LS1TECH - Camaro and Firebird Forum Discussion

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- - Spark Knock after Tune-up (https://ls1tech.com/forums/new-ls1-owners-newbie-tech/1011132-spark-knock-after-tune-up.html)

Adam2001WS6

10-31-2008 01:27 PM

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.

Dustin AZ

10-31-2008 06:52 PM

Possibly a dumb question: What grade of fuel are you using?

- Dusin

2kta--89formula

10-31-2008 07:30 PM

What plugs did you use? Autozone gave me the wrong plugs once and it pinged like hell until I figured it out.

Adam2001WS6

10-31-2008 09:10 PM

93 Octane ALWAYS and I used NGK TR55 plugs.

brad8266

10-31-2008 09:24 PM

Loose or not fully seated plug/wire connection is possible, also make sure the fuel filter connections are solid and not leaking.

Adam2001WS6

11-01-2008 10:39 AM

Quote:

Originally Posted by brad8266 (Post 10399685)

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?

Adam2001WS6

11-02-2008 11:09 AM

I checked the fuel filter connections on both sides and it's bone dry...

Adam2001WS6

11-02-2008 11:09 AM

Could this be a sensor problem? Wouldn't this throw a code at me?

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