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    #1

    FPR and no start

    So my car let me down this morning. Started up cold I let it idle for a minute went to back out of my parking stall and puh. It died wouldn't start again no matter what I did.

    I have fuel and spark. It turns over fine. But when I pulled a plug it was wet, so the engine is flooding itself I believe.

    The fuel pressure measured at the inlet of the rail was ~48psi.

    The fuel pressure doesn't change if I disconnect the vaccum line to the FPR while cranking is that normal or does it indicate that the FPR is faulty?

    Bentley doesn't mention what the FPR should do when cranking, just that at idle it should drop the pressure to 43psi from 46psi at higher revs.

    I have been having intermitant hot starting problems since I got the car a year ago, and it has been cutting out just barely when cold ie. it suddenly drops 200rpm CEL flashes then keeps going like nothing happened. I don't know if this is connected.

    When I went to check it this afternoon it caught for a half a second like it wanted to start but didn't.

    Thoughts?

    '89 Alpine S52 with goodies
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    #2
    Just thowing it out there, but is CPS in good shape?
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      #3
      I am getting spark doesn't that indicate the CPS is good?

      EDIT: Cps resistance= 515 ohms so it's okay.
      Last edited by Adrian_Visser; 03-24-2010, 07:56 PM.

      '89 Alpine S52 with goodies

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        #4
        Nobody?

        '89 Alpine S52 with goodies

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          #5
          Did it spit and sputter or just die as if you shut the key off?

          "See, we're adding a little something to this month's sales contest. As you all know, first prize is a Cadillac Eldorado. Anyone wanna see second prize? Second prize is a set of steak knives. Third prize is you're fired."

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            #6
            sounds like a bad fpr to me. when you unplug the vac line from it it should spike the fp... is there fuel in the vacume line coming from the fpr?

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              #7
              FUCK!
              I tried a new FPR (yeah $100) same thing barely sputters no start. When I disconnect the electrical connector for the fuel rail (the one under the TB) it starts and runs until it runs out of gas in the fuel rail so it is definitely flooding itself.

              Only things I can think of are a short to ground in the harness to the DME or a bad DME.


              EDIT: it was the DME.

              Further testing at the connector under the TB showed that the DME was grounding the injectors whenever the key was in the run position. A borrowed DME solved the problem.
              Last edited by Adrian_Visser; 03-26-2010, 07:44 PM. Reason: update

              '89 Alpine S52 with goodies

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                #8
                Thats a funky one.
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                Parts Wanted
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                  #9
                  Yeah Weird eh.

                  '89 Alpine S52 with goodies

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                    #10
                    I'd have never figured that out.
                    sigpic 1987 325is

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