2018 JL 4-cylinder turbo throttle lag - Any ideas? - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > JL Jeep Wrangler Forum > JL Wrangler Technical Discussion

Join Wrangler Forum Today


Like Tree1Likes
  • 1 Post By Blastek
Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 07-09-2019, 07:25 PM
Thread Starter
  #1
Newb
 
Join Date: Jul 2019
Location: Fort Collins
Posts: 3
2018 JL 4-cylinder turbo throttle lag - Any ideas?

I have a 2018 Jeep Wrangler Sport 2-door 4-cylinder turbo. I'm having an issue that I can't figure out. The Jeep has about a 2 second delay on the throttle when I push the gas pedal down. It's only noticeable when I'm moving. I have no issues from a dead stop. I put a full description of the behavior at the bottom of this message.

I know electric throttles have a delay. I expect it. This is not the old cable throttle system. However, none of the other cars I've owned ever had a delay like this.

I bought an iDrive hoping it would fix the issue. The iDrive works great, just as advertised, AFTER I'm past the throttle delay. It's a lot of fun to drive but does not address the initial throttle press delay issue.

This is also not the auto-stop/start function. The car is running and moving the whole time.

I brought the Jeep into the dealer to check the issue. They did a PCM software update but said they couldn't duplicate the issue (surprise, surprise...).

Has anyone else heard or or dealt with this? It really bugs me. All suggestions are appreciated.

------------------
Hereís the step by step description of what happens Ė

1 - Iím driving at normal street speeds. I press the gas pedal to accelerate. I can count to two, 1-2, before anything significant happens. It sounds like the engine is winding up (although the tach doesnít change) but no additional power is getting to the wheels. After a count of two, the power goes to the wheels and the car will accelerate. Depending how hard I was pushing the pedal, the Jeep will lurch forward or the acceleration may be gentle. Itís most noticeable when pushing down the pedal fairly far and fast to pass a car in a short space (not flooring it, just a good definitive push).

2 Ė The same scenario as above but this time Iím making a right-hand turn at a green light. This is where the issue is most troublesome. The car is moving the whole time. It never stopped. It never turned off. I press the gas, hear the engine rev up, count 1-2, then the car accelerates. This time though, Iím in a corner. When the car accelerates, the car will lurch when the real wheels start getting power and I have to keep the car from trying to fishtail (I never let it get bad enough to lose control.)

Thoughts?

moralmugwump is offline   Quote
Old 07-09-2019, 11:35 PM   #2
Jeeper
 
Blastek's Avatar
 
Join Date: Mar 2012
Location: Portland, OR
Posts: 2,749
Sounds more like a transmission or transmission computer issue. One thing you could try is disconnecting the battery for a few minutes.
FlintRock12 likes this.

__________________
2012 Deep Cherry Red JKU Sport S - Tickastar, 6 speed, 3.73, Dual Tops
Blastek is offline   Quote
Old 07-10-2019, 02:28 AM   #3
Jeeper
 
Lemotan's Avatar
 
Join Date: Mar 2019
Location: California
Posts: 357
Quote:
Originally Posted by Blastek View Post
Sounds more like a transmission or transmission computer issue. One thing you could try is disconnecting the battery for a few minutes.
This, and "relearn throttle procedure".
Lemotan is offline   Quote
Sponsored Links
Advertisement
 
Old 07-10-2019, 10:29 AM   #4
Supporting Member

5-Year WF Supporting Member
 
RubiconSS's Avatar
 
Join Date: Jul 2014
Posts: 15,971
If that is not an intermittent issue I can't see how the dealer says " unable to duplicate" 2 seconds is a significant delay.
There's an issue causing it has to be addressed.
Products like pedal commander negates throttle lag but not intended to fix a problem.
__________________
"Sticking Feathers up Your Butt does Not make You a Chicken"
RubiconSS is offline   Quote
Old 07-10-2019, 11:08 AM
Thread Starter
  #5
Newb
 
Join Date: Jul 2019
Location: Fort Collins
Posts: 3
Thanks guys. I didn't realize the new systems in the Jeep actually learned how you drive. I'll try disconnecting the battery then retrain the throttle procedure. Maybe I was too conservative driving when I first got the Jeep
moralmugwump is offline   Quote
Old 07-11-2019, 01:19 PM   #6
Newb
 
Join Date: Oct 2012
Posts: 8
Im going to try this as well.
ozzysjeep is offline   Quote
Old 07-11-2019, 05:16 PM   #7
Newb
 
Ernie N's Avatar
 
Join Date: Mar 2019
Location: Cook County
Posts: 10
I've driven several 2.0 turbos, and also own one. I have never experienced what you are describing.

I agree with others, must need another 're-flash' by the dealer.

BTW, I broke in my new 2.0 "by the book" and babied it the first 500 miles.
__________________
Front interior pull straps, black stubby 12" antenna, Jeep Trail Rated Off Road Emergency Kit by Warn, Black Fire Extinguisher Holder, two black Roll Bar Sunglasses Holders.
Ernie N is offline   Quote
Old 07-12-2019, 04:24 PM   #8
Jeeper
 
Join Date: Jul 2014
Posts: 162
try goign about 15 mph then hit the gas. last one i drove had a 1-2 second delay before actually moving. Also did this on a 3.6. its annoying
XJ4PLAY is offline   Quote
Old 07-14-2019, 03:19 PM   #9
Jeeper
 
Join Date: May 2018
Posts: 218
Quote:
Originally Posted by moralmugwump View Post
I have a 2018 Jeep Wrangler Sport 2-door 4-cylinder turbo. I'm having an issue that I can't figure out. The Jeep has about a 2 second delay on the throttle when I push the gas pedal down. It's only noticeable when I'm moving. I have no issues from a dead stop.

It's that well-known turbo lag. You don't feel it off the line because the eco-boost thingy is providing an assist. The scenarios you've described that have a noticeable lag I understand are situations where the eco-boost will not engage to hide the turbo lag.

Muffin Top is offline   Quote
Reply

Tags
acceleration , delay , throttle

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 01:05 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, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC