Throttle Body Cleaning

[simontaylor]

Well, I notice on my new car, new to me but 114k miles, that the throttle does not return or drop very quickly at all, so I thought I should clean it as there has been much talk on the forum of cleaning them to resolve throttle hunting type problems.

So where is it?

Would it be the arrowed "S" pipe in the 5th pic down on this link?

or is it the ali bit the pipe connects to above?

http://www.lexusownersclub.co.uk/knowledge...x_v2&id=175&c=7

Thanks in advance. Simon.

[Leadfoot]

Would it be the arrowed "S" pipe in the 5th pic down on this link?

or is it the ali bit the pipe connects to above?

←

Hi Simon,

The throttle body is the aluminium casting that attaches to the "s" pipe you are referring to in that photo.

Check out

http://www.lexls.com/tutorials/EFI/throttlebody.html

Although I would recommend not scratching the back of the throttle butterfly as heavily as he did! :shutit:

It looks like a fair bit of work to clean it, how long does it take to drop the revs? Don't forget there is a lot of mass spinning around in a V8!

Cheers,

Leadfoot.

[simontaylor]

Thanks Leadfoot,

Looks like once I get the "S" air intake pipe off, I can assess how dirty it looks in the throttle body and a bit more if I open the butterfly.

I take your point on the V8 mass, I'm used to a rover 2.0 in line 4 (auto) which provides much more engine braking.

I'm just keen to get under the bonnent and get my hands dirty on that big lump of a V8.

I think "an inspection of the TB" will provide me with enough parts to clean up for now and if the TB is dirty, then it can be cleaned too.

As for the STP cleaner, I will have to have a closer look in my auto-sores to see what I can find, can you reccomend anything as a substitute or equivelant?

[davepruce]

here http://www.lexls.com/tutorials/EFI/throttlebody.html is a good tutorial on TB cleaning (also other tutorials). I did mine last year - much improved response etc