Home Menu

Site Navigation


Toyota 4Runner Forum - Largest 4Runner Forum > > > Normal Fuel trim readings?
User Tag List

Reply
Page 2 of 2 1 2
 
Thread Tools Rate Thread Display Modes
Old 09-17-2019, 10:50 PM #16
jross20's Avatar
jross20 jross20 is offline
Senior Member
  
Join Date: Jun 2019
Location: Georgia
Posts: 1,328
jross20 is a jewel in the rough jross20 is a jewel in the rough jross20 is a jewel in the rough
jross20 jross20 is offline
Senior Member
jross20's Avatar
 
Join Date: Jun 2019
Location: Georgia
Posts: 1,328
jross20 is a jewel in the rough jross20 is a jewel in the rough jross20 is a jewel in the rough
Quote:
Originally Posted by 19963.4lsr5 View Post
Can you just use the gauge instead of the graph? If so does it act the same?

What are the lower numbers? It that a 10 second graph?

Can you put TPS in there? And B1S1 O2 sensor voltage.

Anything above around 15% or below -15% should code for too rich or too lean.


Sent from my iPhone using Tapatalk
I'm not sure, it was the default. I'll change them to gauges and test tomorrow. Sorry I've never monitored fuel trim before, haha.

Quote:
Originally Posted by gamefreakgc View Post
Yeah, if you could change it to a gauge. Maybe the graph is showing a percentage of max, not the actual reading. Your cruising fuel trims look normal at 45 MPH.

Your engine runs a bit hot, but maybe that's just a fluke thing or was during stop and go driving?
Yeah someone had mentioned that, the heat. She usually will top out around 203-205 on non-stop drives. Never seen her go over that even in traffic. I guess I need to get a new thermostat.

I'll swap to gauges in the morning and post some tests!
Last edited by jross20; 09-18-2019 at 01:03 AM.
jross20 is offline   Reply With QuoteReply With Quote
Old 09-18-2019, 01:09 PM #17
phattyduck phattyduck is offline
Elite Member
  
Join Date: Mar 2016
Location: Pasadena, CA
Posts: 5,417
phattyduck has a reputation beyond repute phattyduck has a reputation beyond repute phattyduck has a reputation beyond repute phattyduck has a reputation beyond repute phattyduck has a reputation beyond repute phattyduck has a reputation beyond repute phattyduck has a reputation beyond repute phattyduck has a reputation beyond repute phattyduck has a reputation beyond repute phattyduck has a reputation beyond repute phattyduck has a reputation beyond repute
phattyduck phattyduck is offline
Elite Member
 
Join Date: Mar 2016
Location: Pasadena, CA
Posts: 5,417
phattyduck has a reputation beyond repute phattyduck has a reputation beyond repute phattyduck has a reputation beyond repute phattyduck has a reputation beyond repute phattyduck has a reputation beyond repute phattyduck has a reputation beyond repute phattyduck has a reputation beyond repute phattyduck has a reputation beyond repute phattyduck has a reputation beyond repute phattyduck has a reputation beyond repute phattyduck has a reputation beyond repute
Quote:
Originally Posted by jross20 View Post
Yeah someone had mentioned that, the heat. She usually will top out around 203-205 on non-stop drives. Never seen her go over that even in traffic. I guess I need to get a new thermostat.
The same thermostat installed correctly (jiggle valve down) will probably get the temps rock solid at 190*F +/- about 3*F. If you do replace it, get an OEM thermostat, they are MUCH more reliable.

Based on those screenshots, I almost think your OBD reader is just getting bunk data points. The trims, when not spiking, are perfectly fine.

-Charlie
__________________
'99 4Runner SR5 Auto - 4WD swapped
'89 Camry Alltrac LE 3S-GTE 5spd
'17 Chevy Volt Premier
'16 Honda Odyssey Elite
Previous: '88 Camry Alltrac LE 3S-GE BEAMS, 90 Camry 3S-GTE, 90 Camry DX, '03 WRX wagon, '08 Outback XT
phattyduck is offline   Reply With QuoteReply With Quote
Old 09-18-2019, 04:00 PM #18
jross20's Avatar
jross20 jross20 is offline
Senior Member
  
Join Date: Jun 2019
Location: Georgia
Posts: 1,328
jross20 is a jewel in the rough jross20 is a jewel in the rough jross20 is a jewel in the rough
jross20 jross20 is offline
Senior Member
jross20's Avatar
 
Join Date: Jun 2019
Location: Georgia
Posts: 1,328
jross20 is a jewel in the rough jross20 is a jewel in the rough jross20 is a jewel in the rough
Quote:
Originally Posted by phattyduck View Post
The same thermostat installed correctly (jiggle valve down) will probably get the temps rock solid at 190*F +/- about 3*F. If you do replace it, get an OEM thermostat, they are MUCH more reliable.

Based on those screenshots, I almost think your OBD reader is just getting bunk data points. The trims, when not spiking, are perfectly fine.

-Charlie
Oh I only get Japanese parts for my Japanese girl, (except for aftermarket suspension stuff).

