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Spark Knock after Tune-up

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Old 10-31-2008, 01:27 PM
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Default Spark Knock after Tune-up
So I replaced the usual... plugs, wires, oil, fuel and air... I noticed today spark knock in the mid RPM range in 3rd. What causes this? I always thought this was from lugging the engine. Before the tune-up I noticed SOME spark knock, but it was only when i would floor it in 5th at around 1,000-1,500 RPM which i considered pretty low, so I understood why it was happening.
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Old 10-31-2008, 06:52 PM
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Possibly a dumb question: What grade of fuel are you using?


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Old 10-31-2008, 07:30 PM
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What plugs did you use? Autozone gave me the wrong plugs once and it pinged like hell until I figured it out.
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Old 10-31-2008, 09:10 PM
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93 Octane ALWAYS and I used NGK TR55 plugs.
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Old 10-31-2008, 09:24 PM
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Loose or not fully seated plug/wire connection is possible, also make sure the fuel filter connections are solid and not leaking.
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Old 11-01-2008, 10:39 AM
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Originally Posted by brad8266
Loose or not fully seated plug/wire connection is possible, also make sure the fuel filter connections are solid and not leaking.
Wouldn't this feel like an intermittent dead cylinder?
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Old 11-02-2008, 11:09 AM
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I checked the fuel filter connections on both sides and it's bone dry...
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Old 11-02-2008, 11:09 AM
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Could this be a sensor problem? Wouldn't this throw a code at me?
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