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contaminated fuel

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  • 07-12-2007 3:47pm
    #1
    cantdecide
    Registered Users Posts: 11,465 ✭✭✭✭


    My brother let his Legacy run out of petrol and after filling up, it's spluttering and won't rev higher than 2,500.

    Any idea what has been affected by this or is it likely the filters only are clogged.


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    #2
    crosstownk
    Registered Users Posts: 12,863 ✭✭✭✭crosstownk


    cantdecide wrote: »
    is it likely the filters only are clogged.

    I'd say this is the best place to start. Start from the tank and work your way towards the engine.
    Untitled Image




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    #3
    cashmni1
    Closed Accounts Posts: 629 ✭✭✭cashmni1


    If it won't rev past 2500 rpm, make sure it isn't in "limp home mode". I presume there is no warning lights on?
    It happened me, but with a diesel car. Went in to a safe mode but it didn't have the spluttering. That sounds like the engine isn't getting the correct fuel/air mix.


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    #4
    ciarsd
    Registered Users Posts: 2,326 ✭✭✭ciarsd


    Filter, pump, injectors.


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    #5
    Mr.Diagnostic
    Registered Users Posts: 937 ✭✭✭Mr.Diagnostic


    Contaminated fuel is extremely rare, I have not seen a case of it for many years.

    If the problem was caused by debris because of the low fuel level in the tank then he will need to sort the tank out too. Best bet is to check the fuel delivery pressure and volume before anything else.


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    #6
    cantdecide
    Registered Users Posts: 11,465 ✭✭✭✭cantdecide


    Thanks folks. I got contaminated petrol in 2003 (so yes, many years I suppose).

    How does one check fuel delivery pressure and volume?

    Ps, how many filters will his car have??


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    #7
    Mr.Diagnostic
    Registered Users Posts: 937 ✭✭✭Mr.Diagnostic


    Fuel pressure is measured on a fuel pressure gauge connected to the high side, ie between the pump and the the pressure reg. Volume is the amount the pump can deliver in a given time, ie X litres per minute.


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    #8
    cantdecide
    Registered Users Posts: 11,465 ✭✭✭✭cantdecide


    Will the same instrument do volume and pressure? Is this something all garages will have?


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    #9
    Mr.Diagnostic
    Registered Users Posts: 937 ✭✭✭Mr.Diagnostic


    cantdecide wrote: »
    Will the same instrument do volume and pressure? Is this something all garages will have?


    Some do both, some only pressure. Volume can be measured simply by running the pump with the fuel line into a suitable container for a measured time.
    I think every garage should have at least a fuel pressure gauge but some dont.


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    #10
    cantdecide
    Registered Users Posts: 11,465 ✭✭✭✭cantdecide


    Legacys only have one filter in the engine bay. Access was great and we blew the old line through. Tons of gunge in the filter but now she's running 100%.


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