Go Back   Club Lexus Forums > Lexus Model Forums > GS Models > GS - Second Generation
Sign in using an external account
Register Forgot Password?

MAF Sensor and Throttle Body Cleaning DIY: GS400 & GS430

Reply
 
 
 
 
Thread Tools Search this Thread Display Modes
Old 04-11-08, 05:36 PM   #16
UDel
Lexus Champion
Trader Score: (0)
 
Join Date: Feb 2005
Location: ------
Posts: 4,236
Default

I cleaned my throttle body today and it went alot better then the first time I tried it. Taking the intake tract off to get at the throttle body was extremely difficult, I was turning it and pulling really hard and it would barely budge. For some reason the lower right portion just did not want to come off. After putting alot of muscle into it and wriggling it the thing eventually came off. There is a raised lip area on the right hand side of the metal tb tube that it was I guess being caught on making it extremely difficult to come off. My TB was pretty dirty and took a little while to clean but I got what I could. I put a little motor oil at the ends of the black tube where that controls the throttle opening to make sure it was properly lubricated and put everything back together. When I started my car I noticed the idle was pretty high and I had to actually hit the brakes harder when backing out of the driveway because it was going in reverse pretty fast. The car was idling pretty high which was to be expected and I did not throw any CEL codes, throttle seemed a little more responsive but I just drove around my neighborhood kind of slowly. Hopefully this helps with the low/rough idle and it would be nice if my gas mileage improved a little as well as the throttle being a little more responsive. The DIY helped me out so thanks everyone for posting them.
This ad is not displayed to registered members.
Register your free account today and become a member on Club Lexus!
__________________
-----------------------------------------------------------------------------------------------
UDel is offline   Reply With Quote
Old 07-24-08, 10:33 PM   #17
zacky
Driver School Candidate
Trader Score: (0)
 
Join Date: Mar 2008
Location: ny
Posts: 16
Default Maf,clean it or get a new one?

Hi, is there a difference between cleaning the maf and getting a new one? The mechanic told me that I need a new Maf, after he cleaned it. To fix my lag and loss of power problem when I push gas in town.
zacky is offline   Reply With Quote
Old 07-25-08, 05:47 AM   #18
Lexmex
Super Moderator
Trader Score: (0)
 
Lexmex's Avatar
 
Join Date: Apr 2004
Location: Miami, Florida
Posts: 16,382
Default

Quote:
Originally Posted by zacky View Post
Hi, is there a difference between cleaning the maf and getting a new one? The mechanic told me that I need a new Maf, after he cleaned it. To fix my lag and loss of power problem when I push gas in town.
Are you getting a check engine light?
__________________
Homepage of my 1999 RX300 AWD
Lexmex is offline   Reply With Quote
Old 07-25-08, 05:27 PM   #19
zacky
Driver School Candidate
Trader Score: (0)
 
Join Date: Mar 2008
Location: ny
Posts: 16
Default

No, I am not getting a check engine light. The mechanic cleaned the maf, but then said it's still no good. That a new MAF is needed to work properly. I'm not sure if I should buy a new one now.

Also, If I install a new MAF, what else needs to be done relating to the ECU? does it need to be programmed at the shop?
zacky is offline   Reply With Quote
Old 07-27-08, 09:01 PM   #20
zacky
Driver School Candidate
Trader Score: (0)
 
Join Date: Mar 2008
Location: ny
Posts: 16
Default

I cleaned my throttle body today. Took out the whole piece and noticed that most of the dirty carbon build up was actually in the back end of the throttle body. So I recommend taking the whole piece out. Its not hard. This was my first time fixing anything in my car for I am a rookie. Got a few burn marks and scratches on my hands from the hot engine. Although, I am glad I did it.
Thank you Club lexus.
zacky is offline   Reply With Quote
Old 09-14-08, 11:57 PM   #21
SeattleGS400
Lead Lap
Trader Score: (1)
 
Join Date: Jul 2003
Location: Idaho
Posts: 716
Default Other things to try: PEA-contaning Fuel System Cleaners

