Previous Thread
Next Thread
New Reply
Print Thread
Rate Thread
Intake, Throttle Body - How To Clean #136588 Mar 27, 1:05pm Mar 27, 1:05pm
Joined: Oct 2003
Posts: 1,226
New Jersey
H
hephaestus OP
Specialist
hephaestus OP
H
Specialist

Joined: Oct 2003
Posts: 1,226
New Jersey
Intake, Throttle Body - How To Clean
Cleaning The Throttle Body For Better Engine Performance
By hephaestus


Why clean it?
Why do I want to clean my throttle body you ask? What is my throttle body? The throttle body is the piece that the air Intake tube hooks up to. It contains the throttle control plate that opens to control the amount of air flowing into the engine. You should clean this out periodically because carbon will build up inside of it causing a poor idle and sluggish Performance. It is fairly easy to clean, so you should do it. You will probably find it coated with black junk, and will notice a considerable difference afterwords. Every car can benefit by having the throttle body cleaned, especially if your car is idling bad, stalling or lacking power.

The throttle body on a Toyota fuel-injected engine contains a butterfly valve which opens to allow air into the Intake chamber atop the engine when the throttle is open. The throttle body is fed from the air Intake, and after years of use, the particles which get past the Air Filter can impede airflow, cause idle to drop, or affect the opening and closing of the valve. It's a good idea to clean the throttle body at the first sign of Performance or mileage decreases, and as semi-regular maintenance: I clean mine at every 30,000 mile service.


Tools needed
[*] 8mm or 10mm socket wench depending on if you have stock airbox or an aftermarket air Intake system

How to do it
Before you do anything you will want to start the car up and let it get to operating temperature so the dirt in the throttle body will come loose.

Now, what can we use to clean the throttle body? Most carburetor and choke cleaners are pretty strong. The same is true of cleaners that are sprayed into the air Intake for combustion chamber cleaning. They have to be strong in order to be able to clean things without mechanical means such as scrubbing with a brush. Sprays cannot clean all areas, particularly the back of the throttle plate. In addition it is almost impossible to see which areas have been cleaned and which haven't.

Linked Image

Can of Throttle Body/Fuel Injector Cleaner.



Linked Image

With your Celica turned off, unscrew three bolts to maneuver the Air Intake enough so you have room to work.

Linked Image

The little rectangle slit in throttle body is where to shot for. It takes some more maneuvering. Pull back the hose covering the throttle body just enough to get the straw in.

Hold onto the little straw to keep it from flying into your engine!

Still, with your Celica off, liberally apply EFI or carb cleaner to the throttle body. Be sure to open the valve to allow the cleaner to work around the valve, and to get some inside the throttle body. (The Toyota FSM specifies carb cleaner for this procedure.)

Spray the little slit and the whole throttle body afterwords.

WARNING: Avoid getting any carb-cleaner on the plastics or rubber parts. Keep a clean rag handy, to quickly wipe down any excess spray. Also avoid spraying your MAF sensor. You should only spray in to the throttle body, not the intake/air-box or towards it.

Linked Image


See the little hole right side. It is located on bottom of throttle body near left center.

Linked Image

Now put everything back together and start her up. It probably won't start right up as it usually does, so don't get nervous. You may notice some white smoke pouring out of your tailpipe; this is normal it will go away once you let the car run for a few minutes and you're done. The white smoke is what is left of the cleaner from doing it's job of removing all the gunk from your engine.

After cleaning I noticed my car doesn't dip down to 200 RPMs or close stall anymore at a stop. In fact I had to re-adjust the throttle cable because I was now idling at 1000 RPMs or a little over from when I tightened the throttle cable some time ago.

This procedure should probably be done once a year as part of your spring tune-up ritual.

