Harmonic Vibration
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From: La Grange Park, IL
Car: 1987 Iroc Z28/ 1982 Z28
Engine: 355 TPI IP/ 305 CFI
Transmission: T-56/ 300C
Axle/Gears: 3.42 Open/ 3.73 Posi
Harmonic Vibration
I have a slightly rough idle, native to the 60 degree v6's, thats nothing to worry about, sit smooths out at 1000-2000 rpms, but at 2100-3000 RPMS I have a strong harmonic vibration, the harmonic dampener is good. i just replaced the fuel pump, which actually took the vibration that was originally starting at 2k and got worse as it got higher. any ideas?
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From: Ogden UT
Car: '88 Camaro (Gone...)
Re: Harmonic Vibration
Just for what it's worth, it's actually 90* V6's that have the rough idle (a shake would be the better way to describe it, the motor fires smoothly), sounds like something else is up. Sorry I don't have anything else to offer
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roysatikas
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Sep 22, 2015 08:15 PM
