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Old 12-19-2015, 01:15 AM   #1
s.world123
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Member#: 436207
Join Date: Dec 2015
Smile 1998 Subaru Legacy outback vibration problem

Hello everyone, my car has 124000 miles and so far I changed

Water pump
Thermostat
Pcv valve
Spark plugs
Fuel filter
Air filter
Rotors
Pads
Pitch mount
Spark plug wires



Vibrations occur in park, neutral and drive. When I rev to 2000 rpm the car tends to shake a bit more. Motor and tranny mounts seem fine. Any help is much appreciated. Thanks
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Last edited by s.world123; 12-19-2015 at 03:08 PM.
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Old 12-19-2015, 01:29 PM   #2
darkstarmoto
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Member#: 44681
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Chapter/Region: Tri-State
Location: SouthEastern, PA
Vehicle:
2011 WRX SWP Hatch
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Mounts with that many miles probably need replaced, "looks" don't tell if they're worn out.

Is the engine actually running smoothly and nor throwing codes?
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Old 12-19-2015, 02:41 PM   #3
s.world123
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It's not throwing codes but the mounts look like they were replaced, I could be wrong but I can always give it a shot. I will try to replace motor mounts, should I replace the tranny mount as well ? I also changed the spark plug wires with Oem wires, still no change. And should I get Oem mounts or aftermarket? Thanks.

Last edited by s.world123; 12-19-2015 at 03:08 PM.
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Old 12-19-2015, 02:44 PM   #4
s.world123
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I also hear a hissing noise by the throttle body I don't know if that can also cause the problem I am having, again no cel light on.
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Old 12-19-2015, 06:14 PM   #5
darkstarmoto
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Join Date: Oct 2003
Chapter/Region: Tri-State
Location: SouthEastern, PA
Vehicle:
2011 WRX SWP Hatch
www.48hrs.info group lead

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First thing, check that the air box is properly closed, sometimes folks have trouble getting the bottom tabs together. Then check that all the hoses are plugged in to the ports in airbox. If those are good check the flexible couple between air box and throttle body. May have a hole or not clamped properly.

Try those first before messing with mounts.
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Old 01-02-2016, 05:35 PM   #6
s.world123
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It does sound like it is coming from the throttle body but I do not see any holes in the coupling, maybe I'll try to smoke the lines and see if there's anything coming out of the lines.
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