UPDATE: While the MAF and throttle body cleaning seemed to improve the throttle response, I believe that cleaning the dirty fuel injectors, valves, and combustion chambers with a PEA-containing fuel system cleaner (like Chevron Techron Concentrate, Gumout Regane, Redline SI-i, or Amsoil Performance Improver) is a more thorough solution. Dirty fuel injectors, valves, and combustion chambers can lead to power loss, hesitation, sluggish acceleration as noted above. Cleaning these engine parts with either of these aforemetioned products is worth a try (<$20). My thoughts:

http://www.clublexus.com/forums/show....php?p=3837549
SeattleGS400 is offline   Reply With Quote
Old 09-30-08, 12:03 AM   #22
swat1727
Lexus Test Driver
Trader Score: (2)
 
Join Date: Oct 2007
Location: California
Posts: 930
Default

Quote:
Originally Posted by zacky View Post
I cleaned my throttle body today. Took out the whole piece and noticed that most of the dirty carbon build up was actually in the back end of the throttle body. So I recommend taking the whole piece out. Its not hard. This was my first time fixing anything in my car for I am a rookie. Got a few burn marks and scratches on my hands from the hot engine. Although, I am glad I did it.
Thank you Club lexus.

are you able to change the spark plugs after taking the whole throttle body out? or do u need to take off more stuff in order to reach the middle spark plugs?
swat1727 is offline   Reply With Quote
Old 09-30-08, 11:13 PM   #23
GS4_Fiend
Lexus Fanatic
Trader Score: (20)
 
GS4_Fiend's Avatar
 
Join Date: Aug 2008
Location: CA
Posts: 6,648
Default

You can not clean the throttle body if it is equipped with a Throttle by wire type (the throttle without cables) because its electronic.
GS4_Fiend is offline   Reply With Quote
Old 10-01-08, 05:28 PM   #24
MrG4Life
Lexus Champion
Trader Score: (14)
 
MrG4Life's Avatar
 
Join Date: Jun 2006
Location: DE <---> NY
Posts: 3,276
@MrG4Life
Send a message via AIM to MrG4Life
Default

Quote:
Originally Posted by SeattleGS400 View Post
UPDATE: While the MAF and throttle body cleaning seemed to improve the throttle response, I believe that cleaning the dirty fuel injectors, valves, and combustion chambers with a PEA-containing fuel system cleaner (like Chevron Techron Concentrate, Gumout Regane, Redline SI-i, or Amsoil Performance Improver) is a more thorough solution. Dirty fuel injectors, valves, and combustion chambers can lead to power loss, hesitation, sluggish acceleration as noted above. Cleaning these engine parts with either of these aforemetioned products is worth a try (<$20). My thoughts:

http://www.clublexus.com/forums/show....php?p=3837549
Good write-up. I was just reading posts about the oil used on K&N filters getting on the MAF sensor. Mine seems to be good but I don't think it'll kill to spend some time to get the sensor and throttle body cleaned
__________________

2004 Black Onyx GS300
“Success is there for those who want it, plan for it and take action to achieve it.” - Jim Brown
Quote:
Originally Posted by 97-SC300 View Post
The 2GS is still the sexiest GS ever made. The other generations are all nice as well....but 2GS is king IMO.
MrG4Life is offline   Reply With Quote
Old 10-02-08, 08:25 AM   #25
VALET dude
Driver
Trader Score: (2)
 
VALET dude's Avatar
 
Join Date: Aug 2008
Location: Las Vegas
Posts: 197
Send a message via AIM to VALET dude
Default

i highly recommend this if you havent done it in a long time. i just did mine, and boy oh boy what a difference. there was no hesitation nor felt laggy from stop signs or stop lights. it felt so good driving on the freeway too
VALET dude is offline   Reply With Quote
Old 10-10-08, 04:02 PM   #26
FreddyEarl
Rookie
Trader Score: (0)
 
