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Knocking sound.

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Old 08-29-2013, 08:41 PM   #1
Join Date: Aug 2013
Vehicle: 2000 Ford Mustang V6 Coupe
Location: TX
Posts: 1
Exclamation Knocking sound.

So I've been trying to figure out what is causing a knocking sound in my V6 2000 Ford Mustang Coupe. There is a definite knocking sound between 1000-1500 RPM. It only does it when the it's in drive (I have an automatic). Just revving doesn't cause the knocking but if you're driving, or holding the brakes in drive, and are between 1000-1500 RPM it's there. Reading a couple other posts about knocking, it doesn't sound as violent as a thrown rod, and it goes away above 1500 RPM, the engine seems to run fine, no roughness or anything. If I had to say it sounds like it's coming from somewhere it sounds like it's coming from the drivers side.

I've uploaded a video of the sound to Youtube for your listening pleasure.

Any help for a noobie would be greatly appreciated.
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Old 08-30-2013, 02:21 AM   #2
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Vehicle: 2000 mustang V6
Location: South Carolina
Posts: 195

whens the last time you changed your spark plugs?, im guessing cyl 6
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Old 08-30-2013, 07:49 AM   #3
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Join Date: Mar 2010
Vehicle: 2001 Ford Mustang V6
Location: TN
Posts: 1,512

Sounds like a valve to me. Might pour in a tiny bit of Marvel Mystery Oil. Wonder if it could be a lifter?

2001 Satin Silver Mustang V6
BBK Power Plus 70mm throttle body
Mac cold air intake
MAC long tube headers
MAC off-road H-pipe
MAC true dual exhaust
American Racing 5 spoke 17"
Nexen N3000 255/40ZR17 tires
MAC white face gauges
Cobra front end

My exhaust videos:

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Old 08-30-2013, 10:52 AM   #4
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Join Date: May 2008
Vehicle: 65' Mustang, 04 Mustang V6, 03 Silver Metallic Cobra Convertible 1of311, 96 Mustang Gt Steeda
Location: Ca
Posts: 849

run some techron fuel additive cleaner clean the injectors, id possibly look into a tune up wires oil etc..
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Old 09-03-2013, 10:28 PM   #5
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Vehicle: 2000, Ford, Mustang
Location: CA
Posts: 127

we have a similar sound - not as pronounced... drive my son crazy, it just sounds like valves tapping to me
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