Hello,
I have an 01 Acura TL. I started my car this morning and when I hit the accelerator, I heard a strange noise. It only seems to do it when applying the Gas pedal. It sounds like something is being restricted or a dull knocking kind of sound. I made 2 quick You tube videos.

COuld anyone tell me what they think it may possibly be?

Car has 118,000 miles on it. I had Timing belt, pulleys, Tensioners and water pump replaced 5,000 miles ago.


https://www.youtube.com/watch?v=L7ZD...ature=youtu.be

Cheers folks!

 

 

I don't have speakers but the ac belt tensioner is a popular item to wear out
Especially when the tension is released for other work and then re-applied

take a listen with a mechanics stethoscope ($4-10) or touch the tip of a long screwdriver to non moving part of tensioner- listen to top of screwdriver,
but the stethoscope can be obtained at harbor freight tools or any parts store and everyone should own at least 1, I have 3! get them on sale and can always find one close by wherever in the garage I am , toolbox, wall tools, race box, misc loose tools

 

try revving to 2500 and let off. with and without ac- does it get worse with ac ON? that's your prob! that belt tensioner
get the entire unit- roller-arm and tensioner assembly, under 100 bucks
plenty of other threads and a diy on installation on here

mine started making noise at 45,000 miles and finally went bad at 80kmiles

 

Sounds like a faulty Tensioner Bearing.

 

Thanks for the responses. It turned out the Bearing on the Idler Pulley tensioner was bad already. Looks like im back on the road again.

 

Knew it.. Glad you solve it out.