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Fuel Distributor Help Needed!!! 200 1985

posted by  swarner on  Mon Apr 4 06:07 CST 2005
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i have been trying to get my 85 244 turbo running, and have tracked the problem down to one area. the fuel disributor is getting gas, but not passing it on to the injectors. i am almost sure that the car will run if i can remedy this problem. if i crank the motor and/or give it gas while trying to start it, pressure builds up and then if i crack any of the fuel line bolts, gas sprays out. i checked with the auto parts stores in town, and they priced the fuel distributor at $500-$3000! that is far more than the car is currently worth.

does anyone know if (1) the fuel distributor can be opened up and cleaned or reconditioned if needed, or (2) if the best route would be to get a used part from a yard, or (3) if the real problem lies elsewhere and is just causing this trouble at the fuel distributor?

i took the air-fuel unit out and removed the fuel distributor and physically blew air through with my mouth and it seems to have open passages. this isn't the technical way to do things, but it was all i could think of.

i really need some advice on this, so if anyone could respond, i would appreciate it. a phone call would be great so that i could explain things better. if you call, i'll call you back on my bill. 435-327-1911.

thanks!








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    Fuel Distributor Help Needed!!! 200 1985

    uid 18083's pic
    posted by  lucid on  Mon Apr 4 09:23 CST 2005
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    last visit: Fri Oct 24 12:31 CST 2014
    [RELATED]

    Since the car sat for a long time (previous post), I would do a quick check to see if the airflow plate is free to move (engine off).

    If it is free, run the pumps (jumper fuses 7 and 4 -- Left side contacts best).

    Then see if you can depress the airflow plate with moderate pressure. It must deflect a little (as with cranking airflow) before the FD will meter fuel to the injectors.

    If it feels like it's locked, it could be excessive Control Pressure on the control plunger, due to a blocked fuel return at the CPR/WUR.

    But with any Kjet, a fuel pressure test as Chris suggests is probably the very best 1st step, so you know your basic Control and System pressures are correct at "square one".
    --
    Bruce Young
    '93 940-NA (current) — 240s (one V8) — 140s — 122s — since '63.








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    Fuel Distributor Help Needed!!! 200 1985

    posted by  c_j_mooney on  Mon Apr 4 08:46 CST 2005
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    last visit: Wed Sep 14 17:39 CST 2011
    [RELATED]

    The fuel distributor is generally pretty bombproof. The control pressure regulator may have failed but first I'd suspect the fuel pump - if there's not enough pressure from that pump to open the injectors nothing's going to happen.
    -Chris








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      Fuel Distributor Help Needed!!! 200 1985

      posted by  swarner on  Tue Apr 5 05:21 CST 2005
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      guys, thanks for the help. after reading your messages and then re-reading the manual, i think the best step for me at this point would be to test the line pressure and see if the pump is sending enough to open things up. i know it pumps, but maybe not enough.

      has anyone ever done a line pressure test? if so, is there a special gauge or do i fabricate one, or what's the best route?

      thanks








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        Fuel Distributor Help Needed!!! 200 1985

        uid 18083's pic
        posted by  lucid on  Tue Apr 5 07:58 CST 2005
        Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
        last visit: Fri Oct 24 12:31 CST 2014
        [RELATED]

        has anyone ever done a line pressure test? if so, is there a special gauge or do i fabricate one, or what's the best route?

        Yes, there is a special gauge set up for Kjet(sometimes called "CIS" in catalogs). It's a 100 psi gauge, hose connected the middle of a "tee", with a shut-off valve in one leg of the tee.

        I won't go into the attachement here, since you don't have one yet. And I don't see it in the latest JC Whitney, but they had it a few months ago for about $60. I'd suggest you put up a new post for possible sources.

        It measures both Line/System and Control pressure, according to whether the shut-off valve is closed or open. Both pressures are well worth knowing when diagnosing Kjet operation.

        Did you check the airflow plate? If it doesn't move, you can have 90psi from the pump, but nothing from the injectors.
        Also check out the short Kjet movie link that Art posted at the top. I think it shows that the airflow plate has to move before the injectors "sing".
        --
        Bruce Young
        '93 940-NA (current) — 240s (one V8) — 140s — 122s — since '63.







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