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1997 Chevrolet Suburban 1500 Question: 1997 suburban, k1500, 5.7l. engine has ALWAYS ran great! 2 weeks ago, running

 

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smt138, Potwin, KS, February 25, 2014, 14:13
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ruff. Service engine soon light flashing. Ran computer scan, results show code #PO302 and PO157. Replaced plugs and wires. Little better but still ruff and same codes coming up.160,000 miles. Help!!

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  • Answer #1

    G. T. Service Center (4188 Answers) , Stephenville, TX - (254) 638-3236
    ProfessorG February 25, 2014, 15:49
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     Master

    Do an injector test, sounds like it's time, and pressure regulator while you're there. Just finished a '97, customer changed wires, plugs, cap. Injector test showed #7 injector not working. Just a thought, let us know.

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  • Answer #2

    pushrod February 25, 2014, 18:51
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     Master

    This is a misfire on the front cylinder, passenger side. Possible distributor problem,, check spark on that cylinder. Dont worry about any other problems except getting the #2 cylinder working again!! That will most likely take care of that 02 sensor code as well. May need a NEW distributor plus cap and rotor!!

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