Here are some new screen shots. If the trim is fine... Do we have any other ideas about the random loss of power?
Attached Images
Normal Fuel trim readings?-screenshot_20190918-094439-jpg  Normal Fuel trim readings?-screenshot_20190918-094502-jpg 
jross20 is offline   Reply With QuoteReply With Quote
Old 09-18-2019, 04:01 PM #19
jross20's Avatar
jross20 jross20 is offline
Senior Member
  
Join Date: Jun 2019
Location: Georgia
Posts: 1,328
jross20 is a jewel in the rough jross20 is a jewel in the rough jross20 is a jewel in the rough
jross20 jross20 is offline
Senior Member
jross20's Avatar
 
Join Date: Jun 2019
Location: Georgia
Posts: 1,328
jross20 is a jewel in the rough jross20 is a jewel in the rough jross20 is a jewel in the rough
One more
Attached Images
Normal Fuel trim readings?-screenshot_20190918-094545-jpg 
jross20 is offline   Reply With QuoteReply With Quote
Old 09-18-2019, 07:08 PM #20
gamefreakgc's Avatar
gamefreakgc gamefreakgc is offline
Elite Member
  
Join Date: Oct 2014
Location: Citrus Heights, California
Age: 36
Posts: 7,338
Real Name: Jerod
gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future
gamefreakgc gamefreakgc is offline
Elite Member
gamefreakgc's Avatar
 
Join Date: Oct 2014
Location: Citrus Heights, California
Age: 36
Posts: 7,338
Real Name: Jerod
gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future
Other than Torque or your reader is giving you bogus values (engine temp of ~430 degrees?!?) nothing is out of the ordinary there. It's probably a sensor that's gone bad. If you can get a hold of the factory service manual that floats around here in digital form there are test procedures for each major sensor that controls fuel or timing such as the MAF, O2 sensors, and TPS. That's where I would start.
__________________
'98 4Runner SR5 - 4x4 JDM 5VZ-FE Supercharged - 249K miles.
326WHP 347TQ

AEM F/IC 6, 11 PSI, 3" Intake and 3" Exhaust
Jerod's Supercharged T[u]RD Build
gamefreakgc is offline   Reply With QuoteReply With Quote
Old 09-19-2019, 01:07 AM #21
jross20's Avatar
jross20 jross20 is offline
Senior Member
  
Join Date: Jun 2019
Location: Georgia
Posts: 1,328
jross20 is a jewel in the rough jross20 is a jewel in the rough jross20 is a jewel in the rough
jross20 jross20 is offline
Senior Member
jross20's Avatar
 
Join Date: Jun 2019
Location: Georgia
Posts: 1,328
jross20 is a jewel in the rough jross20 is a jewel in the rough jross20 is a jewel in the rough
Quote:
Originally Posted by gamefreakgc View Post
Other than Torque or your reader is giving you bogus values (engine temp of ~430 degrees?!?) nothing is out of the ordinary there. It's probably a sensor that's gone bad. If you can get a hold of the factory service manual that floats around here in digital form there are test procedures for each major sensor that controls fuel or timing such as the MAF, O2 sensors, and TPS. That's where I would start.
Yeah sometimes things go crazy and then go back to normal. It only does this on the 4runner. Haha..

I believe I have a copy of that manual, are you referring to resistance testing? Sounds like a good thing to get my electrician pal to look at me with and have some beers over.

Well I'm glad she looks okay to you guys and I appreciate the help. The mysterious search for the lack of power fix continues!
jross20 is offline   Reply With QuoteReply With Quote
Reply
Page 2 of 2 1 2

Tags
absurdly , acceleration , fuel , normal , trim

« Previous Thread | Next Thread »

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 On
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Fuel Trim Readings (ScanGauge) psraff 3rd gen T4Rs 10 04-28-2018 09:43 PM
Short term fuel trim specs GangsterOfLove 3rd gen T4Rs 4 08-16-2016 08:43 AM
Think I have my worse-than-normal fuel mileage licked Nuke 4th Gen T4Rs 3 05-05-2014 07:48 PM
Rough upper dash trim normal or defective? trdsport253 5th gen T4Rs 23 10-06-2013 11:13 PM
Fuel Injector ohm readings quick question geo77 3rd gen T4Rs 2 03-18-2011 01:04 PM

» Follow Us!!!
» Log in
User Name:

Password:

Not a member yet?
Register Now!
Powered by vBadvanced CMPS v3.2.2

All times are GMT -4. The time now is 04:52 PM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2024 DragonByte Technologies Ltd.
Feedback Buttons provided by Advanced Post Thanks / Like (Lite) - vBulletin Mods & Addons Copyright © 2024 DragonByte Technologies Ltd.
User Alert System provided by Advanced User Tagging (Lite) - vBulletin Mods & Addons Copyright © 2024 DragonByte Technologies Ltd.
***This site is an unofficial Toyota site, and is not officially endorsed, supported, authorized by or affiliated with Toyota. All company, product, or service names references in this web site are used for identification purposes only and may be trademarks of their respective owners. The Toyota name, marks, designs and logos, as well as Toyota model names, are registered trademarks of Toyota Motor Corporation***Ad Management plugin by RedTyger
 
Toyota - 4Runner . org Forum Terms and Privacy Policy
Copyright © 2020