05-17-2019, 01:18 AM
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#1
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Is it me crazy or this gas pedal pulsation/vibration is a trait of 4runner?
Ever since I've purchased this 4Runner 2004 RWD (105k miles) I'm going crazy with only one issue in this truck. The gas pedal vibrates when I give acceleration. Its more severe/loud growling engine noise during first 10 minutes of cold start. Then after that its still there through out driving. Vibration varies to speed also notably to some uphill.
More is observed in city driving starting at 15mph-45mph. I call it vibration/pulsation that I feel in my feet when pressing gas pedal. Its feeling is like something you'll feel when you put your hands over mixer while its running (making milk shake). Anyways, a mixer will vibrate more its not that severe. But I could feel my feet bit numb/different after long drive.
On Freeways its less but its always there. Tried to put it in neutral and its not there much. I do acknowledge some of it could be due to wheel balancing. But its not that. I've experience driving lots of car I could tell if its wheel balancing is bad.
I recently did partial transmission fluid exchange. Its a non-sealed transmission. Oil color was very dark red/brown. The transmission was fine earlier as well but with 4 quarts exchange its bit better. It did not resolve my issue of vibration. Also tried 2OZ shudder FIXX. Did not help either.
Already showed it to 2 different very good toyota mechanics they both test drove car, both of them did not even bother to open and look under hood. They just shooed me away saying your car is fine, trust your car. Nothing they could do to fix. Did not charge me anything, not like I was not willing to pay. But if they are not even ready to look saying its fine, then its making me crazy where to take it to??
I do not have experience driving 4.0 trucks or large trucks. I've CRV as biggest suv other than that and its does not drive like it. Have had many toyota/lexus sedans in past and they are butter smooth. So, I don't know if its common for trucks to drive this way.
So I came here to ask one simple question. Is the vibration/sensation that I feel is common trait of 4runner or its really something wrong in my truck??
If its not common then any pointers what to tell mechanics to look into so that they could figure out if there's problem?
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05-17-2019, 10:15 AM
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#2
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Join Date: Sep 2017
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No, it is not normal to have a vibrating gas pedal. What country do you live in?
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05-17-2019, 10:26 AM
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#3
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arnt you the person with oddly matched tires? meaning 3 highway, 1 AT. ever resolve that first? also you say only a partial trans fluild change? why ?
Last edited by chaz; 05-17-2019 at 11:57 AM.
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05-17-2019, 10:27 AM
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#4
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Join Date: Mar 2010
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I thought our 4th gen have a "driver by wire" design (meaning there is no physical cable connecting the gas pedal to engine)??
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05-17-2019, 06:18 PM
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#5
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Quote:
Originally Posted by CookieRoe
I thought our 4th gen have a "driver by wire" design (meaning there is no physical cable connecting the gas pedal to engine)??
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Thats correct and makes me wonder what could be source of vibration.
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05-17-2019, 06:18 PM
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#6
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Quote:
Originally Posted by chaz
arnt you the person with oddly matched tires? meaning 3 highway, 1 AT. ever resolve that first? also you say only a partial trans fluild change? why ?
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Yes, I am same person. I did resolve tire issue. Did not help.
Partial fluid change because. I did not flush. I read various posts many suggested we could just do 4 quarts at a time and could do this process 3-4 times to get fresh fluid in place. I know its mixing up with old fluid. But I wanted to do it myself and give it a shot so 4 quarts for now. But there's no transmission issue here. It shifts just fine got even more smooth after partial fluid change.
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05-17-2019, 06:21 PM
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#7
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Quote:
Originally Posted by Seymore Butts
No, it is not normal to have a vibrating gas pedal. What country do you live in?
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California?
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05-17-2019, 07:02 PM
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#8
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Come on guys give me some technical areas that I could get diagnosed. Mechanics seem to have no clues or they dont want to waste my money
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05-18-2019, 08:43 AM
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#9
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if you got good & well balanced tires now, then check the u joints. not trying to be a jerk but isnt this the 2nd thread you started on this subject? if you google "4r gas pedal vibration" theres plenty of advice about it. good luck.
Last edited by chaz; 05-18-2019 at 09:00 AM.
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05-18-2019, 11:11 AM
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#10
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There could be a hundred things that vibrate in your 4Rrunner. The only way to figure it out is to look at all the possibilities one by one.
Wheels, engine mounts, transmission mounts, drive shaft, rough running engine, low cylinder contribution, defective or loose accessories or idlers, loose body panels, etc...
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05-18-2019, 11:57 AM
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#11
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Join Date: Dec 2012
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Front diff needle bearing.
Bad cv.
Is the engine running normal?
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05-18-2019, 01:05 PM
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#12
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Quote:
Originally Posted by chaz
if you got good & well balanced tires now, then check the u joints. not trying to be a jerk but isnt this the 2nd thread you started on this subject? if you google "4r gas pedal vibration" theres plenty of advice about it. good luck.
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Yeah I hear you...I've had searched. But there are different topics and most have no final resolution so thats why I am asking.
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05-18-2019, 01:06 PM
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#13
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Quote:
Originally Posted by BackOff
Front diff needle bearing.
Bad cv.
Is the engine running normal?
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Yes the engine runs normal, getting around 16-17mpg city and 22-23 freeway. It does sound weird in cold starts but settles down when temperature reaches operating level in middle. Takes around 2-3 miles or say 5-7 minutes.
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05-18-2019, 01:07 PM
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#14
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Quote:
Originally Posted by Seymore Butts
There could be a hundred things that vibrate in your 4Rrunner. The only way to figure it out is to look at all the possibilities one by one.
Wheels, engine mounts, transmission mounts, drive shaft, rough running engine, low cylinder contribution, defective or loose accessories or idlers, loose body panels, etc...
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Yes, I agree it could be anything. It seems like I need to visit some more mechanics who're willing to look in more detail.
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05-18-2019, 02:00 PM
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#15
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How many miles do you have on the truck right now? Have you had the wheel bearings checked lately?
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