Lean WOT - good at half throttle (Boosted) - Page 7 - Toyota Tacoma Forum
User Tag List

Reply
 
Thread Tools Display Modes
#61 (permalink) Old 01-07-2013, 03:52 PM
cold eh
 
flatboy's Avatar
 
Join Date: Jan 2005
Location: Edmonton, Alberta, CANADA!
Posts: 3,801
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Re: Lean WOT - good at half throttle (Boosted)

On the scan gauge I know my 2000 4 runner with the 3.4L won't read A/F but I haven't tried my taco as its still winter here.

BOOST BRIGADE
Friends don't let friends drive stock.
2000 Tacoma @15psi, (13.8@100mph @ 9psi)
2000 4 Runner @7 psi rear mount
flatboy is offline  
Sponsored Links
Advertisement
 
#62 (permalink) Old 05-19-2014, 06:27 AM
Newbie
 
Join Date: Sep 2013
Location: Griffin GA
Posts: 2
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Re: Lean WOT - good at half throttle (Boosted)

ok thread jack everyone...ive got a similar problem. boosted 2rz on 15lbs with 450cc injectors 255 fuel pump. Driving around at low throttle is fine but as soon as i try WOT right at 3k rpms it leans out like crazy and sputters terribly....is this an o2 sensor problem? i have no obd2 port to check with so any way to check with a multimeter would be helpful....thanks in advanvce
crijonRa29 is offline  
#63 (permalink) Old 05-19-2014, 06:35 AM
Tacoholic
 
toycoma98's Avatar
 
Join Date: Jun 2006
Location: Yigo Guam
Posts: 2,621
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Re: Lean WOT - good at half throttle (Boosted)

Quote:
Originally Posted by crijonRa29 View Post
ok thread jack everyone...ive got a similar problem. boosted 2rz on 15lbs with 450cc injectors 255 fuel pump. Driving around at low throttle is fine but as soon as i try WOT right at 3k rpms it leans out like crazy and sputters terribly....is this an o2 sensor problem? i have no obd2 port to check with so any way to check with a multimeter would be helpful....thanks in advanvce
its probably still in closed loop when you're WOT boost.. I use a URD o2 calibrator in my setup.
toycoma98 is offline  
#64 (permalink) Old 05-19-2014, 07:01 AM
Newbie
 
Join Date: Sep 2013
Location: Griffin GA
Posts: 2
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
So is it an o2 problem
crijonRa29 is offline  
#65 (permalink) Old 05-19-2014, 11:10 PM
Grand Tacoholic
 
blackedout_taco_stidham's Avatar
 
Join Date: Feb 2008
Location: YOUESSAYY
Posts: 3,610
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
(Thread Starter)
Re: Lean WOT - good at half throttle (Boosted)

i think it has something to do with the factory ECM not kicking into open loop fast enough. Mine does it too. So i tend roll into it more than just punch it...kinda sucks, but ill be installing the AEM FIC soon, along with 1000cc injectors...so hopefully no more lean conditions for me.

I like Toyotas.
blackedout_taco_stidham is offline  
#66 (permalink) Old 05-20-2014, 04:00 AM
Enthusiast
 
lastresort's Avatar
 
Join Date: Jun 2013
Posts: 129
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 8 Post(s)
Re: Lean WOT - good at half throttle (Boosted)

When the ecu is in closed loop it is maintaining the afr closely based on the input from the o2 sensor. If you add some sort of piggy back you can alter the o2 signal and in effect trick the ecu to add fuel. When the ecu goes into open loop it no longer cares about the o2 signal and if your running larger injectors your afrs are often adequate.

BOOSTED 2RZ
W58 w/Stage 4 clutch and Fidanza flywheel
Ford 8.8 3.73 LSD with discs and parking brake in process
lastresort is offline  
#67 (permalink) Old 05-20-2014, 06:08 AM
Tacoholic
 
toycoma98's Avatar
 
Join Date: Jun 2006
Location: Yigo Guam
Posts: 2,621
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Re: Lean WOT - good at half throttle (Boosted)

Quote:
Originally Posted by lastresort View Post
When the ecu is in closed loop it is maintaining the afr closely based on the input from the o2 sensor. If you add some sort of piggy back you can alter the o2 signal and in effect trick the ecu to add fuel. When the ecu goes into open loop it no longer cares about the o2 signal and if your running larger injectors your afrs are often adequate.

But it wont "ADD" fuel, more like allowing fuel to be added by maf signal naturally without o2 signal (closed loop), or a piggyback to increase voltage to the maf sensor making AFR richer.

Last edited by toycoma98; 05-20-2014 at 06:12 AM.
toycoma98 is offline  
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Toyota Tacoma Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



  Similar Threads
Thread Thread Starter Forum Replies Last Post
two issues lofting lean condition at 1/4 throttle and 4x4 actuator mark2002double Performance 5 12-29-2005 07:05 PM
throttle body opening half way troymm Performance 10 06-13-2005 05:38 AM
Half red half clear tailights for 98 4x4 PGD55 Lights / Exterior Electricals 9 11-02-2003 03:41 PM
does the throttle cable trick work good? life Performance 3 09-13-2003 06:27 PM
SR: 'Taco Lean' (Noticeable 'Lean' / 'Tilt' to One Side) hschen S-Runner Talk 5 10-01-2002 09:17 AM

Posting Rules  
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are Off

 
For the best viewing experience please update your browser to Google Chrome