[DIY] Cleaning your throttle body

Izso

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First, identify where your throttle body (TB) is. Since my Myvi is still using cable (and not electronic) I just locate where the cable is and voila, there's my TB.


Ensure you remember how the vacuum hoses and what not are connected. You do not want to mess this up as it can adversely affect your fuel consumption and performance.


Look for all the hoses, sensor plugs, bolts and screws that hold your TB down and remove them. If you have a zillion bolts and nuts, make sure you take a picture with your trusty camera for reference later (like I have... just in case).


Remove all the rubber o-rings if possible and clean them separately. Be gentle in case they break and if already brittle, I suggest you replace them. They sell for about RM1.50 to RM5 at your friendly spareparts store.



You can try to clean the intake manifold as well if you like. Easiest would be to just wipe what you can like this or spray throttle body cleaner in there and fire up the engine (after reinstalling everything) to burn off the excess cleaner and gunk you've washed off. Or if you're really thorough, dismantle the manifold and clean it separately (recommended!)


Clean off the oily gunky bits. Don't miss the PCV hole area too. If you don't have a oil catch tank this intake will be pretty dirty. I used carb/throttle cleaner to do this. Some people prefer to use petrol since it's cheaper (you only need a tiny bottle of RM1.00 RON95 to do this).


Nice and clean. Reinstall everything back the same way you removed it starting with the rubber o-rings.


Cost of TB Cleaner spray : RM14.50
Time taken to do this : 20 minutes
Not having to pay the mechanic RM50 to do this simple job : Priceless


Note : Some TBs have very sensitive throttle position sensors like the Wira VDO TB. Handle with care and do not handle it roughly otherwise you may need to go back to the manufacturer to have the ECU reset to clear the fault codes.
 

D7zul

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and just in time too..

i'm planning to clean my Carb this weekend.. :biggrin:

actually, i saw a pomen cleans a carb without opening it.. he juz rev the engine & spray the carb cleaner while engine running...

he do like this.. rev, spray & close the carb with his hand.. & he does it like 10 times..

can be done like that ka? not so clean i think..
 

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one more thing dont simply2 adjust the TPS or your car will suck more fuel...:nurse::nurse::nurse::nurse::nurse::driver::driver:
 

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bro zul,
r u planning to clean ur ae101 svt on this weekend? can u capture the photo and share to us 4ageclub member. coz i think a lot of ppl must interesting with this thread:rock:
 

D7zul

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bro zul,
r u planning to clean ur ae101 svt on this weekend? can u capture the photo and share to us 4ageclub member. coz i think a lot of ppl must interesting with this thread:rock:
eh... no la..

i did my SVT a few months ago at a mechanic shop.. did top overhaul and cleans everything.. i think it's still clean :biggrin:

this weekend wanna do my KE70 carb.. alwayz jerking when full throttle :banghead:
 

Izso

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and just in time too..

i'm planning to clean my Carb this weekend.. :biggrin:

actually, i saw a pomen cleans a carb without opening it.. he juz rev the engine & spray the carb cleaner while engine running...

he do like this.. rev, spray & close the carb with his hand.. & he does it like 10 times..

can be done like that ka? not so clean i think..
Actually it's not gonna be so clean that way but it's easier than taking out everything and accidentally messing with the tuning. Carbs work in mysterious ways. My old Carb Wira was a nightmare to clean, everytime I took it apart, I'd always have to retune it because something would go out of synch. Very irritating. EFI for life! Hehe :biggrin:
 

D7zul

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Actually it's not gonna be so clean that way but it's easier than taking out everything and accidentally messing with the tuning. Carbs work in mysterious ways. My old Carb Wira was a nightmare to clean, everytime I took it apart, I'd always have to retune it because something would go out of synch. Very irritating. EFI for life! Hehe :biggrin:
yeah.. EFI for life..

just need the $$$..

:biggrin:
 
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D7zul

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update..

done my 'cleaning'.. not as thoroughly as Izso did.. but ok la..

buy a can of STP Carb Cleaner.. and follow instruction on d can..

pictures enclosed..
 

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ylkien

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ylkien

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Nice DIY.

Just a few notes. Make sure the adjustment screws are not changed, else will need to recalibrate the TB.

