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1999 Isuzu Rodeo Question: confused / check engine

 

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circlenut, 3.2L V6, Phoenix, AZ, April 26, 2011, 07:43
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1999 V6 4X4 rodeo with 150,000 miles , never had any trouble until now , low fuel pressure ( lean ) O2 sensors . had fuel pump replaced , Twice ( 35 lbs pressure at idle . O2 sensors replaced . still shows , lean , O2 sensor ( check engine still on ) $1200.00 later . any suggestions on how to fix ?
at idle the regulated fuel pressur is 35 , pull the vacume line off the regulator and the pressure increases to 48 - 52 . and the shop I had do the work , pulled the codes , I don't think they have the full diagnostic equip . / they pulled a code of lean / low fuel pressure , changed the pump , same code , changed it again , then O2 sensors , looked for vacume leaks . and give it back , and are stumped

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  • Answer #1

    April 26, 2011, 07:46
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     Master

    171,174 codes could be vacuum leaks, mass air flow reading incorrectly, pcv vale or low fuel pressure.
    did you have a real diag or just a code pull with a guess??
    i would have a shop ok at it to confirm. as far as the low pressure, did you have the regulator checked??

    Thanks for using repairpal.

    Roy

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    Visitor, April 26, 2011, 07:56

    at

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    mastertech6371, April 26, 2011, 08:18
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     Master

    you need a new shop.
    there is no code for low fuel pressure.
    o2 sensors were not the problem at all. i think they missed the boat with this issue.
    use the driectory tab at the top to find a shop in your area. you need this checked properly with a shop that will diag it properly and give you an accurate bid for repairs that will fix your car.

    Roy

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