Join Date: Sep 2008
Location: DC
Posts: 67
Default

3M makes a awesome intake system cleaning kit. The intake manifold looks almost brand new on the inside when it's done. Doing oil and filter changes on time will lower the amount of crude around the Throttle Body. It's even better if you stick with synthetic.
__________________
1993 SC400 2JZ-GTE equipped,Daizen upper and lower control arm bushings,Daizen powersteering rack bushings,Daizen swaybar kit,Tanabe NF210 Springs,HP Tokico struts,Custom air intake system,FMIC,upgrades coming soon!
FreddyEarl is offline   Reply With Quote
Old 09-12-09, 04:42 PM   #27
Debonair
iModerate
Trader Score: (0)
 
Debonair's Avatar
 
Join Date: May 2007
Location: 408 NOR CAL
Posts: 3,083
Default

Nice write up SeattleGS400

In the last month or so my idle has got to be very erratic. Today I pulled all my plugs, cleaned them, and checked the gaps. I cleaned the throttle body. And I cleaned the MAF. The whole time my battery was disconnected so I can also say I also reset the ECU. BIG DIFFERENCE in the way the car is now idling. Much smoother. Simple job with good results.

I used:

CRC MAF Cleaner
CRC Throttle Body Cleaner
CRC Electrical Component Cleaner

-----

Quote:
Originally Posted by GS4_Fiend View Post
You can not clean the throttle body if it is equipped with a Throttle by wire type (the throttle without cables) because its electronic.
I assume you mean you can not clean the linkage on a Drive-by-wire setup which is true because there is none. But you definitely CAN clean the actual throttle body intake port and blade.
__________________

“Everyone is entitled to his own opinion, but not to his own facts.”― Daniel Patrick Moynihan
Debonair is online now   Reply With Quote
Old 09-13-09, 01:13 PM   #28
Lexscme
Pole Position
Trader Score: (0)
 
Lexscme's Avatar
 
Join Date: Aug 2009
Location: AZ
Posts: 236
Default

any pics of the MAF being cleaned?? i need to know how to clean mine.
__________________
Project Black Beast SC400 comin soon...
Lexscme is offline   Reply With Quote
Old 09-14-09, 06:58 AM   #29
Debonair
iModerate
Trader Score: (0)
 
Debonair's Avatar
 
Join Date: May 2007
Location: 408 NOR CAL
Posts: 3,083
Default

Quote:
Originally Posted by Lexscme View Post
any pics of the MAF being cleaned?? i need to know how to clean mine.
Here is a pic of a Corolla MAF from Toyotanation.com. It looks EXACTLY like the one in my car.

Click the image to open in full size.

You can clean both the air temp sensor (green) and MAF (red).
__________________

“Everyone is entitled to his own opinion, but not to his own facts.”― Daniel Patrick Moynihan
Debonair is online now   Reply With Quote
Old 09-14-09, 01:43 PM   #30
Lexscme
Pole Position
Trader Score: (0)
 
Lexscme's Avatar
 
Join Date: Aug 2009
Location: AZ
Posts: 236
Default

do spray on the screens,not on the sensor. right?
__________________
Project Black Beast SC400 comin soon...
Lexscme is offline   Reply With Quote
Old 09-14-09, 01:43 PM
 
 
 
 
Reply

Tags
2003, air, body, clean, cleaner, es300, evaporation, flow, gs400, intake, lexus, maf, mass, sensor, system, taking, throttle

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
DIY- (MAF) Mass Air Flow Sensor Cleaning hypervish RX - First Generation 27 07-09-14 06:13 AM
crc maf cleaner-any negative experiences? gstreee GS - Third Generation 8 03-06-14 04:56 PM
Just cleaned my MAF... Lavrishevo LS400 4 06-03-13 05:04 PM
Throttle body + MAF cleaning StanVanDam LS430 10 04-26-13 10:08 AM
A couple things in regards to MAF/TB Cleaning... MValentine LS400 10 02-04-13 07:41 PM

All times are GMT -7. The time now is 07:23 AM.

Join ClubLexus
Advertising


Copyright © 2000-2008 Internet Brands, Inc. All Rights Reserved
Privacy Policy | Disclaimer | Terms of Use | JOBS


Get all contact info