There should also be a small gap between the valve and body (the carbon that you clean off is blocking this).
 

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regard the second and third picture from D7zul, may i know what is the 2 sharp rod which looks like the sharp edge of a drinking straw are for? Wonder what is it use for and where it leads to? Can i spray carb cleaner into it?
 

D7zul

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regard the second and third picture from D7zul, may i know what is the 2 sharp rod which looks like the sharp edge of a drinking straw are for? Wonder what is it use for and where it leads to? Can i spray carb cleaner into it?
not sure what those rods are for.. there are similar rods further down the carb & it supply fuel to d engine..

i only spray at places that's with oil stain.. the rods are sweaky clean.. so, i don't bother to spray on it :biggrin:
 

mike77kl

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ok, gd point Izso-san. Then how bout this....i heard people pour water into the TB but
i got another idea. Can i use the flower plant water spray to spray a mist to the TB?

I got read about water injector system to save fuel, cool, and clean the engine.
Maybe i might install one later, any advice?
 

D7zul

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ok, gd point Izso-san. Then how bout this....i heard people pour water into the TB but
i got another idea. Can i use the flower plant water spray to spray a mist to the TB?

I got read about water injector system to save fuel, cool, and clean the engine.
Maybe i might install one later, any advice?
water & oil doesn't mix..

i think what u read is the methane + water injection system..

that's a different system from our regular fuel + air system..

or maybe u've read the Hydrogen Generator system using water..

like this thread (the last few pages)..

http://www.zerotohundred.com/newfor...iy-the-probably-the-only-real-fuel-saver.html
 

Izso

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actually not true dzul.

The Snow performance gadget can either pump in methanol (pure), mixture or just plain water. If water, the problem is the mist isn't fine enough and may end up causing more harm than good.

Mike, you can but how do you intend on setting up the pump? You need really fine water droplets otherwise you might have piston damage.
 
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mike77kl

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Then how about i go buy a electronic fuel injector and use it to inject water mist instead?
Is this idea ok? The water i think i am gonna havest from the aircond water.

Or i go supermarket and get the mist generator, i think is an induction coil and run on 24VAC.
Can i tap AC right after the alternator and just b4 the bridge diode? Here is what i plan to
use, with a water container, put water in it and throw the mist generator into it and power it
up, then cover up the container and make 2 hose on top of it, one is a breather hose to suck
in air from outside (filtered), the other hose will connect to the carb to let it suck the mist. Water again i plan to harvest from the aircond. Pls comment.
 

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Then how about i go buy a electronic fuel injector and use it to inject water mist instead?
Is this idea ok? The water i think i am gonna havest from the aircond water.

Or i go supermarket and get the mist generator, i think is an induction coil and run on 24VAC.
Can i tap AC right after the alternator and just b4 the bridge diode? Here is what i plan to
use, with a water container, put water in it and throw the mist generator into it and power it
up, then cover up the container and make 2 hose on top of it, one is a breather hose to suck
in air from outside (filtered), the other hose will connect to the carb to let it suck the mist. Water again i plan to harvest from the aircond. Pls comment.
Not quite the right place to ask but sounds like it might work. I don't think those mist generators run on AC? Or was it DC? I had a chat with Drexchan on this since he had the same idea as you. But the main problem he faced was powering the device. Apparently it would suck up a lot of power and negate the effects of the mod in the first place.

Anyway, let's talk PM since this is out of topic.
 

D7zul

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Not quite the right place to ask but sounds like it might work. I don't think those mist generators run on AC? Or was it DC? I had a chat with Drexchan on this since he had the same idea as you. But the main problem he faced was powering the device. Apparently it would suck up a lot of power and negate the effects of the mod in the first place.

Anyway, let's talk PM since this is out of topic.
cc those PM to me :biggrin:

better yet.. start a new thread :biggrin:
 

mike77kl

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ok, sorry for off topic. Now bk on topic, diy clean the TB.

Tomorrow i plan to go get myself a carb cleaner. May i know
whats the recommended brand and expected price?
There are dozen of brands on the shelf out there.

B4 this i got remove the airbox of my old Saga 12V then i saw the air filter
and i remove it as well, then i see an opening from the top of the carb.
Its an Aisan Variable Venturi with auto chock carb. So i just spray into the hole?
From there i cannot see the butterfly valve and it would give me a feeling i am
spraying at nothing.
 

