Home Menu

Site Navigation


Toyota 4Runner Forum - Largest 4Runner Forum > > > Low/Random Idling after Torque Valve Cover
User Tag List

Reply
 
Thread Tools Rate Thread Display Modes
Old 03-02-2019, 12:21 AM #1
EveningCommuter EveningCommuter is offline
Member
  
Join Date: Dec 2018
Location: San Bernardino
Posts: 111
EveningCommuter is on a distinguished road
EveningCommuter EveningCommuter is offline
Member
 
Join Date: Dec 2018
Location: San Bernardino
Posts: 111
EveningCommuter is on a distinguished road
Low/Random Idling after Torque Valve Cover
So my 97 has been burning oil, I traced the drips and where the leak is and it has been falling onto the exhaust for the last month or so and I finally decided to torque the valve cover as a temporary fix.

I went ahead and torqued all the bolts to 53 inch pounds to about 4.4 foot pounds.

After torquing I began to get a whine in the engine bay, I get a 800 - 1000 RPM idling and it drops. It fluctuates and goes up to a high idle then drops down again.

Anywhere to start or check? All I did was loosen and torque.

Edit: I just went ahead and loosened/re-torqued again. I still hear a whine, I watch the RPM's and it goes from 1000, throttles up, drops down to 800 and even 500. Wtf is going on.
Last edited by EveningCommuter; 03-02-2019 at 01:24 AM.
EveningCommuter is offline   Reply With QuoteReply With Quote
Old 03-02-2019, 01:20 AM #2
calimobber's Avatar
calimobber calimobber is offline
Member
  
Join Date: Apr 2011
Location: Death Valley
Posts: 591
calimobber will become famous soon enough
calimobber calimobber is offline
Member
calimobber's Avatar
 
Join Date: Apr 2011
Location: Death Valley
Posts: 591
calimobber will become famous soon enough
I doubt the wine is related to your torquing the bolts. My guess is you noticed it since you are looking into the engine.

My alternator tends to whine louder when the battery is low since its under high load...Just a guess.
__________________
My 2002 4runner Build : http://www.toyota-4runner.org/3rd-ge...r-project.html
calimobber is offline   Reply With QuoteReply With Quote
Old 03-02-2019, 01:36 AM #3
EveningCommuter EveningCommuter is offline
Member
  
Join Date: Dec 2018
Location: San Bernardino
Posts: 111
EveningCommuter is on a distinguished road
EveningCommuter EveningCommuter is offline
Member
 
Join Date: Dec 2018
Location: San Bernardino
Posts: 111
EveningCommuter is on a distinguished road
Could be unrelated. Only issue is that after I torqued the bolts my engine idle drops and raises. It use to stick at 1k but now it goes 800, 500, back to 1k and so on.

Wtf did I do.
Last edited by EveningCommuter; 03-02-2019 at 02:19 AM.
EveningCommuter is offline   Reply With QuoteReply With Quote
Old 03-02-2019, 02:19 AM #4
EveningCommuter EveningCommuter is offline
Member
  
Join Date: Dec 2018
Location: San Bernardino
Posts: 111
EveningCommuter is on a distinguished road
EveningCommuter EveningCommuter is offline
Member
 
Join Date: Dec 2018
Location: San Bernardino
Posts: 111
EveningCommuter is on a distinguished road
Whining has gone away, only happens on start up. Could be a belt?

RPM's is still an issue, after half a minute it drops below 1000 and then keeps going lower. I pulled the mass airflow and am going to clean it. Probably knocked something loose while torquing the covers.
EveningCommuter is offline   Reply With QuoteReply With Quote
Old 03-02-2019, 08:25 AM #5
LittleCaesar's Avatar
LittleCaesar LittleCaesar is offline
Elite Member
  
Join Date: May 2011
Location: OBX, NC and Obamaville
Posts: 6,801
LittleCaesar is just really nice LittleCaesar is just really nice LittleCaesar is just really nice LittleCaesar is just really nice
LittleCaesar LittleCaesar is offline
Elite Member
LittleCaesar's Avatar
 
