weird idle fluctuations and driving - Jeep Commander Forums: Jeep Commander Forum
Intakes Questions or advice about intakes? This is the place...

 
LinkBack Thread Tools Display Modes
post #1 of 3 (permalink) Old 06-27-2015, 02:48 PM Thread Starter
Senior Member
Points: 10,034, Level: 66 Points: 10,034, Level: 66 Points: 10,034, Level: 66
Level up: 96% Level up: 96% Level up: 96%
Activity: 0% Activity: 0% Activity: 0%
 
Mk153smaw's Avatar
 
Join Date: Dec 2014
Location: East Meadow, NY
Own a Commander?: Yes
Model year: 2006
Trim Package: Limited
Power-Train: 5.7L V-8 Hemi
4WD
If 4WD - system: QD-II
Current Mileage: 120000
Posts: 309
Garage
weird idle fluctuations and driving

Ok, been a little while since I have been on and haven't even got a chance to get any motor work done for last couple of months.
What I have is an issue with the engine not being able to remain in idle for long. I will get symptoms:
1. Idle RPM will jump to 1000 and motor will sound erratic
2. Engine code for implausible amount of fuel
3. Check engine cap error

This will happen during driving also, really annoying when I am on the highway and it goes into a throttle limp mode.

Has anyone had this? might it be related to the TB upgrade or something annoying like a fuel regulator? I still need to check the fuel pressure through idle and drive cycles.

Dave

Really sucks because I have a tone of parts waiting for install

'06 Hemi Limited 4X4, 6(ish)" lift, 35" General Red Letter, 2" spacers, Mopar CAI, RER and mygig lockpick, blue Interior LEDs, stub antenna 3", Callahan Red Brake set, 6.1L SRT8 exaust headers, full custom 3" exhaust from headers back, Fastman 847 ported TB, BBK Fuel Rails, 6.1L injectors, JBA UCAs, Nitro gear 4:10, SA hidden front winch mount.
Mk153smaw is offline  
Sponsored Links
Advertisement
 
post #2 of 3 (permalink) Old 06-28-2015, 03:57 PM
Junior Member
Points: 418, Level: 8 Points: 418, Level: 8 Points: 418, Level: 8
Level up: 36% Level up: 36% Level up: 36%
Activity: 0% Activity: 0% Activity: 0%
 
Join Date: Jan 2014
Posts: 11
The funky idle sounds like a throttle position sensor gone bad. It's about $40 dollars and fifteen minute fix. I replaced mine when it was doing the same thing, and no issues since. Didn't have the other codes, however.
geronimo is offline  
post #3 of 3 (permalink) Old 08-29-2015, 11:27 AM Thread Starter
Senior Member
Points: 10,034, Level: 66 Points: 10,034, Level: 66 Points: 10,034, Level: 66
Level up: 96% Level up: 96% Level up: 96%
Activity: 0% Activity: 0% Activity: 0%
 
Mk153smaw's Avatar
 
Join Date: Dec 2014
Location: East Meadow, NY
Own a Commander?: Yes
Model year: 2006
Trim Package: Limited
Power-Train: 5.7L V-8 Hemi
4WD
If 4WD - system: QD-II
Current Mileage: 120000
Posts: 309
Garage
Found the issue. When I last played with the stock headers I left off the heat shields... Jackass move. I melted the upstream O2 sensor wires and it was causing havok on my fuel ratio. Fixed those wires and insulated the headers... Problem splved
Mk153smaw is offline  
Sponsored Links
Advertisement
 
Reply

  Jeep Commander Forums: Jeep Commander Forum > Jeep Commander Discussion > Performance Modifications > Intakes

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Jeep Commander Forums: Jeep Commander Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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 On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome