Question about 2003 Buick Rendezvous
Code po303 refers to cylinder misfire no 3 cylinder.===causes engine mechanical fault--wiring--ignition /fuel systems --injector--ECT/MAF sensor--ECM
if it has a tapping noise I would check for a mechanical problem with the rockers and followers.
Posted on Mar 19, 2014
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Posted on Jan 02, 2017
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