Join Date: May 2011
Location: OBX, NC and Obamaville
Posts: 6,801
LittleCaesar is just really nice LittleCaesar is just really nice LittleCaesar is just really nice LittleCaesar is just really nice
Clean the idle air controller throughly. Also check for a hose that may have come loose.
LittleCaesar is offline   Reply With QuoteReply With Quote
Old 03-02-2019, 08:40 AM #6
MaineRunna's Avatar
MaineRunna MaineRunna is offline
Member
  
Join Date: Sep 2018
Location: Berwick, Maine USA
Posts: 374
Real Name: Mike
MaineRunna will become famous soon enough MaineRunna will become famous soon enough
MaineRunna MaineRunna is offline
Member
MaineRunna's Avatar
 
Join Date: Sep 2018
Location: Berwick, Maine USA
Posts: 374
Real Name: Mike
MaineRunna will become famous soon enough MaineRunna will become famous soon enough
Check for a vacuum leak. (pcv hose, vacuum lines, intake duct, etc)
MaineRunna is offline   Reply With QuoteReply With Quote
Old 03-02-2019, 09:02 AM #7
19963.4lsr5 19963.4lsr5 is offline
Elite Member
  
Join Date: Aug 2013
Location: Stouchsburg PA
Posts: 5,323
19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold
19963.4lsr5 19963.4lsr5 is offline
Elite Member
 
Join Date: Aug 2013
Location: Stouchsburg PA
Posts: 5,323
19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold
Your engine should not be idling at 1000rpm warmed up. It should be 600-700rpm. In park neutral or drive and reverse.

Let it relearn it’s idle. You sealing the valve covers by tightening them has closed off a vacuum leak via the PCV system.


Sent from my iPhone using Tapatalk
19963.4lsr5 is offline   Reply With QuoteReply With Quote
Old 03-02-2019, 01:55 PM #8
desertegal7 desertegal7 is offline
Member
  
Join Date: Nov 2014
Location: Yemen
Posts: 66
desertegal7 is on a distinguished road
desertegal7 desertegal7 is offline
Member
 
Join Date: Nov 2014
Location: Yemen
Posts: 66
desertegal7 is on a distinguished road
Check rear coolant temp sensor
i would expect that you torqued the rear bolts as well,, thus i may suspect that you pooped out the sensor connecter a bit.
desertegal7 is offline   Reply With QuoteReply With Quote
Old 03-02-2019, 07:54 PM #9
EveningCommuter EveningCommuter is offline
Member
  
Join Date: Dec 2018
Location: San Bernardino
Posts: 111
EveningCommuter is on a distinguished road
EveningCommuter EveningCommuter is offline
Member
 
Join Date: Dec 2018
Location: San Bernardino
Posts: 111
EveningCommuter is on a distinguished road
Today I cleaned my mass airflow sensor and installed it. After doing that and torquing the valve covers my engine will idle at about 700 at start up and fluctuate on warmup up to about 800 - 1000. Once warmed up the engine will stay at 700.

One thing I did notice is that I no longer idle at 1k. Another thing to is when I am at a stop and am holding the brake I drop down to 600.

600 at a stop.
600 in reverse.
700 in neutral.
700 in park at warmup.
700 - 1000 during warmup.

Does this look normal?

Edit: According to @19963.4lsr5 , Park, Neutral, Drive and Reverse. I'm good boys.

I use to Idle at 1k all the time.
Last edited by EveningCommuter; 03-02-2019 at 08:03 PM.
EveningCommuter is offline   Reply With QuoteReply With Quote
Old 03-03-2019, 01:04 AM #10
19963.4lsr5 19963.4lsr5 is offline
Elite Member
  
Join Date: Aug 2013
Location: Stouchsburg PA
Posts: 5,323
19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold
19963.4lsr5 19963.4lsr5 is offline
Elite Member
 
Join Date: Aug 2013
Location: Stouchsburg PA
Posts: 5,323
19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold
Quote:
Originally Posted by EveningCommuter View Post
Today I cleaned my mass airflow sensor and installed it. After doing that and torquing the valve covers my engine will idle at about 700 at start up and fluctuate on warmup up to about 800 - 1000. Once warmed up the engine will stay at 700.

One thing I did notice is that I no longer idle at 1k. Another thing to is when I am at a stop and am holding the brake I drop down to 600.

