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1999 Isuzu Trooper

Question: how do you adjust timing

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ksab, 3.5L V6, Brownsville, PA, January 23, 2012, 06:17
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car idles fast and have tried everything ,was showing codes of P0300,P0174

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    Greg's Orange Auto (4512 Answers) , Orange, CA - (714) 769-6971
    globalhelper January 23, 2012, 06:34
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    LOOKS LIKE CODE PO300 IS MISFIRE CODE ( RANDOM) AND PO174 IS LEAN BANK 2 LOOK FOR A VAC. LEAK CAUSING IDLE TO STAY HIGH AND POSSIBLY CAUSING MISRFIRE ALSO

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    ksab, January 24, 2012, 10:56
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    Ok Thanks , found the vaccum leak that fixed the P0174 ,but i still have the P0300 still coming up. Replaced the plugs and found two bad coil packs, but random misfire still coming up

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