You just never know what a "basket case" might be).