Vibrations over 3k rpms

ARrado15 · 01-11-2016, 12:52 AM

So I've noticed that when i'm on the highway and started going over 70 mph that there would be vibrations in the car. Kind of like a wheel is out of balance, but then I noticed that i get the same vibration when in 4th, 5th, or 6th gear right at about 3k rpms. It doesn't do it in the lower gears, and I noticed when in 6th that it is worse when accelerating, even if a very tiny amount. I don't really know how to explain it but it kind of feels like when your in a high gear and going slow and about to stall... would you guys know what i should check

Array · 01-11-2016, 09:33 AM

Alignment, always the first thing.. followed by braking components, rotors for deposits, pads, etc

I once hit a pothole pretty bad that I damaged my tire and vibrations only went away after I changed the tire

TBatt · 01-11-2016, 02:40 PM

Check your intake filter boxes. I had a similar problem and found a plastic bag had gotten sucked into the intake and was blocking one filter, drivers side if I remember correctly.

If the problem is speed related, which it sounds like, then it could be a problem with the drive line (drive shaft, rear end, axle shaft). If it is RPM related it will likely be the engine.

Good luck!

ARrado15 · 01-12-2016, 02:17 PM

Yea i'm going to try to get an alignment this week sometime to try and see if that's it. I don't think it's engine related just because it doesn't do it in lower gears, or if i rev it.

mishuko · 01-12-2016, 03:51 PM

tire pressure!

did you check that? someone had a similiar wobble issue and it was very inbalanced tire pressrues

Fountainhead · 01-15-2016, 02:20 PM

I feel a harmonic resonance kind of thing in my driveline at or around 3000 rpm. It goes away when I move rpm past that point or before that point.

YzGyz · 01-15-2016, 02:33 PM

Tire balance first then if that doesn't fix it, do alignment. After that,you will have to start poking around with rotors, arms, ect.

YzGyz

01-11-2016, 12:52 AM	#1 (permalink)
ARrado15 Base Member Join Date: Nov 2015 Location: Las Vegas Posts: 96 Drives: 370z M6 Rep Power: 16	Vibrations over 3k rpms So I've noticed that when i'm on the highway and started going over 70 mph that there would be vibrations in the car. Kind of like a wheel is out of balance, but then I noticed that i get the same vibration when in 4th, 5th, or 6th gear right at about 3k rpms. It doesn't do it in the lower gears, and I noticed when in 6th that it is worse when accelerating, even if a very tiny amount. I don't really know how to explain it but it kind of feels like when your in a high gear and going slow and about to stall... would you guys know what i should check

01-11-2016, 09:33 AM	#2 (permalink)
Array Enthusiast Member Join Date: Jun 2014 Location: home.jpg Posts: 286 Drives: '12 Pearly White Rep Power: 10	Alignment, always the first thing.. followed by braking components, rotors for deposits, pads, etc I once hit a pothole pretty bad that I damaged my tire and vibrations only went away after I changed the tire SouthArk370Z likes this. __________________ 2012 370z 7AT- ES2 with PSS, K&N Drop-ins, LED's all around, Berk HFC, FI CBE non-res, KW V1's 2003 A4 5MT- The Beater

01-11-2016, 02:40 PM	#3 (permalink)
TBatt Premium Member Join Date: Apr 2013 Location: Huntsville, AL Posts: 832 Drives: 2019 GT-R Rep Power: 20168	Check your intake filter boxes. I had a similar problem and found a plastic bag had gotten sucked into the intake and was blocking one filter, drivers side if I remember correctly. If the problem is speed related, which it sounds like, then it could be a problem with the drive line (drive shaft, rear end, axle shaft). If it is RPM related it will likely be the engine. Good luck! __________________ RJM pedal, Hotchkis Sway Bars, FI TDX, FOG Light, Z1 Slotted Drilled rotors, Stillen SC, Quaife ATB, Z1 Oil cooler, AEM Gauge Set, Galeforce gauge mount, Avant Garde M590 Hypersilver w/RE-11, TopgunZ A2A kit., ECUtek tuned by Seb: ROLL TIDE!

01-15-2016, 02:33 PM	#7 (permalink)
YzGyz A True Z Fanatic Join Date: Jun 2013 Location: Houston Posts: 1,449 Drives: 2010 Nismo Rep Power: 62	Tire balance first then if that doesn't fix it, do alignment. After that,you will have to start poking around with rotors, arms, ect. YzGyz __________________ http://www.the370z.com/members-370z-...gyzs-turn.html YzGyz

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01-12-2016, 02:17 PM	#4 (permalink)
ARrado15 Base Member Join Date: Nov 2015 Location: Las Vegas Posts: 96 Drives: 370z M6 Rep Power: 16	Yea i'm going to try to get an alignment this week sometime to try and see if that's it. I don't think it's engine related just because it doesn't do it in lower gears, or if i rev it.

01-12-2016, 03:51 PM	#5 (permalink)
mishuko A True Z Fanatic Join Date: Jul 2014 Location: bouncin on tigga Posts: 8,062 Drives: '12 Z Rep Power: 9434	tire pressure! did you check that? someone had a similiar wobble issue and it was very inbalanced tire pressrues

01-15-2016, 02:20 PM	#6 (permalink)
Fountainhead Track Member Join Date: Feb 2013 Location: FL Posts: 834 Drives: 2019 Civic Type R Rep Power: 14	I feel a harmonic resonance kind of thing in my driveline at or around 3000 rpm. It goes away when I move rpm past that point or before that point.