Did you order the one for 2003? I have a 2008 and nothing shows up - but it does show up for 2003.

It didn't ask about the year so I just ordered the only one I guess is possible. I guess the same part works for any of them. Worked fine.

Thanks, I'll order one and give it a shot.

changed mine smoother idle and acceleration now.

I have a 2007 Limited 4.7L with 13,500 when I bought it and it has this noise. I'm a retired mechanic so I wasn't scared by this noise, just baffled. The pulsation damper seems to be the fix. I will try that and report back on results.

I bought my 2007 Limited 4.7L with 13,500 miles on it a couple months ago. My noise is exactly as described at the beginning so I am going to switch it out after I get back from a trip. I will report on results then. To all of you worried about the noise I can tell you with certainty it is not a rod knock or bottom end noise (crank) or a cracked exhaust manifold.

Bad news. The knock was gone but was back this morning. Perhaps it was because it was about 40 degrees this morning and I didn't drive it at all yesterday. Will see how it is in the coming days.

awh the bad news...pls get back to us...

but i will still order this part ...

Still have the knock even with the new part and a fairly warm morning this morning. Goes away when the engine is warm.

Don't know if this has anything to do with it, but a couple of days after I changed the part I also switched oil from a 5w-30 blend to 0w-30 Mobil 1. I had never used synthetic before.

same here, exactly
well, except it goes away in a very few minutes, too quick to be much of a warm up

I take it to a train station which is only a 4-5 minute local street drive away. Nothing over 35 mph. By the time I get there and idle for another minute or two it is mostly gone.

Well, went out yesterday and the knocking is actually getting worse and happening longer while I'm driving. Turns into a slight gurgling sound when sitting at a stop and I was driving for about 30-40 minutes last night and it never went away.

After researching the Mexican made Standard Motors $34 part I ordered a little further and checking some Toyota OEM parts sites, I think that particular part I got from RockAuto is for the v6 engine.... and its likely not as well made as an OEM part.

I also went to this site to find out more about the part and its function and discovered it is factory calibrated so even more reason to go with OEM.....

http://www.autoshop101.com/forms/h42.pdf

I removed the $34 part this morning and plan to return it to RockAuto. I cleaned up and reinstalled the original part until the new one arrives. After reinstalling the original I'm not not getting any knock even at start up.

I went to Toyotapartszone.com and got this OEM part for $83 (including shipping to NJ).

23270-50012 - OEM Toyota DAMPER ASSY, FUEL PR

If the knock never comes back, I may return this one too. Perhaps reseating it was all it needed. Who the hell knows. All I know is that little noises from the engine make me nuts.

Will keep you updated.

Mine is still working fine. Maybe there are differences in the quality of the Rockauto part. At least for me it solved the problem...

Johnny how did you clean it and did you use a solvent of any kind? Thank you

It was just a surface cleaning with some Simple Green. I didn't submerge it in anything.