Izso

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Honestly - what I used to do with my old carbie was just spray it in with the engine running. Probably isn't the best way.

Anyone with a carb can advise?
 

mike77kl

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Already bought the carb cleaner, brand 3M. The instruction says spray when engine off,
spray and leave it for 20 minutes. I have not try it yet. Now i worry i cant start the engine
afterwards due to heavy floods with big pieces of gunks that got loose and broke off.
It could be a thick 20 years old gunk i am dealing with.

Ok now one question, will the carb cleaner eat away seals and gaskets and make my carb
leaking? I plan to spray every time just b4 the engine oil changed coz i scare i might
contaminate the oil. Means every 5000km i be spraying the carb, i scare slowly it gets leaky.
 
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Izso

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Already bought the carb cleaner, brand 3M. The instruction says spray when engine off,
spray and leave it for 20 minutes. I have not try it yet. Now i worry i cant start the engine
afterwards due to heavy floods with big pieces of gunks that got loose and broke off.
It could be a thick 20 years old gunk i am dealing with.

Ok now one question, will the carb cleaner eat away seals and gaskets and make my carb
leaking? I plan to spray every time just b4 the engine oil changed coz i scare i might
contaminate the oil. Means every 5000km i be spraying the carb, i scare slowly it gets leaky.
It shouldn't.
 

mike77kl

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Pls help me, my Saga cannot start after i spray the carb hole with 3M carb cleaner.

I just follow the instruction. It says off the engine, spray the carb hole and leave it
soak for 20 minutes then start the engine. But i crank for like 10 seconds non stop
and the engine wont turn. Then i let go and crank again for another 10 seconds
non stop and engine still wont run. I kept doin like this for 3-4 times still wont
start, pls help me!!

Luckily my battery is strong from a good charge coz i just balik kampung from
KL to Butterworth last nite and tot today holiday i want to clean the damn carb.
So i start the engine and drove the car to a nice padang where nobody is around
coz i scare to smoke up the place. Once i reach the padang, i shut off the engine
and start spraying like nobody business onto the carb. After spray, the carb hole
looks damn clean, and i let it soak for 20 minutes and then i went to start the engine
but it wont turn over, i kept cranking and the engine just wont come alive and run
on its own. Now my car is abandon at the padang, pls help. What is wrong with it man.
 
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tks84

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Alot of thng to check..can be disterbuter kot...spark plug wire connection loose..or rosak...
Usually i do it at home..off engine,spray till all look clean..let it soak a while..it will be hard to start at first cos the fume still in there...
Just wait a while more and try again...when start drive to empty road,remain engine on spray while pulling the trottle cable...then wack drag a bit ok liow...
 
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Mike, check your plugs. Might be wet. Clean them and retry
 

mike77kl

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I see the butterfly valve on my carb is not dirty at all since fuel always
drip on it and get it wet. So carb cleaner for me is no fun since there is
nothing to be clean and even i spray on the carb hole, i feel no difference.
Perhaps its already clean. So buying a carb cleaner and did the job, the
return is zero satisfaction.

I dun know doin the below is right or not.

To clean off carbon inside combustion chamber, i asked my wife to rev up
the engine to 2k rpm, then i remove the hose from the PCV valve and spray
carb cleaner into the hose so that the cleaner could get right into the intake
manifold after the carb. What unexpected is, when i spray the cleaner in,
the engine will rev itself higher though my wife is holding the throttle constant
at 2k rpm. I tot the engine would sputter and wanna die, but instead it rev up,
this effect is totally unlike the when spray onto carb, the engine would sputter.
And one more thing i found out is, if u dun rev the engine and let it idle, taking
off the hose from the PCV valve would stall the engine, i think maybe due to
massive air leak, but instead if u remove the PCV valve from the valve cover
with the hose still attached, the engine would still idle due to there is still some
restriction in the PCV valve, not like a free flow and massive air leak alike.
 
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Izso

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I see the butterfly valve on my carb is not dirty at all since fuel always
drip on it and get it wet. So carb cleaner for me is no fun since there is
nothing to be clean and even i spray on the carb hole, i feel no difference.
Perhaps its already clean. So buying a carb cleaner and did the job, the
return is zero satisfaction.