Re: Intake, Throttle Body - How To Clean [Re: hephaestus] #136589 Sep 13, 12:09pm Sep 13, 12:09pm
Joined: Sep 2004
Posts: 245
St. Paul, Minnesota
sxyimports125
Member
2001 Toyota Celica GT
sxyimports125
Member
2001 Toyota Celica GT

Joined: Sep 2004
Posts: 245
St. Paul, Minnesota
Do you do it while your car is running? Yes or no? I've been reading other peoples point of views on the issue and some say no and some say yes, which is it? confused

Re: Intake, Throttle Body - How To Clean [Re: sxyimports125] #136590 Oct 29, 11:11am Oct 29, 11:11am
Joined: Aug 2003
Posts: 4,278
Pomona, CA
Virgilson
TheFilipinoCrew
2000 Toyota Celica GT
Virgilson
TheFilipinoCrew
2000 Toyota Celica GT

Joined: Aug 2003
Posts: 4,278
Pomona, CA
just cleaned my throttle body works idles great now!!! thumbsup

Re: Intake, Throttle Body - How To Clean [Re: hephaestus] #136591 Nov 2, 7:41pm Nov 2, 7:41pm
Joined: Aug 2004
Posts: 100
SoCaL
2001 Silver Toyota Celica GT
hefner
Member
2001 Toyota Celica GT
hefner
2001 Silver Toyota Celica GT
Member
2001 Toyota Celica GT

Joined: Aug 2004
Posts: 100
SoCaL
yea do you do it when your engine is running or when its not????

Re: Intake, Throttle Body - How To Clean [Re: hefner] #136592 Nov 7, 3:50pm Nov 7, 3:50pm
Joined: Oct 2004
Posts: 18
NC
2000 nighthawk black pear Toyota Celica
gtsdohcvvtli
Member
2000 Toyota Celica
gtsdohcvvtli
2000 nighthawk black pear Toyota Celica
Member
2000 Toyota Celica

Joined: Oct 2004
Posts: 18
NC
Guys guys guys, you know you should NOT do it while its running, think of the MAF sensor. If its not reading air flow its gonna stall.

Re: Intake, Throttle Body - How To Clean [Re: hephaestus] #449569 Sep 3, 2:32pm Sep 3, 2:32pm
Joined: Sep 2013
Posts: 3
USA
0
02gtowner
New Member
02gtowner
0
New Member

Joined: Sep 2013
Posts: 3
USA
How do you clean it running? My 02 will NOT run with hose off, to access tb. I dont advise it, if you can due to maf sensor damage.

Re: Intake, Throttle Body - How To Clean [Re: hephaestus] #449573 Sep 4, 9:41pm Sep 4, 9:41pm
Joined: May 2002
Posts: 464
California
CaffeineKid
CelicaSpecialist
2008 Scion tC
CaffeineKid
CelicaSpecialist
2008 Scion tC

Joined: May 2002
Posts: 464
California
I've updated the OP with additional information, to answer the previous questions.

Join the conversation - Register Now or Log In to add your comment


Moderated by  isaac 

Member Spotlight
GTStick
GTStick
2000 Toyota Celica
New York

Posts: 416
Joined: September 2003
Show All Member Profiles 
Recent Topics
wrong key ring
by ljvt2669. 11/23/2017 4:06 AM
Help! New celica owner
by Papito07. 11/18/2017 8:25 PM
WTB: Celica Project
by Excel. 11/18/2017 9:15 AM
Low idle and slow take off
by Wmillerjr. 11/17/2017 9:34 AM
WTB: OEM Floor Mats
by Mac_TheBeard. 11/16/2017 11:06 PM
Smoking after cleaning injectors
by CelicaSW88. 11/15/2017 11:03 AM
What Tail light is this?
by Hanate. 11/14/2017 7:37 PM
2001 Celica VVTI 140 Wheel Studs
by minos316. 11/11/2017 4:06 PM
Customize Your Toyota Celica Privacy Policy · About · Contact
Privacy Policy · About · Contact
CelicaHobby.com is an independent Toyota Celica enthusiast website. CelicaHobby.com is not sponsored by or affiliated with Toyota Motor Sales, USA, Inc. in any way. The Toyota and Celica names and logos are trademarks owned by Toyota Motor Sales, USA, Inc.
© CelicaHobby.com, 2001-2017
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Snapshot build 20171122)