Surging and rough idle - Diesel Forum - TheDieselStop.com
Ford Diesel Forum / Powerstroke Forum
Ford Diesel Forum / Powerstroke Forum
Go Back   Diesel Forum - TheDieselStop.com > Ford Diesels > 6.9L Diesels

6.9L Diesels Technical discussion of topics related to vehicles powered by the 6.9 Liter In-Direct Injection Navistar engines.

TheDieselstop.com is the premier Diesel Truck Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 01-14-2013, 10:56 AM   #1 (permalink)
Senior Member
 
Join Date: Nov 2010
Posts: 147
My Photos: (0)
Feedback Score: 0 reviews
Surging and rough idle

The last couple days my truck has been running weird. The engine has been surging randomly while I am driving. Also the engine will start running rough after I start it, especially if it has just been run a few minutes prior. The engine has also started to run rough at a normal idle several times.

Just a little under 2 years ago I bought a return line kit and installed that. I do not see any visible signs of fuel by any of the injector caps. Also, I have a racor fuel/water separator and I do not see any fuel leakage elsewhere in the system. I also replaced the lift pump less than a year ago.

Before I installed the current return line kit, I was having problem with rough idle, but it would clear up after a 30 sec or so of running. This is the first time I have had the engine run like this after driving for a bit. Does this seem like maybe I need a new return line kit again, or could there be something else that I am missing?
__________________
1986 F250 w/Banks turbo
C6 auto, 3.55 gears

Last edited by dieselnoob4; 01-14-2013 at 11:46 AM.
dieselnoob4 is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 01-16-2013, 06:35 PM   #2 (permalink)
Senior Member
 
Join Date: Nov 2010
Posts: 147
My Photos: (0)
Feedback Score: 0 reviews
Just wondering if anyone has any input on my problem? I am thinking that I will just plan on purchasing another return line kit and go from there. My biggest concern has been the engine surging and rough idle after it has been running for a few minutes. I never had that happen before I put in the current return line kit. Before I installed the current kit, I was only having problems with rough idle and stalling right after I started the engine.
__________________
1986 F250 w/Banks turbo
C6 auto, 3.55 gears
dieselnoob4 is offline   Reply With Quote Quick reply to this message
Old 01-16-2013, 07:41 PM   #3 (permalink)
Senior Member
 
NH2112's Avatar
 
Join Date: Oct 2009
Location: Windham, ME
Posts: 2,235
My Photos: (2)
Feedback Score: 1 reviews
Send a message via MSN to NH2112 Send a message via Yahoo to NH2112
I wouldn't concentrate on the return lines, but rather check all potential sources of air intrusion. Fuel heater O-rings, WIF sensor, return lines & caps, etc. You might save yourself the hassle of doing return lines. Or you may find that the return lines AND something else are letting air in.
__________________
Phil

Check my lists of common part numbers in my photos! Updated often!

1991 F350 Lariat XLT, 7.3l, 5-speed, crew cab, SRW, 3.55, 2WD.

1990 Jeep Wrangler Sahara, in the process of a major overhaul/upgrade. OM617 on the horizon! Front & rear Dana 44s from a Wagoneer till I get some 1-ton axles built & narrowed, and eventually a front shackle reversal. Diesel YJ, bay-BEE, and not a cookie-cutter 4BT conversion!
NH2112 is offline   Reply With Quote Quick reply to this message
Old 01-17-2013, 07:13 AM   #4 (permalink)
Member
 
Join Date: Mar 2009
Posts: 52
My Photos: (0)
Feedback Score: 0 reviews
Other than leaking return lines should have no effect on a running engine. I would first check for leaks on suction( supply side) to include the tank pickup.
leyrret is offline   Reply With Quote Quick reply to this message
Old 01-17-2013, 09:21 AM   #5 (permalink)
Junior Member
 
SixtySix Ford's Avatar
 
Join Date: Jan 2013
Location: Denver CO.
Posts: 2
My Photos: (0)
Feedback Score: 0 reviews
I had almost the same problem and I found I had #4 cylinder going dead. I found I had a injector stop working on #4 cylinder. So I ordered all new injectors and installed em and it went away.
__________________
"Nitrous is like hot girl with with STD's. You know you wanna hit it, but your afraid of the consequences."

66 Ford F100 - Project SickUp

85 Ford F-350 Crew cab Dually - Project Bagged on Semi'z

Last edited by SixtySix Ford; 01-17-2013 at 09:26 AM.
SixtySix Ford is offline   Reply With Quote Quick reply to this message
Old 01-17-2013, 09:21 AM   #6 (permalink)
Senior Member
 
chuckster57's Avatar
 
Join Date: Apr 2008
Location: Central Valley, Ca.
Posts: 15,611
My Photos: (7)
Feedback Score: 1 reviews
Surging and rough idle

If you still have the factory water separator on the firewall, the drains are a known issue. Clamp a bolt in the rubber drain line, and see if that helps.


Sent from my iPhone using AutoGuide.com App
__________________
1994 F-350 7.3 IDI Turbo, crew cab, E4OD,4:10 L/S, LB, Dually Photos
ATS Turbo upgrades: 3" DP with 3" exhaust Magnaflow XL muffler: Pictures Here
2012 Copper Canyon 273 FWRET w/2 slides, Air Lift 5000 bags
Pillar pod: Autometer C2 Series gauges: pyro,trans, boost, water, oil pressure
Hypermax Cowl induction, K&N air filter, flex-a-lite 26K trans cooler with fan,Tekonsha prodigy
Train Horns: Pictures here

PM please not visitor message
chuckster57 is offline   Reply With Quote Quick reply to this message
Old 01-22-2013, 11:11 PM   #7 (permalink)
Junior Member
 
Join Date: Dec 2012
Posts: 9
My Photos: (0)
Feedback Score: 0 reviews
Surging and rough idle

When have fuel filters been changed?


Sent from AutoGuide.com App
idi 12v man is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

  Diesel Forum - TheDieselStop.com > Ford Diesels > 6.9L Diesels

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Diesel Forum - TheDieselStop.com 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:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

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
Trackbacks are On
Pingbacks are On
Refbacks are On



Wheel & Tire Center

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 01:59 AM.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.