High idle - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > YJ Jeep Wrangler Forum > YJ General Discussion Forum

Join Wrangler Forum Today


Like Tree1Likes
  • 1 Post By Got it at last
Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 09-19-2019, 06:58 PM
Thread Starter
  #1
Jeeper
 
rushwal's Avatar
 
Join Date: Mar 2018
Location: Birmingham
Posts: 372
High idle

Sometimes when starting my Jeep, it idles high and won't settle down even after warmed up. The only way to get it to idle down is to push down the throttle lever.

Am I engaging some mode, or is it just sticking?

https://youtu.be/sor8rLEwa1M

rushwal is offline   Quote
Old 09-19-2019, 07:14 PM
Thread Starter
  #2
Jeeper
 
rushwal's Avatar
 
Join Date: Mar 2018
Location: Birmingham
Posts: 372
Quote:
Originally Posted by rushwal View Post
Sometimes when starting my Jeep, it idles high and won't settle down even after warmed up. The only way to get it to idle down is to push down the throttle lever.

Am I engaging some mode, or is it just sticking?

https://youtu.be/sor8rLEwa1M
Not sure why my sig didn't show up.


__________________
1988 Jeep Wrangler 4.2 6 cyl, Weber Carb, Borla header and exhaust. Aisin AX15. Advance Adapters External Slave conversion. Pro Comp 51 D window Flat Black. BFGoodrich KO2 31". Currently fighting: The little things...

2018 Jeep Grand Cherokee
2017 Honda Civic Si Coupe
rushwal is offline   Quote
Old 09-19-2019, 08:32 PM   #3
Jeeper
 
Yjalex's Avatar
 
Join Date: Aug 2019
Location: Texas
Posts: 67
Try some pb blaster, looks gummed up, check springs


Sent from my iPhone using Tapatalk
Yjalex is offline   Quote
Sponsored Links
Advertisement
 
Old 09-19-2019, 08:38 PM   #4
Moderator

WF Lifetime Member
WF Supporting Member
::WF Moderator::
 
Luckymac's Avatar
 
Join Date: Jan 2014
Location: SouthEast of Denver
Posts: 8,804
When you go to start a cold carbureted engine the process is as follows:
1- Turn key to "on" position
2- Step on gas pedal to the floor and release it.
3- Turn key to "start" and crank until it starts.
If it doesn't start quickly, press gas pedal again once.
4- Once vehicle is started, allow it to warm up a bit (3-5 minutes) at high idle
5- depress gas pedal and idle should be normal

If the above describes what's going on when you start your Jeep, it's normal, assuming your choke is set correctly. Every vehicle gains it's own idiosyncrasies as it ages. Add to that a non-stock carb and exhaust and your particular Jeep might be a bit different from what I state above.

When you state that "The only way to get it to idle down is to push down on the throttle lever" do you mean step 5? Or do you mean you have to manipulate the throttle linkage?

Good Luck, L.M.
__________________
"Wrangler....It's not just a vehicle, It's a lifestyle".
.................................................. ........................
1987 YJ-4.2L-Standard Shift- Re-manufactured Carter Carb-2" body Lift-31X10.5X15 BFG KOs-190K Miles No back seat.
HEI distributor with computer and all related relays and wiring removed.
12K Badlands winch with dual batteries.
Warn front bumper. Matching imitation Warn bumper on the rear.
Luckymac is offline   Quote
Old 09-20-2019, 06:48 PM
Thread Starter
  #5
Jeeper
 
rushwal's Avatar
 
Join Date: Mar 2018
Location: Birmingham
Posts: 372
Quote:
Originally Posted by Luckymac View Post
When you go to start a cold carbureted engine the process is as follows:
1- Turn key to "on" position
2- Step on gas pedal to the floor and release it.
3- Turn key to "start" and crank until it starts.
If it doesn't start quickly, press gas pedal again once.
4- Once vehicle is started, allow it to warm up a bit (3-5 minutes) at high idle
5- depress gas pedal and idle should be normal
The above is my normal process for starting my Jeep in the morning.

However, on random occasions, when I start my Jeep, it idles higher at @1500 RPM and will not idle back down once it warms up. The only way to get it to idle down is to open the hood and push down on the throttle linkage (thanks for the words).

Quote:
Originally Posted by Luckymac View Post

When you state that "The only way to get it to idle down is to push down on the throttle lever" do you mean step 5? Or do you mean you have to manipulate the throttle linkage?

Good Luck, L.M.
__________________
1988 Jeep Wrangler 4.2 6 cyl, Weber Carb, Borla header and exhaust. Aisin AX15. Advance Adapters External Slave conversion. Pro Comp 51 D window Flat Black. BFGoodrich KO2 31". Currently fighting: The little things...

2018 Jeep Grand Cherokee
2017 Honda Civic Si Coupe
rushwal is offline   Quote
Old 09-20-2019, 07:29 PM   #6
Supporting Member

5-Year WF Supporting Member
 
Got it at last's Avatar
 
Join Date: Nov 2016
Location: Phoenix, Az
Posts: 1,795
You could also check to see if the little nylon bushing on the cable at the accelerator pedal is loose enough to occasionally get hung up enough to keep cable from sliding back all the way, or maybe try a little stronger return spring.
rushwal likes this.

__________________
'89 YJ 4.2 with MC-2150 Carb & HEI, 2-1/2" Magnaflow Exhaust. AX-15, NP231, Adams front driveshaft, SYE kit, 31x 10.5 x15 BFG KO's, 2 1/2" RE Springs, 1" Body Lift. RS5000x shocks, Hella H-4's, XRC 9500 Winch, No emissions.

FSM Manuals https://www.dropbox.com/sh/0vfmk6jc5...v7lceZk7a?dl=0
Got it at last is offline   Quote
Reply

Thread Tools

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






All times are GMT -5. The time now is 08:56 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.1
User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.

Jeepģ, Wrangler, Liberty, Wagoneer, Cherokee, Gladiator, Mopar and Grand Cherokee are copyrighted and trademarked to FCA US LLC.
Wranglerforum.com is not in any way associated with FCA US LLC.