Fix for tapping at idle.

[Hillbilly Deluxe]

>Hopefully this is not a repost at XR-U.

That annoying tapping sound you hear at idle is not your lifters, injectors or your headers.
There is an emission control component called the PWM-vacuum switching valve screwed to the intake manifold on the drivers side. You can access it by removing the plastic shield over the intake manifold. It is held in place by a single screw. This thing activates when the vehicle is at idle and at temperature.
To minimize the tapping sound coming from it, you need to isolate this component from the manifold. The manifold is resonating the sound from the valve making it loud.
Here's what I did to minimize the noise:

You will need 2 rubber o-rings ( I used R03 nitrile o-rings) and a 10 mm Nutdriver or wrench.
After removing engine cover remove bolt that holds the valve to the manifold (no need to disconnect any lines or harness)
Place an O-ring on the bolt and push it to the head of the bolt.
Slip the bolt through the valve and slide the other o-ring over the bolt.
re attach valve tightening enough to compress the o-ring and snug the bolt. The o-rings should be enough to keep the bolt from vibrating out.
Replace cover and enjoy the silence!
***This may not eliminate this noise, but it sure quieted mine down.

So, don't worry about trying different weight oil (use the recommended only) or any other drastic measures. From what I have read, most if not all Toyotas in the last 5 years have this tick. Maybe the factory should do something about it. I think that Toyota should find a quieter valve or make an isolated mounting kit.

>http://www.fjcruiserforums.com/foru...-maintenance-tech/17848-fix-tapping-idle.html

>OK I think I am done editing this post.

 

[stretch200]

oh god I hope that fixes my ticking. Mine ticks like crazy. I took it to toyota and they told me that it was normal.

 

[07xrunner]

thank you god i hate that ticking noise :motz:

 

[DGXR]

I took mine too the stealership and they told me it was "the over-aggressive injectors". I knew that was a load of crap. Then a friend of mine told me it sounded like loose rocker arms from gunning it too much. Thanx for clarifying it. :top:

 

[DallasCowboys]

thank you god i hate that ticking noise :motz:

Turn up the salsa music and u won't b able 2 hear it.:wink:

 

[akakrill]

interesting....

 

[5H4D0WD347H]

can u eliminate this valve all together?

 

[Bobby B]

pics Pics Pics

 

[wshsbears]

pics Pics Pics

seriously... i have no idea what im lookin for here and i've had my engine cover removed for over a year and i've been all over these trucks..

thanks for the solution though. hope it works when i finally get around to doing it

 

[ddongbap]

Turn up the salsa music and u won't b able 2 hear it.:wink:

Or you could throw a ton of salsa on it.

 

[Hillbilly Deluxe]

Pic

I let my engine warm up to operating temperature and listened to it with a stethoscope, it sounded like this KNOCK KNOCK KNOCK KNOCK KNOCK KNOCK KNOCK KNOCK KNOCK KNOCK KNOCK KNOCK KNOCK KNOCK KNOCK KNOCK KNOCK KNOCK KNOCK KNOCK KNOCK.

 

[2006nightrider]

seriously... i have no idea what im lookin for here and i've had my engine cover removed for over a year and i've been all over these trucks..

thanks for the solution though. hope it works when i finally get around to doing it

yea, what bolt am I lookin for? im retarded:hmmmm2:

 

[Hillbilly Deluxe]

yea, what bolt am I lookin for? im retarded:hmmmm2:

It's on the drivers side right under your nose.

The part numbers are:
90910-AC001
MX136200-3110
DENSO 09G OR 6 27
12V MEXICO

It's 10mm.
This is the Toyota tick:wink:

 

[Hillbilly Deluxe]

yea, what bolt am I lookin for? im retarded:hmmmm2:

Here's my last pic, I am pushing this truck around in my garage by hand and I'm tired.:cheers:

 

[DallasCowboys]

yea, what bolt am I lookin for? im retarded:hmmmm2:

And U R a eagle fan!!:stupid::laugh:

 

[s/chargedxrunner06]

I let my engine warm up to operating temperature and listened to it with a stethoscope, it sounded like this KNOCK KNOCK KNOCK KNOCK KNOCK KNOCK KNOCK KNOCK KNOCK KNOCK KNOCK KNOCK KNOCK KNOCK KNOCK KNOCK KNOCK KNOCK KNOCK KNOCK KNOCK.

That's the purge valve (solenoid) for the evap. system, they operate on and off when the engine is running, to help all you have to do is insulate it so the noise isn't so loud.

 

[nxrunner]

That's the purge valve (solenoid) for the evap. system, they operate on and off when the engine is running, to help all you have to do is insulate it so the noise isn't so loud.

Any suggestions.... :eviltongue:

 

[s/chargedxrunner06]

Any suggestions.... :eviltongue:

I haven't done anything with mine because I'm half deaf anyway :laugh: but you can unbolt it from the intake (because the composite intake manifold increases the ticking noise) and zip stripe it to another location, and then you can wrap it up with foam padding which will reduce the noise, another method is to wrap it with the foam padding and use a rubber insulator where it bolts to the intake, that way you can bolt it back in the same location.

 

[skilledbum23]

nice i am so doing it this weekend

 

[Alexrunner]

is this tick bad for the truck or is it just a noise?