Rough Idle and stall on cold start - Page 2 - Hyundai Forum - Hyundai Enthusiast Forums


Hyundai XG 350 The mid-sized luxury model

Reply
 
 
 
Thread Tools Search this Thread
  #11  
Old 10-20-2017, 10:41 AM
Junior Member
Thread Starter
 
Join Date: Sep 2017
Posts: 23
Default

Quote:
Originally Posted by JockeHyundai View Post
Crank shaft position sensor?
I dont expect that to be the issue. If that was the problem I would expect a code relating to it.
Reply With Quote
  #12  
Old 10-20-2017, 10:44 AM
Junior Member
Thread Starter
 
Join Date: Sep 2017
Posts: 23
Default Update

I noticed a pattern. It starts perfectly fine on cold mornings. The fuel trims are way negative, indicating a rich condition which the computer is compensating for. -15% and -19% on each bank.


Will be changing fuel pressure regulator this weekend.
Reply With Quote
  #13  
Old 11-01-2017, 03:37 PM
Junior Member
Thread Starter
 
Join Date: Sep 2017
Posts: 23
Thumbs up Solved!!!!



Fuel pressure regulator was the problem. Starts smooth and idles fine now.

Better fuel economy and smoother engine.
Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Rough idle and start up mweide27 Hyundai XG 350 1 10-02-2017 10:49 PM
03 Santa Fe accelerator not working and brake causes engine to stall jkar Hyundai Santa Fe 1 01-07-2014 07:59 AM
rough idle after disconnecting and reconnecting battery jassmith Hyundai Accent 4 03-01-2008 07:16 PM
Rough idle and fuel smoke! jbragg923Justin General Tech Help 1 11-14-2007 09:47 AM
rough idle and windshield fluid pump keiffer Hyundai Sonata 0 06-09-2006 01:02 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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


Advertising
Featured Sponsors
Vendor Directory

All times are GMT -5. The time now is 03:20 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.