Volvo RWD 900 Forum

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And the good times just keep coming, 960 Update...again 900

posted by  shaner on  Sat Aug 28 10:59 CST 2004
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well the pump is in, let that be the last i ever speak of that project ever again.

okay so here's the situation. there is fuel pressure at the fuel rail and FPR. At the initial first few cranks while starting it will sputter and every once in a while as a tease seem just about to take off, but it still seems like there isnt enough fuel being let go by the injectors to develop and maintain running.

there is spark, there is fuel at the rail. BUT for reasons beyond my American brain the injectors it seems arent opening enough. the OBD reading for the fuel injection system comes back 1-1-1 hmmm? no i'am not able to get a reading off position #6 as i'am not too sure on how to read off the ones without a connector in them.

just a re-cap on how i've gotten to this point.
going to a friends house one night stop to get something to eat with the car running just fine no problems at all, come out and starts up VERY rough fearing something was definitley up i turn it off....same as is now....just spins and sputters a bit.
wonderfully engineered Swedish/Deutsch parts that are new.
- Camshaft Position sensor.
-Fuel pressure regulator replaced a few months ago.
- Fuel filter/spark plugs replaced at Christmas
- A truly pleasureable In-tank Fuel pump.








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    And the good times just keep coming, 960 Update...again 900

    posted by  DanR on  Sun Aug 29 13:10 CST 2004
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    last visit: Thu Oct 23 15:25 CST 2014
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    Just some of my thoughts, there will be input from others that should help you out.

    What kind of spark plugs did you put in? Try pulling them out and checking the gap. This car is very critical to the type of spark plugs and the correct gap.
    I would look into that. I have found that the NGK's work the best, just the simple copper cheapies.

    Without using a pressure guage you really have no idea if the injectors are getting the fuel. So get your hands on a guage, the big chain auto stores will lend them for free.

    I don't think it is the coils, to have more than one fail at the same time seems pretty impossible. Besides I would bet that the engine would run on 3 cylinders.

    Do you have a volt/ohm meter? Test the injectors for resistance, should be approx. 16 ohms, while cranking have someone read the voltage to the injectors, should be battery voltage.

    If all else fails, a compression test and a leakdown test might give some clues.

    DanR 94 964 259,000 miles (25,000 on the new engine)
    --
    DanR








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      And the good times just keep coming, 960 Update...again 900

      posted by  shaner on  Sun Aug 29 15:37 CST 2004
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      yeah i have acess to a volt/ohm meter, to check the resistance i'd just take those wire harness off under the fuel rail correct? if that comes back odd what would be the next thing to look at (ECU? Harness?)

      hmmm now i just had a valve job in febuary (stuck valve finally got bent) and the first time it cranks over it will begin to start for a few seconds, just seems like its not continuing to get fuel.








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        Another thought 900

        posted by  DanR on  Mon Aug 30 03:23 CST 2004
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        last visit: Thu Oct 23 15:25 CST 2014
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        With the ignition off, disconnect the AMM, air mass meter, and try starting.
        Maybe it is fried, but should start up with it disconnected, it may take a couple of tries though.

        I do not have my green volvo fault tracing manual with me, so I will get back to you on what to check for next.

        Did you ever replace the fuel pressure valve?


        DanR 94 964 259,000 miles (25,000 on the new engine)
        --
        DanR








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          Another thought 900

          posted by  someone claiming to be shaner on  Mon Aug 30 08:12 CST 2004 [RELATED]

          yeah the fuel pressure regulator I replaced around Christmas.

          hey I hadnt thought of the AMM and putting it on limp home mode hmmmmmm there's a idea

          wow fault tracing manaul how cool is that?







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