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failing fuel pessure regulator ? 200 1992

posted by  riverbend on  Thu Sep 12 16:07 CST 2019
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last visit: Wed Oct 22 15:29 CST 2014
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My '92 245 is hard to start. It cranks fine and kind of tries but won't run unless I open the throttle about half way. After that it runs fine. Starting is still a little off but when it is warm it starts without any help.

I have a fuel pressure gauge with an adapter for the schrader valve that Volvo thoughtfully installed in the fuel line. Unfortunately they put it under the fuel rail just about exactly in line with an intake manifold stud. I can not bend the line from the gauge short enough to get it on the fitting.

The vacuum line is not wet but does smell a little like fuel. I'm pretty sure I need a new FPR. The part is ~$175 so I'm reluctant to do a lot of trouble shooting by parts replacement. Twisting the rail looks like it will certainly snap off the front injectors. Any ideas on how to get the gauge connected ?

Thanks

Greg







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    failing fuel pessure regulator ? 200 1992

    posted by  Burco on  Fri Sep 13 15:44 CST 2019
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    last visit: Wed Feb 21 13:42 CST 2007
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    I bought the Harbor freights 20 dollar test kit. The gauge was bad out of the box, but the flexible hose fits, and I connected the other end to the hose on my HVAC gauges. Worked great.
    Dont know where else you can find a hose with the smaller screw on fitting.








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    failing fuel pessure regulator ? 200 1992

    uid 27's pic
    posted by  Art Benstein on  Fri Sep 13 03:42 CST 2019
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    last visit: Fri Oct 17 20:10 CST 2014
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    "Unfortunately they put it under the fuel rail just about exactly in line with an intake manifold stud."

    Hi Greg,

    This is indeed a frustrating placement. I'm sure safety was somehow involved in the decision.

    If you search for schrader adapters you'll find right angle fittings for truckers. I've never needed one, because I already have made an adapter to fit the rail to hose fitting one requires before the 1992 rail got the test port.

    Here's a post by someone who actually did get one: https://www.brickboard.com/RWD/volvo/1590312/940/960/980/V90/S90/adapter_fuel_rail_schrader_valve.html

    Wow, up to $175 now? Yikes. Used to be $40.

    Another thread about fuel pressure regulators:

    https://www.brickboard.com/RWD/volvo/1646708/220/240/260/280/excessive_fuel_consumption.html

    --
    Art Benstein near Baltimore

    "Doc, I can't stop singing 'The Green, Green Grass of Home.'" "That sounds like Tom Jones Syndrome." "Is it common?" Well, "It's Not Unusual."








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      failing fuel pessure regulator ? 200 1992

      posted by  joekidd on  Fri Sep 13 04:48 CST 2019
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      last visit: Fri Oct 24 10:54 CST 2014
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      My experience when the FPR fails is
      1 Poor mileage as the gas is getting sucked into the intake vacuum line.
      2 First start of the day takes awhile as the pressure is not being held up.
      3 If you smell fuel in the vacuum line its time to replace it.

      The Bosch replacements do not last as long as the original Bosch ones did which was about 15 yrs or so. I am on my 3rd one on my 88 and I think its starting to go as my first start of the day takes a bit longer than usual and its about 7 yrs old now.

      Purchased from FCP and its under warranty.








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        failing fuel pessure regulator ? 200 1992

        posted by  joekidd on  Fri Sep 13 05:08 CST 2019
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        last visit: Fri Oct 24 10:54 CST 2014
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        So true Art. If you have to hold your foot down on the gas pedal to start a FI car you know you've got a problem.








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          Flooding in FI cars 200 1992

          uid 27's pic
          posted by  Art Benstein on  Fri Sep 13 05:36 CST 2019
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          last visit: Fri Oct 17 20:10 CST 2014
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          Another common cause is a dribbling (leaky) injector or two.
          --
          Art Benstein near Baltimore

          Occam's Razor: That among competing hypotheses, the one with the fewest assumptions should be selected.








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        failing fuel pessure regulator ? 200 1992

        uid 27's pic
        posted by  Art Benstein on  Fri Sep 13 04:53 CST 2019
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        last visit: Fri Oct 17 20:10 CST 2014
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        "First start of the day takes awhile as the pressure is not being held up."

        It takes a while because the fuel leaking past the diaphragm has flooded the engine. Hold the throttle completely open to start.
        --
        Art Benstein near Baltimore

        I went to a seafood disco last week...and pulled a mussel.







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    failing fuel pessure regulator ? 200 1992

    posted by  Blindboy on  Thu Sep 12 18:32 CST 2019
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    last visit: Tue Oct 21 17:56 CST 2014
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    last FPR I got was $29https://www.ebay.com/itm/New-Fuel-Pressure-Regulator-Gas-VW-525-535-635-735-5-Series-6-325-3-Jetta-Passat/232513724090?fits=Year%3A1991%7CModel%3A240%7CSubmodel%3ASE%7CEngine+-+Liter_Display%3A2.3L%7CMake%3AVolvo%7CTrim%3ASE+Wagon+4-Door%7CEngine%3A2.3L+2316CC+l4+GAS+SOHC+Naturally+Aspirated&epid=7021314850&hash=item3622e5deba:g:Je8AAOSww8ldZHa9








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    failing fuel pessure regulator ? 200 1992

    posted by  Blindboy on  Thu Sep 12 18:31 CST 2019
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    last visit: Tue Oct 21 17:56 CST 2014
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    last FPR I got was $29https://www.ebay.com/itm/New-Fuel-Pressure-Regulator-Gas-VW-525-535-635-735-5-Series-6-325-3-Jetta-Passat/232513724090?fits=Year%3A1991%7CModel%3A240%7CSubmodel%3ASE%7CEngine+-+Liter_Display%3A2.3L%7CMake%3AVolvo%7CTrim%3ASE+Wagon+4-Door%7CEngine%3A2.3L+2316CC+l4+GAS+SOHC+Naturally+Aspirated&epid=7021314850&hash=item3622e5deba:g:Je8AAOSww8ldZHa9







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