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Type: Posts; User: bdeboyes@ec.rr.com

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    415

    Spark Knock Issue

    I need some input on a spark knock issue under light acceleration for my 2003 4.8, manual trans silverado. Went to 89 octane. Changed PCV, plugs, clean air filter. Will a bad knock sensor cause it...
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    2,008

    4.8 to a 5.3 swap.

    2003 silverado w/4.8 and a manual 5 spd. 2wd. I'm installing a rebuilt 5.3 w/ a size above stock Howards cam. Will I need to tune my computer or will it be good since they are already set for a...
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