As you might have guessed, I'm not exactly familiar with the contents of the engine bay, so simple instructions would be great! And pictures would be even better!
Cleaning Throttle Body
Cleaning Throttle Body
Can anyone tell me where the throttle body is on a 1.6GTI engine, how to get to it, and how to clean it?
As you might have guessed, I'm not exactly familiar with the contents of the engine bay, so simple instructions would be great! And pictures would be even better!
As you might have guessed, I'm not exactly familiar with the contents of the engine bay, so simple instructions would be great! And pictures would be even better!
It's to the right of the airbox, the pipe that goes from the right hand side of the airbox goes down into it(TB is vertical on this car)! the inlet manifold is below the airbox and the exhaust manifold is on the forward side of the engine. And may I take this opportunity to say, what a s**t way to do it, as it's impossible to keep an aftermarket airfilter cool cause of the heat soak from the inlet manifold, stupid having it right above it and at the back of the engine bay,stupid,stupid............!
Need to remove the airbox, the pipe that goes to the TB just pulls off the TB! I cleaned it a lot when I had the standard air box as the oil breather goes to the engine side of the filter so you get a lot of oily s**t building up, worth giving the inside of the filter box a wipe as well!
Can see it in this pic of M1's Loop, with the BMC going into it! sorry couldn't find a better photo!
Need to remove the airbox, the pipe that goes to the TB just pulls off the TB! I cleaned it a lot when I had the standard air box as the oil breather goes to the engine side of the filter so you get a lot of oily s**t building up, worth giving the inside of the filter box a wipe as well!
Can see it in this pic of M1's Loop, with the BMC going into it! sorry couldn't find a better photo!
?
from what I see here, I presume this BMC is not a standard air box, correct? 
I have the standard flat top that covers the spark plugs and leads etc. a large flat back box over the whole engine... This seems to lift at the back end, but not anywhere else?!?!
Do I have to unscrew all those star screws to lift the hole flat pack off the top of the eingine?
I guess the air filter is in the back end if this flat pack box arrangement, yes?
I have the standard flat top that covers the spark plugs and leads etc. a large flat back box over the whole engine... This seems to lift at the back end, but not anywhere else?!?!
Do I have to unscrew all those star screws to lift the hole flat pack off the top of the eingine?
I guess the air filter is in the back end if this flat pack box arrangement, yes?
Thats the engine cover, it pulls up at the back and unclips at the front, if you put your fingers under you can feel where it's clipped on. The standard airbox is the black box below the rear half of the engine cover. Think the engine cover on the polo gti is different to the lupo gti from what I remember so it may be different for you guys!
@snoopstah, there was a guy asking today how to change the airbox in the lupo chat section at clublupo and I left instructions there how to take it off but it is really simple! You don't actually have to take off the airbox to get at the internals of the TB as the airbox pretty much just opens out to it, if you take the filter element out you'll see what I mean!
I'll be back soon to ask for help once you've investigated it further as my next mod is to change the inlet manifold for a sorg one!
@snoopstah, there was a guy asking today how to change the airbox in the lupo chat section at clublupo and I left instructions there how to take it off but it is really simple! You don't actually have to take off the airbox to get at the internals of the TB as the airbox pretty much just opens out to it, if you take the filter element out you'll see what I mean!
I'll be back soon to ask for help once you've investigated it further as my next mod is to change the inlet manifold for a sorg one!
All done. Picked up a carb cleaner that claimed it was safe on plastics/rubber - better safe than sorry!
First step was disconnecting the negative battery terminal - better safe the sorry. Then proceed by removing the airbox cover - 7 crosshead screws. I found that a couple of mine were loose, so it was a good thing to do anyway. Remove the cover and the air filter.
Then it's time to remove the filter box. Pull off the pipe leading into the left of the box, and find the two allen key screws, one in front of the airbox, and one in the middle and to the right.
With these removed, the filter box is loose. You could remove the air intake coming into it, but I couldn't be bothered, as I found there was plenty of slack to pivot it out of the way of the throttle body. Which is in the circular hole on the right hand side of where you removed the airbox, yay!
Now you could just spray some cleaner in there, but I wanted a more thorough job than that, so out come the four allen bolts surrounding the throttle body entrance. The throttle body is now loose, and can be moved about a bit, even with the pipework and connectors still attached. This lets you get to the back of the throttle body and spray both sides thoroughly. Try to stay upwind of the spray though - it really doesn't taste nice!
Reassembly is the reverse of removal, as they say.
In my case, the throttle body was pretty badly clagged up (especially considering it's only done 14,000 miles!) This meant that, with it being clean and being able to close fully again, the ECU got all confused, with the result that the car wouldn't start without the accelerator pedal being pressed, and would stall as soon as you let off! Fear not! This can be solved by driving it for a few miles (trying to stall as little as possible) to recalibrate the throttle body. Alternatively, a far easier and quicker was is to re-adapt the throttle body using VAG-COM if you have it - instructions are here, follow the ones for DBW vehicles.
Thanks for the help!
First step was disconnecting the negative battery terminal - better safe the sorry. Then proceed by removing the airbox cover - 7 crosshead screws. I found that a couple of mine were loose, so it was a good thing to do anyway. Remove the cover and the air filter.
Then it's time to remove the filter box. Pull off the pipe leading into the left of the box, and find the two allen key screws, one in front of the airbox, and one in the middle and to the right.
With these removed, the filter box is loose. You could remove the air intake coming into it, but I couldn't be bothered, as I found there was plenty of slack to pivot it out of the way of the throttle body. Which is in the circular hole on the right hand side of where you removed the airbox, yay!
Now you could just spray some cleaner in there, but I wanted a more thorough job than that, so out come the four allen bolts surrounding the throttle body entrance. The throttle body is now loose, and can be moved about a bit, even with the pipework and connectors still attached. This lets you get to the back of the throttle body and spray both sides thoroughly. Try to stay upwind of the spray though - it really doesn't taste nice!
Reassembly is the reverse of removal, as they say.
In my case, the throttle body was pretty badly clagged up (especially considering it's only done 14,000 miles!) This meant that, with it being clean and being able to close fully again, the ECU got all confused, with the result that the car wouldn't start without the accelerator pedal being pressed, and would stall as soon as you let off! Fear not! This can be solved by driving it for a few miles (trying to stall as little as possible) to recalibrate the throttle body. Alternatively, a far easier and quicker was is to re-adapt the throttle body using VAG-COM if you have it - instructions are here, follow the ones for DBW vehicles.
Thanks for the help!
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Josh_PoloGTi
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I've got a K&N Panel filter, and that got filthy (as well as the TB) because of the Crank-Case Breather...
I've blocked the hole off (the one on the side of the airbox where the small crankcase breather pipe plugs in) and I've put a small breather filter on the end of the pipe instead.
Cleaned the TB and the K&N and we all good baby!
I've blocked the hole off (the one on the side of the airbox where the small crankcase breather pipe plugs in) and I've put a small breather filter on the end of the pipe instead.
Cleaned the TB and the K&N and we all good baby!