600 at a stop.
600 in reverse.
700 in neutral.
700 in park at warmup.
700 - 1000 during warmup.

Does this look normal?

Edit: According to @19963.4lsr5 , Park, Neutral, Drive and Reverse. I'm good boys.

I use to Idle at 1k all the time.


In my opinion those idle rpms are correct. And what I see on two different 4Runners with a 3.4 automatic.


Sent from my iPhone using Tapatalk
19963.4lsr5 is offline   Reply With QuoteReply With Quote
Old 03-03-2019, 05:04 PM #11
T4R2014's Avatar
T4R2014 T4R2014 is offline
Elite Member
  
Join Date: Jun 2011
Location: Shangrila
Posts: 5,037
T4R2014 is a splendid one to behold T4R2014 is a splendid one to behold T4R2014 is a splendid one to behold T4R2014 is a splendid one to behold T4R2014 is a splendid one to behold T4R2014 is a splendid one to behold
T4R2014 T4R2014 is offline
Elite Member
T4R2014's Avatar
 
Join Date: Jun 2011
Location: Shangrila
Posts: 5,037
T4R2014 is a splendid one to behold T4R2014 is a splendid one to behold T4R2014 is a splendid one to behold T4R2014 is a splendid one to behold T4R2014 is a splendid one to behold T4R2014 is a splendid one to behold
Sounds like you fixed your high idle.
T4R2014 is offline   Reply With QuoteReply With Quote
Old 03-03-2019, 05:41 PM #12
EveningCommuter EveningCommuter is offline
Member
  
Join Date: Dec 2018
Location: San Bernardino
Posts: 111
EveningCommuter is on a distinguished road
EveningCommuter EveningCommuter is offline
Member
 
Join Date: Dec 2018
Location: San Bernardino
Posts: 111
EveningCommuter is on a distinguished road
I figured. Must have accidentally fixed my car.

I will check at a cold start later if the idling rpm fluctuates when warming up.
Last edited by EveningCommuter; 03-03-2019 at 06:41 PM.
EveningCommuter is offline   Reply With QuoteReply With Quote
Old 03-03-2019, 11:54 PM #13
19963.4lsr5 19963.4lsr5 is offline
Elite Member
  
Join Date: Aug 2013
Location: Stouchsburg PA
Posts: 5,323
19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold
19963.4lsr5 19963.4lsr5 is offline
Elite Member
 
Join Date: Aug 2013
Location: Stouchsburg PA
Posts: 5,323
19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold
The idle rpm should slowly drop as it warms up.

There is a vacuum line that comes off the IAC and goes to a T which goes to each side of the manifold. Make sure that the IAC vacuum lines are in good shape and not barely hanging onto the nipple of the IAC or the hose is cracked.




Sent from my iPhone using Tapatalk
19963.4lsr5 is offline   Reply With QuoteReply With Quote
Old 03-04-2019, 07:06 PM #14
EveningCommuter EveningCommuter is offline
Member
  
Join Date: Dec 2018
Location: San Bernardino
Posts: 111
EveningCommuter is on a distinguished road
EveningCommuter EveningCommuter is offline
Member
 
Join Date: Dec 2018
Location: San Bernardino
Posts: 111
EveningCommuter is on a distinguished road
I will go ahead and check those lines too.

I would also like to add:

1900 RPM at 60 MPH
2200 RPM at 70 MPH
EveningCommuter is offline   Reply With QuoteReply With Quote
Reply

Tags
cover , drops , idling , torque , valve

« 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
Torque on valve cover bolts? This may be a stupid question... OldRigNewParts Engines / Suspension / Wheels / Tires / Audio / Accessories 2 02-22-2018 06:52 PM
Torque spec of exhaust manifold to air check valve? TerraCrawler 5th gen T4Rs 4 07-11-2017 04:55 PM
Torque Converter Access Cover Location? Troymclure 4th Gen T4Rs 1 04-23-2016 03:53 PM
FS: 3rd Gen Floor Mats, Cargo Cover, random stuff TCMach For Sale: T4R Items 13 08-05-2013 09:17 PM
What do you torque your valve cover to? PrinceYota 3rd gen T4Rs 3 07-20-2013 10:43 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 10:36 AM.

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