Why is my engine making this knocking sound

Asked by Levilangley03 Nov 16, 2020 at 12:38 AM about the 2009 Dodge Charger SRT8 RWD

Question type: Maintenance & Repair

My 2009 Dodge Charger srt8 seems to be pinging
or knocking when at freeway speeds but not idling.
Any ideas what this is?

4 Answers
157,475

Bob answered 3 years ago

What octane fuel are you using. That car requires premium.

Mark helpful

Levilangley03 answered 3 years ago

I’m using 91 which is the best my city has to offer. It’s strange to me because it’s only on the freeway. And it’s subtle and kinda fades in and out

Mark helpful
157,475

Bob answered 3 years ago

olgeezer, it has nothing to do with the governor. Octane ratings change with elevation. The higher above mean sea level you go the less dense the air and the lower the octane requirement is. Cities along the coasts have 93 available, here in Kansas we have 91 octane. As for the SRT8, I might try a spark plug change and check to see that the air filter is not dirty.

Mark helpful

Your Answer:

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