Is it me crazy or this gas pedal pulsation/vibration is a trait of 4runner?

pixologics

New member
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?
 
Register to hide this ad
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:
I thought our 4th gen have a "driver by wire" design (meaning there is no physical cable connecting the gas pedal to engine)??
 
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 ?

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.
 
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 :D
 
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:
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...
 
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.

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.
 
Front diff needle bearing.
Bad cv.

Is the engine running normal?

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.
 
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...

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.
 
can be the front wheel bearings. check for any play and turn steering wheel left right and if the vibs change then most likely the bearings are worn seals break down water then damages them,,

[MENTION=138935]catrains[/MENTION] Thanks for suggestion. Will try in some open area to keep doing round loop left/right to diagnose this.
 
Was your gas pedal assembly replaced under the unintended acceleration recall? If so, entirely possible it wasn't installed properly or isn't tight. The only real physical connection to the car is the mating of the assembly to the firewall, it's all electronics after that point.
 

Members online

Forum statistics

Threads
278,315
Messages
3,554,123
Members
248,016
Latest member
Advally Service

Trending content

Back
Top