I dun know doin the below is right or not.

To clean off carbon inside combustion chamber, i asked my wife to rev up
the engine to 2k rpm, then i remove the hose from the PCV valve and spray
carb cleaner into the hose so that the cleaner could get right into the intake
manifold after the carb. What unexpected is, when i spray the cleaner in,
the engine will rev itself higher though my wife is holding the throttle constant
at 2k rpm. I tot the engine would sputter and wanna die, but instead it rev up,
this effect is totally unlike the when spray onto carb, the engine would sputter.
And one more thing i found out is, if u dun rev the engine and let it idle, taking
off the hose from the PCV valve would stall the engine, i think maybe due to
massive air leak, but instead if u remove the PCV valve from the valve cover
with the hose still attached, the engine would still idle due to there is still some
restriction in the PCV valve, not like a free flow and massive air leak alike.
I admire your courage to try things! And you're right, the will sputter but it's not going to die just because you yanked out the PCV. But I doubt cleaner sprayed into the hose will do much. I'm not a carbie head and when I owned one I wasn't very well versed with the carbie. Hopefully some carbie like Fred will come in and shed some light.


thanks izso..is it possible to DIY this on satria neo?..surely this thing will fill up my weekend..
Yes of course it's possible. Just need to know where your PCV is
 

punk

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Hello bro izso,
for this diy, after cleaning the throttle body using petrol and fix back everything and finally start the car but the car timing lari..
During idle time,the timing was not stable..
Is it the same thing if we take out negative terminal of the battery to reset the ecu with reset at perodua??
 

Izso

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Hello bro izso,
for this diy, after cleaning the throttle body using petrol and fix back everything and finally start the car but the car timing lari..
During idle time,the timing was not stable..
Is it the same thing if we take out negative terminal of the battery to reset the ecu with reset at perodua??
You always run a risk of upsetting the ISC motor in the TB, were you gentle with the cleaning? No sudden shakes or knocks? If yes then the ISC has been messed up. You just need to reset the ECU and clear the fault codes. I've tried taking out the battery but the result isn't the same as using the machine to reset the ECU.
 

punk

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You always run a risk of upsetting the ISC motor in the TB, were you gentle with the cleaning? No sudden shakes or knocks? If yes then the ISC has been messed up. You just need to reset the ECU and clear the fault codes. I've tried taking out the battery but the result isn't the same as using the machine to reset the ECU.
i did accidently knock the tb and don't have the chance to take out the battery to test the result but being advised to reset at perodua..
thanks for the info..
 

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That's a good question. I've no idea! But I don't see any harm of pulling out the battery unless you have a piggy back or standalone. If yes then better not.
 

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my kelisa accelerator is like stuck when pressing, and i need to press hard. i suspect is my TB maybe got dirt, so i decide to diy clean TB.
anyway am using WD40, first am using tissue paper, spray to tissue paper and then wipe the butterfly and around the inner side. u will see ur white tissue paper become black like batu arang. as i do not remove out the TB, am using my little finger to squee in every corner of TB and clean it until i satisfied. after done test press the accelerator, wow! become smooth and few day later, my fuel consumption is more better. Am relieve and save some $$$ from goin to workshop being kena chop.
PRICELESSSSSS!!!!
 

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But as a general rule, I don't recommend WD40 as the oil will still get sucked into the manifold eventually - not quite a good thing but not gonna kill you
 

huakenny

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bro,if electronics type throttle body ,is it necessary to take out battery if wan diy clean it??
u cant open the tb wit ur fingers...it will just damage the tb

a fren of mine(mechanic) helping a customer clean his nissan x-trail....which he tot can use the same method....electronic type tb...he open the butterfly wit finger as usual...after clean and start the engine...

check engine light pop-on the dashboard and after diagnosed...the tb is gone. replaced the new one for customer. try to earn rm70 end up paid rm1xxx for the tb
 

punk

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u cant open the tb wit ur fingers...it will just damage the tb

a fren of mine(mechanic) helping a customer clean his nissan x-trail....which he tot can use the same method....electronic type tb...he open the butterfly wit finger as usual...after clean and start the engine...

