Question about 2007 Volvo S60 T5 Sedan

4 Answers

Engine will not start

I have checked spark and do have that. Checked pump by disconnecting fual line after the fuel filter and it pulses but does not stay on? Does not seem to have pressure at the check valve. Got it started once by switching the fuel relay with the wiper relay. Might have been a fluk!
Any suggestions or checks?

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  • nostart May 29, 2008

    You know that is what I thought but when i made the switch both area's of the car seemed to work. Now the wipers still work but the car still does not start. I know I my chysler one time i had a problem with starting and it had a safty relay that shut of the gas. Do you know if this car does?

  • nostart May 29, 2008

    I have very little pressure at the rail. The car is also not sending any codes. Just will not start. I am trying to avoid expensive repair. I am trying to sell it.

  • nostart May 29, 2008

    Thanks! That makes sense. I will try the check in the morning and let you know if it works.

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4 Answers

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  • Master
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Hi,

All gasoline fed engines would require only two (2) crucial elements to run: 1) ignition system and fuel system. Since you have determined that there is spark then that would be the least likely (but still could not be discounted) fault why the car would not start. That leaves the fuel system. The fuel system could then be sub-divided into five (5) major components: a) storage; b) fuel line; c) filtration/check; d) pump; and e) delivery (carburated or injected).

By process of elimination, you have determined that there is fuel and that the engine started/run when the fuel pump relay was temporarily replaced with the wiper relay. Hence it could be the fuel pump relay (most likely). To validate your initial finding(s) (relay), you could try a temporary hard wiring of the fuel pump straight to the B+12 of the battery and try starting the engine.

Incidentally, to my understanding your car has a "limp home mode" so even if it were a software or ignition problem, the car will still start. Additionally, it would seem that this problem has persisted for some years. There was even a recall sometime in 2001 due to fuel related issues.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Posted on May 29, 2008

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  • Louie  Role
    Louie Role May 29, 2008

    I should have added, it is the computer box that triggers the relays which in turn powers on the fuel pump. The correct procedure would be to use an appropriate diagnostic software attached to a compatible OBD2.

    Alternately, you can try simple voltage checks (using a DVM) to verify the presence of +12 on fuel pump, relays and even the output of the computer box.


  • Louie  Role
    Louie Role May 29, 2008

    You might find this link interesting, detailing a problem with a fuel tank showing "1/4-2/3" contents but is actually empty.

  • Louie  Role
    Louie Role May 29, 2008

    Hi again nostart,

    Understand and will treat your concern with the end view of a DIY. The fuel flow would have to be visually observed starting from the tank. With the switch to ON/IGN but not CRANK/START, determine if the fuel pump motor is running. There would be discernible humming/vibration if it is. Switch OFF, with extreme care and precautions, you need next to determine if fuel is coming out of the fuel tank. You need to remove the rubber hose, clamps and connection (if any) and feed the disconnected fuel line from the tank to an appropriate container. Switch to ON/IGN for a minute or so. You would then be able to check if fuel is coming out of the tank through the internal pump (if there) through the fuel line connector to the external container. You could likewise check if there is pressure. If none or fuel is just dribbling out, then it is a tank/pump/filer (and possibly a valve similar to your Chrysler) concern. If yes then the problem is further down the line towards the engine. Reconnect and look for the next junction (metal tubing to rubber hose), do the same. This would enable you to check for line blockage. Proceed to the next junction and repeat the process.

    All of the electrical devices/components in your vehicle uses 12V such as the relay, pump and valves. If you suspect a component, confirmation is a matter of hardwiring direct to the +12 terminal of the battery and see if it works.

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Hi, Is the ignition turning on with the battery power

Posted on May 29, 2008

  • Maanita Chadha
    Maanita Chadha May 29, 2008

    check the starter relay under the hood

  • Maanita Chadha
    Maanita Chadha May 29, 2008

    when the ignition switch is turned to start then the lead in the relay should gets energized.
    Do you have fuel presure in the fuel rail, check if the injectors are firing.
    try too lock and unlock the driver door to reset the alarm but it
    wont help. this can be caused by the alarm, or the computer
    has a problem itself.
    Best suggestion will be to take the car to the service center and get it rectified


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  • Master
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It could happen if you keep the gas levels low for a longer period of time.. There is water, dirt and sand found in the bottom of just about every fuel tank. This is some what normal to find, so allowing the electric fuel pump (which is located in the bottom of the fuel tank) to **** up this crud will only cause premature wear and tear to the pump itself. So check first for any deposits/sedimetation in or around the pump.

Check this first and let me know how it goes..

Posted on May 29, 2008

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  • Swilin Sampson
    Swilin Sampson May 29, 2008

    hmm..the **** should read s-u-c-k...

  • Swilin Sampson
    Swilin Sampson May 29, 2008

    If this happens only when the temperature is cold, it could be a
    leaking Fuel Pressure Regulator (FPR), or due to lost pressure in the
    fuel lines due to cold, in which case you may have to replace the
    fuel pump / fuel filter / clean injectors.

    The best way to diagnose this is to actually take it to a mechanic and have him check for you.



    Hope that helps! Should you have any further questions,
    please post them here.




    If you are satisfied with my solution or have no further queries, please take a
    moment to "Accept" this solution.



    Thank you for using Fixya!



    Cheers!

    IrishDruid

  • Swilin Sampson
    Swilin Sampson May 29, 2008

    I would think there is an issue with the onboard computer..

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Nope..sounds like your fuel pump needs some juice so to speak..if the wiper relay works, and the fuel pump relay doesn't, check the fuses first, of course..then it's the fuel pump relay, or the pump it self.

I'm assuming you have enough fuel, right?

Posted on May 29, 2008

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