Question about 2004 Isuzu Rodeo

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Intermittant check engine light

2004 3lt diesel auto holden Rodeo , drive anywhere between 80 to 120 klm and the check engine light comes on ,,flick into neutral and let revs die down , check engine light goes off ,back into drive and continue to drive normaly , check engine light then may or may not come on , very intermittant , Question is what is the cause and what is the cure?

Posted by on

  • axeldeininge May 28, 2009

    Have had scan done , resulting code ONLY states that problem is /maybe electrical or fuel , nothing more ,, have replaced all fuel filters , checked all fuses and wireing connections , what else can be done ?

  • axeldeininge May 29, 2009

    Not complaining at all , stating a fact , the obd code ONLY came under fuel /electrical , so where to begin , as stated in original query the problem is intermitant but when it does happen it always starts after travelling 80 to 120 klm ,, trip two weeks ago of 1100klm light came on every time at 100/120 klm after refueling then intermitant until 200/230klm then no problem until refuel and cycle starts again ,,

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  • Isuzu Master
  • 19,396 Answers

The only way to find out what the problem is is by doing a scan of the car computer module using an OBD code reader.
The codes returned will tell you the cause of the problem.

Posted on May 28, 2009

  • Ginko
    Ginko May 28, 2009

    there is no code stating that problem is /maybe electrical or fuel. OBD codes are related to determined conditions.

    For example if code is misfire you start unplugging spark plugs wires
    to find misfire, then check distribution etc.

    If you want free help you should provide information rather than complaining.

    I hope this help.

    Regards.




  • Ginko
    Ginko May 29, 2009

    Fuel electrical can concern wiring , relays, Injectors and fuel pump.

    A good thing to do would be reading injectors and fuel pump waveform, this must be done at a garage.
    A basic test can be done checking fuel pressure and compression at high rpm and warm engine. This can be done with hand tools that can be purchased for a small fee:

    KD Tools Fuel Pump Vacuum & Pressure Tester .

    Westward 1MZU3 Compression Tester

    There are many different Fuel/electrical obd codes, and all them tell you more than just fuel /electrical.
    You should tell me the code.

    I can see the rating is still negative. We give away our time for free to answer your questions. Sorry that this did not help.

    Thanks for your interest in Fixya.

    Goodbye.


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