check engine light pop-on the dashboard and after diagnosed...the tb is gone. replaced the new one for customer. try to earn rm70 end up paid rm1xxx for the tb
Nice info bro..i didn't know that..
Lucky my TB still fine..
 

huakenny

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Nice info bro..i didn't know that..
Lucky my TB still fine..
with the ignition on...the butterfly can be open with someone in the car press on the accelerator....

u can clean it in this way if u wish to :)
 

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bro Izso,
ur DIY really inspired me to clean my TB...thx a lot...Immediately, I went to the nearest spare part/hardware shop to buy the necessary stuff..I followed all the steps given by u...unfortunately, during installing all those nuts, hose, sensors,etc, I figure out that the smaller rubber O ring left...I immediately look again at ur DIY and there are two types of rubber O ring...I really thought that smaller O ring is the new one that u want to replace...please advice me the exact location of the small rubber O ring...huhu...
 

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bro Izso,
ur DIY really inspired me to clean my TB...thx a lot...Immediately, I went to the nearest spare part/hardware shop to buy the necessary stuff..I followed all the steps given by u...unfortunately, during installing all those nuts, hose, sensors,etc, I figure out that the smaller rubber O ring left...I immediately look again at ur DIY and there are two types of rubber O ring...I really thought that smaller O ring is the new one that u want to replace...please advice me the exact location of the small rubber O ring...huhu...
Here on the plastic intake manifold before u put ur Throttle body.
*Not inside manifold.:rofl:
 

samurai76

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thx bro...I did the TB cleaning process yesterday night..thats why I couldnt notice the smaller o-ring...
 

samurai76

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during initial engine start up this morning, i found out that heavy smoke came out from the exhaust tail and it remains for few minutes..is it normal ??...and also the rpm went high as 2500..then it went down to 2000 rpm..until now the rpm is between 1500 - 2000..is it normal ?? should I send to p2 service centre to re-tune..help me2x...
 

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during initial engine start up this morning, i found out that heavy smoke came out from the exhaust tail and it remains for few minutes..is it normal ??...and also the rpm went high as 2500..then it went down to 2000 rpm..until now the rpm is between 1500 - 2000..is it normal ?? should I send to p2 service centre to re-tune..help me2x...
yes bro, jus send to p2 to tune it. Rm17 only.
Jus like the diy said, u should handle with care. maybe u knock it dy.
Some say can reset by taking out negative terminal for 15 minutes and so on but jus go to p2 to tune it better.
 

samurai76

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thx bro punk for the input...this morning I havent put the smaller o-ring back to its origin place as suggested by u in the earlier msg...got no time lahh...end up with I drove the car to office with high rpm and the engine sounds so loud as well..conversely, I figure out that the engine performance is running so smooth, faster, etc....just know, I reopen all the sensors,bla bla mere to put the smaller o-ring..then, reinstall back the sensors, etc and start the engine....YESS...the rpm back to normal...just want to scream out loud...full satisfaction...:driver:
 

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bro Izso,
ur DIY really inspired me to clean my TB...thx a lot...Immediately, I went to the nearest spare part/hardware shop to buy the necessary stuff..I followed all the steps given by u...unfortunately, during installing all those nuts, hose, sensors,etc, I figure out that the smaller rubber O ring left...I immediately look again at ur DIY and there are two types of rubber O ring...I really thought that smaller O ring is the new one that u want to replace...please advice me the exact location of the small rubber O ring...huhu...
Thanks Punk for replying. CNY holiday mood no time to logon!

great share. Hopefully alza's tb is same like myvi. what's the result if I messed up the hoses?
Alza's TB is very similar to Myvi. Not exactly the same but very close. Just make sure you take it out the exact way you put it in. Wrongly placed hoses might get your vacuum messed up. But most of the time everything is unique and isn't interchangeable so you should be ok. Take a picture before you do the DIY and refer to the picture if in doubt.

thx bro...I did the TB cleaning process yesterday night..thats why I couldnt notice the smaller o-ring...
Aiya.. first time do something never do it at night. You'll miss alot if you don't see properly. Only thing you should ever do the first time at night is the thing you do with your girlfriend.. in your room.. with Barry White playing in the background. :biggrin:
 
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