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1997 GMC Yukon Question: whats causing the p0306 code

 

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yukon7, 5.7L V8, Placerville, CA, December 08, 2012, 18:03
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replaced rotor cap plugs wires o2sensors mass airflow sensor and still getting code p0306 and it has a distributor and a throttle body, so what now

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  • Answer #1

    pushrod December 09, 2012, 00:50
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    Did you clear the code after repair? If so check compression and for a vacuum leak on or near # 6 cyl. Third cyl on pass. side.

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  • Answer #2

    your.mechanic December 09, 2012, 17:38
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    check the coil

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    pushrod, December 09, 2012, 17:59
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    Only one coil for all cylinders. Should not set po306.

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