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I have a 94 Dakota 3.9 and am pretty sure I have a bad fuel check valve. I just had a new fuel pump installed about four months ago so am not going to have the pump pulled again. I plan to install an inline check valve. Now I'm puzzled about the fuel lines. I have a service manual that states all models use a return system, then it says a separate return line is no longer used. How can fuel be returned without a separate return line? It can't go backward while it's going forward.
 

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I have a 94 Dakota 3.9 and am pretty sure I have a bad fuel check valve. I just had a new fuel pump installed about four months ago so am not going to have the pump pulled again. I plan to install an inline check valve. Now I'm puzzled about the fuel lines. I have a service manual that states all models use a return system, then it says a separate return line is no longer used. How can fuel be returned without a separate return line? It can't go backward while it's going forward.
Because you're looking at a Chilton's or Haynes, not the factory service manual.

For 1994, the Dakotas swapped to a "returnless" design; the regulator is in the fuel pump assembly, not at the motor.

The fuel check valve is also in the fuel pump assembly, so ...

RwP
 
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