Lately, I have been having minor, but noticable engine vibrations between 2250-2750 RPMs in my 2001 Sahara. The vibrations are RPM dependant and not associated with any speed or gear. I have checked my fan blades and turned the A/C off, but there is no change. This isn't a stroker related problem, but it's still the AMC straight six. Any suggestions would be greatly appreciated.
David
Engine Vibs
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- Noob
- Posts: 10
- Joined: August 20th, 2014, 10:17 am
- Vehicle Year: 2001
- Vehicle Make: Jeep
- Vehicle Model: TJ
- SilverXJ
- Global Moderator
- Posts: 5790
- Joined: February 14th, 2008, 7:14 am
- Stroker Displacement: 4.6L
- Vehicle Year: 2000
- Vehicle Make: Jeep
- Vehicle Model: Cherokee
- Location: Radford, Va
Re: Engine Vibs
Check your harmonic balancer. Check your engine mounts. Check your transmission mounts. Check exhaust mounts and for any interference with the frame or body from the exhaust piping. When was the last time you did a tune up?
2000 XJ. 4.6L stroker
00+ Viper Coil Swap | CPS Timing Increase Mod | Fabricated Airbox | Dash bezel, Arduino Multigauge & RD Conceal
Eat, breath, drink, sleep, Jeep, drink
00+ Viper Coil Swap | CPS Timing Increase Mod | Fabricated Airbox | Dash bezel, Arduino Multigauge & RD Conceal
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- Noob
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- Vehicle Year: 2001
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Re: Engine Vibs
So it's been a while, and I am still having vibration issues. I did a complete frame swap, and I replaced my harmonic damper, motor mounts, and transmission mount. I'm still seeing vibrations between 2250 and 2750 rpms. Any thoughts? I know the clutch was replaced before I bought the Jeep, but the vibration is fairly new.
- SilverXJ
- Global Moderator
- Posts: 5790
- Joined: February 14th, 2008, 7:14 am
- Stroker Displacement: 4.6L
- Vehicle Year: 2000
- Vehicle Make: Jeep
- Vehicle Model: Cherokee
- Location: Radford, Va
Re: Engine Vibs
What about ignition and fuel supply, etc? When was the last time you did a tune up?
2000 XJ. 4.6L stroker
00+ Viper Coil Swap | CPS Timing Increase Mod | Fabricated Airbox | Dash bezel, Arduino Multigauge & RD Conceal
Eat, breath, drink, sleep, Jeep, drink
00+ Viper Coil Swap | CPS Timing Increase Mod | Fabricated Airbox | Dash bezel, Arduino Multigauge & RD Conceal
Eat, breath, drink, sleep, Jeep, drink
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- Noob
- Posts: 10
- Joined: August 20th, 2014, 10:17 am
- Vehicle Year: 2001
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- Vehicle Model: TJ
Re: Engine Vibs
Not to sound like a smart ass, but define tune up. I've replaced the plugs, oil, and all the filters. There are no obvious signs of a misfire. Fan clutch maybe? Throw out bearing? I'm at a loss.SilverXJ wrote:When was the last time you did a tune up?
- SilverXJ
- Global Moderator
- Posts: 5790
- Joined: February 14th, 2008, 7:14 am
- Stroker Displacement: 4.6L
- Vehicle Year: 2000
- Vehicle Make: Jeep
- Vehicle Model: Cherokee
- Location: Radford, Va
Re: Engine Vibs
Remove the serpentine belt and run it to the vibration RPM to see if it does anything different. Of course, make it quick though. Its noticable in neutral standing still I would assume?
2000 XJ. 4.6L stroker
00+ Viper Coil Swap | CPS Timing Increase Mod | Fabricated Airbox | Dash bezel, Arduino Multigauge & RD Conceal
Eat, breath, drink, sleep, Jeep, drink
00+ Viper Coil Swap | CPS Timing Increase Mod | Fabricated Airbox | Dash bezel, Arduino Multigauge & RD Conceal
Eat, breath, drink, sleep, Jeep, drink
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- Noob
- Posts: 10
- Joined: August 20th, 2014, 10:17 am
- Vehicle Year: 2001
- Vehicle Make: Jeep
- Vehicle Model: TJ
Re: Engine Vibs
Great idea! I tried removing the belt, but the vibration still exists.
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