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Fuel Pressure Regulator Leak - 91' 318i M42

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    #1

    Fuel Pressure Regulator Leak - 91' 318i M42

    So i recently refreshed some of the fuel system, I replaced the stock injectors with some mustang ones and the o-rings on the FPR with some generic ones and the short fuel lines going to the rail. I hadto bend the flange a little bit on the fuel rail to pry off the FPR.

    When I got the car idling, it had a pretty bad misfire and fuel was leaking from the FPR. I was wondering if anyone knew if it had to be in a specific orientation? Or does the o-rings on the FPR specific to it? The generic o-rings are a little thinner than the original ones. And the FPR I knew was working originally.

    Thanks for any help!
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    #2
    They need to be fuel safe o-rings. If they were slightly smaller, they won't seal properly either. Why did you have to bend the fuel rail? You shouldn't have to.

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      #3
      Originally posted by AndrewBird View Post
      They need to be fuel safe o-rings. If they were slightly smaller, they won't seal properly either. Why did you have to bend the fuel rail? You shouldn't have to.
      The regulator was pretty stuck in the rail. I tried bending the flange back as best as I could

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