Engine Stumble at idle - Subaru Impreza WRX STI Forums: IWSTI.com
STI Forum
Join
Start New Thread Create Account Advertise FAQ Members List Contact
Stumble at idle
Stumble at idle
Go Back   STI Forums > > > Engine Stumble at idle
Reply
 
Thread Tools
Old Yesterday, 06:08 AM   #1
PNash
Becoming A Contributor
Feedback Score: 0 reviews
 
Fav Mod: Coming Soon
My Threads
Posts: 24
My Subaru Parts for sale

Join Date: Dec 2018
PNash is an unknown quantity at this point
Default Stumble at idle

When sitting at idle I have vacuum that fluctuates between -8.6 and -9.1 and I get a pretty consistent stumble. Car is a 19 STI with 5100 miles on it.

I don't know if it's new or I am just now noticing it. I feel like I remember it being pretty rock solid.

Thoughts? Is this just a product of being in S#?

Sent from my SM-N950U using Tapatalk
PNash is offline  
Likes 0 Dislikes 0
 
Reply With Quote
Sponsored Links
Advertisement
 
Old Yesterday, 06:33 AM   #2
bsowers2018
Contributor
Feedback Score: 0 reviews
 
Car: Crystal Black 2018
Fav Mod: being different and leaving it stock.......
My Threads
Posts: 63
My Subaru Parts for sale

Join Date: Apr 2018
Location: Louisville
bsowers2018 is an unknown quantity at this point
Default Re: Stumble at idle

My 18 does it with the a/c on. Pretty pronounced stumble. Sometimes I use S# with the a/c on to compensate for the power loss, but didn't associate S# mode with the stumble. I will try it in S and S# to see what happens and post again
bsowers2018 is online now  
Likes 0 Dislikes 0
 
Reply With Quote
Old Yesterday, 08:10 AM   #3
CapedCrusader92
Contributor
Feedback Score: 0 reviews
 
Car: DGM 17 STi
Fav Mod: Driver - Stage 1
My Threads
Posts: 50
My Subaru Parts for sale

Join Date: May 2016
Location: Northern IL
CapedCrusader92 is on a distinguished road
Default Re: Stumble at idle

My 2017 does the same thing - when the A/C compressor kicks on. If you have an accessport you can adjust the idle RPM when the air conditioning is on. I bumped mine up about 200 revs and it's a bit better - not as much of a drop.
CapedCrusader92 is offline  
Likes 0 Dislikes 0
 
Reply With Quote
Sponsored Links
Advertisement
 
Old Yesterday, 06:59 PM   #4
Noximus
Advanced Mastery Level II
Feedback Score: 3 reviews
 
Fav Mod: 2015 STI Steering Rack!
My Subaru Parts for sale

Join Date: May 2013
Location: Canada eh?
Noximus is a glorious beacon of lightNoximus is a glorious beacon of lightNoximus is a glorious beacon of lightNoximus is a glorious beacon of lightNoximus is a glorious beacon of light
Default Re: Stumble at idle

It does this on old gens too when the AC is on
Noximus is offline  
Likes 0 Dislikes 0
 
Reply With Quote
Old Today, 04:17 AM   #5
PNash
Becoming A Contributor
Feedback Score: 0 reviews
 
Fav Mod: Coming Soon
My Threads
Posts: 24
My Subaru Parts for sale

Join Date: Dec 2018
PNash is an unknown quantity at this point
Default Re: Stumble at idle

Yeah, it was definitely the AC. Thanks, guys!

Sent from my SM-N950U using Tapatalk
PNash is offline  
Likes 0 Dislikes 0
 
Reply With Quote
Sponsored Links
Advertisement
 
Reply

Thread Tools

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

Forum Jump


New To Site? Need Help? More

All times are GMT -8. The time now is 08:01 AM.


Powered by vBulletin
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Designed & Powered by Domain Architect
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.