Putting my phone speaker next to my ear I hear the “clicking” noise. Just sounds like top end valve noise, but you said it doesn’t change with rpm. If you revved higher I think we would hear it change frequency bit still be the same click clack taps.
Brand New 2021 Clicking Noise When Accelerating
- Thread starter sr1982
- Start date
Putting my phone speaker next to my ear I hear the “clicking” noise. Just sounds like top end valve noise, but you said it doesn’t change with rpm. If you revved higher I think we would hear it change frequency bit still be the same click clack taps.
Sonoran_Desert
Member
Sounds like a faint noise of an old film projector whenever you have your foot on gas. Ticking does not change relative to the increase or decrease in RPMs, so what is constant when accelerating that is not RPM dependent?
Super 8 Projector Sound & Old Film Animation Effects - YouTube
Super 8 Projector Sound & Old Film Animation Effects - YouTube
I have a different noise
My 2021 Venture has had a noise since rolling off the lot. It sounds like someone hitting the rear side window with a pebble. Seems to happen when the truck is on uneven ground, almost like if the body twists there is a pop or tap, what ever you want to call it, somewhere in rear inside 4runner. Very anoyying.
My 2021 Venture has had a noise since rolling off the lot. It sounds like someone hitting the rear side window with a pebble. Seems to happen when the truck is on uneven ground, almost like if the body twists there is a pop or tap, what ever you want to call it, somewhere in rear inside 4runner. Very anoyying.
Yes, this sounds exactly like the noise I hear!
Saker
Senior Member
So where is this supposed secondary pump located?
Get him to show you where it is.
Have you actually taken it in for them to find
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Saker
Senior Member
Correct me if I am wrong, but doesn’t the air injection pump only run at start up and shut down? !
Yes, I took it into service, but they never showed me. I actually just dropped it off at a different Toyota service department. I am interested to see what they have to say. They were a lot more receptive when I was explaining my problem than the first dealership.
After four hours at the dealership and four different test drives by service members, they acknowledge that the noise is not normal but they do not know what it is or how to fix it. I’ve got another appointment set up for Monday with the original service department of where I purchased a vehicle. They want to record the noise and send it to Toyota to open a service call, whatever that is? Also, I think I have narrowed the noise down to directly behind the tachometer.
I mentioned earlier that I am not sure when the air injection pump runs. Only at start up and shut down doesn’t make sense to me, but I have heard that stated before.
Sounds like OP finally has Toyota’s attention, hopefully we get to the bottom of this.
Let's hope!
I did a little research last night. It appears the air injection pump only runs when the engine is cold. By injecting air into the exhaust stream it burns the unburnt fuel which not only reduces unburnt fuel emissions but it also warms up the Catalytic converter faster and again reduces emissions. It's final benefit is to help the Catalytic converter last longer by preventing that unburnt fuel from reaching it. Just wanted to clear that up, i hate misinformation in forums. So, it seems the air injection pump doesn't run in any other condition once the engine/cat is warmed up. Again, not 100% on this.
OP, any updates on root cause?
OP, any updates on root cause?
I took it to the original dealership I purchased it from today and had what they said was their best technician ride along with me. At first acceleration pulling out he said, "I hear it, and that is NOT normal."
He apologized for all the misinformation given to me and said his initial reaction is that does not have anything to do with the engine.
He agreed the sound is coming from behind the tachometer, but doesn't know what it is. He said he would do a build inspection, to make sure it isn't somethin obvious from quality control. If unsuccessful he will then start pulling things apart and investigating even more. If unsuccessful after that he is going to make a recording and get in touch with Toyota's service bulletin line. AND if that is unsuccessful they will be requesting a visit from a Toyota engineer.
Well, I was called and told the problem was solved! I went up there and test drove it to verify, and if has been fixed!!
The tech said it was the steering boot located above the pedals. He said every time the 5th cylinder would fire it would cause vibration to occur to the boot. To fix it they added some additional silicone lubricant to the boot. I am not very handy when it comes to anything other than Jeep Wrangler/Gladiator lifts, so don't shoot the messenger.
None the less, this has been a HUGE headache that hopefully is behind me.
They did create a service bulletin because they said this problem was a bear to diagnose.
The tech said it was the steering boot located above the pedals. He said every time the 5th cylinder would fire it would cause vibration to occur to the boot. To fix it they added some additional silicone lubricant to the boot. I am not very handy when it comes to anything other than Jeep Wrangler/Gladiator lifts, so don't shoot the messenger.
None the less, this has been a HUGE headache that hopefully is behind me.
They did create a service bulletin because they said this problem was a bear to diagnose.
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Sonoran_Desert
Member
Would have never guessed that root cause and thanks for the update.
I had a few annoying and hard to diagnose noises when my T4R was new. When dealer's technician was able to solve them, they became my instant heros and I am still grateful to those techs who persevered.
Saker
Senior Member
Glad the issue was solved. I too would have never guessed that would cause the issue.
What stumped me was the cadence of the noise didn’t change throughout an rpm increase.
But now, since you have been in touch with the lead tech at your dealership, you should keep requesting him to work on your T4R whenever it has to go in for service.
Sonoran_Desert
Member
What do you think contributed to all the noise issues?
