Runaway, what is it, how do I stop it?! - Dodge Cummins Diesel Forum
- HOME - FORUMS - GARAGE - TECH - ARTICLES - CHAT - CLASSIFIEDS - REVIEWS - VIDEOS - MEMBER MAP - STORE - INSURANCE -
- REGISTER - CALENDAR - INFO - SITE HELP - RULES - STAFF - MEMBERSHIP - ADVERTISE - CONTACT US -


Welcome to the Dodge Cummins Diesel Forum, the fastest growing Dodge Diesel Community on the internet.

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact contact us
Go Back   Dodge Cummins Diesel Forum > Technical Articles - Writeups - Guides Section > 89-93 Tech Articles
89-93 Tech Articles Tech Articles for the 89-93 12V Dodge Cummins Diesel...NO ADVERTISING

CumminsForum.com is the premier Dodge Diesel Truck Forum on the internet. Registered Users do not see the above ads.

Auto Insurance

» Featured Product
Wheel & Tire Center

Closed Thread
 
LinkBack Thread Tools Display Modes
Old 07-06-2007, 08:37 PM   #1 (permalink)
Diesel Freak
 
Cowboy_Customs's Avatar
 
Join Date: Nov 2006
Location: Port Crane (Bingo) NY
Posts: 674
Thanks: 5
Thanked 13 Times in 10 Posts
iTrader Score: 0 reviews
Runaway, what is it, how do I stop it?!

Welcome to Cummins Forum, odds are if your reading this your new to the 1st gen Cummins. I am going to explain what runaway is, what causes it, and how u stop it!
What is a runaway?
A runaway can occur while turning up the fuel on the VE injection pump, the reason they run away is that the control collar can't move far enough towards the "defuel" end of the plunger (making the spill port area smaller), and the backpressure in the spill port becomes high enough that engine speed goes out of control. This is why they will idle OK but then hang at high RPM. At low RPM there's not enough backpressure to start the runaway.

How do u prevent a runaway?
Simple, turn the fuel screw in with the engine running using a special procedure. With every 1/2 turn of the fuel screw, snap the throttle. IF the throttle hangs in the upper RPM's before coming back down your on the edge of runaway, or if it will not comeback down to its prior RPM, back your fuel screw back out at least 1/2 turn.
How do u stop a runaway?
Remove an intake somewhere on the engine, if your doing this by yourself, open the intake on the driver side of the engine, if 2 people, remove the intake at the turbo and give your sidekick the board to cover the inlet into the turbo. What your doing is choking the engine should the runaway occur. This will the engine down.
You need to keep a sturdy board handy while your turning up the power, after all u dont want plywood sucked into your motor at 6000 RPM's do ya?

This is runaway, and thats how u can try to prevent it, and stop it. Still want to turn uo the power??
__________________
'95 3500 SLT Laramie clubcab 4x4 bolt action flatbed Pacbrake 60# springs timed and tuned 4.10LS 19.5's and 309K on the clock!
http://community.webshots.com/user/Cowboy_Customs

Last edited by Cowboy_Customs; 07-07-2007 at 12:11 PM.
Cowboy_Customs is offline   Quick reply to this message
Sponsored Links
Advertisement
 
Old 07-07-2007, 10:48 AM   #2 (permalink)
Banned
 
Join Date: Sep 2006
Location: Central NY in the woods!!
Posts: 1,168
Thanks: 3
Thanked 4 Times in 4 Posts
iTrader Score: 0 reviews
I do, i do, where is is my fuel screw!!!!!!
Diesel Dummy is offline   Quick reply to this message
Old 07-07-2007, 11:23 AM   #3 (permalink)
Cummins Fanatic
 
chuckect's Avatar
 
Join Date: May 2007
Location: louisville ky
Posts: 138
Thanks: 7
Thanked 1 Time in 1 Post
iTrader Score: 0 reviews
I am a dummy too. the previous owner told me that the power was turned up slightly and that 40+ injectors were installed, so i'm fine for power and fuel. My question (if I may ask it here) is what do I heat up when I turn the key on and wait for the light to go out and how hot does it get and does it have a limit switch of some sort.
__________________
92 RAM 250, (234.000 when I bought it in 2007) - rebuilt 3.54 rear-end, rebuilt auto trans. 40 HP injectors, BHAF, new fuel injection pump, bully dog fuel pin (8/28/08)---added boost and trans temp gauges (08/22/2010)----added 4" exhaust(12/01/2010)
chuckect is offline   Quick reply to this message
Old 07-07-2007, 11:56 AM   #4 (permalink)
Diesel Head
 
Join Date: Jun 2006
Location: Sacramento, CA
Posts: 3,482
Thanks: 14
Thanked 34 Times in 28 Posts
iTrader Score: 0 reviews
Heater Grid. Right where the intake horn comes out of the intercooler and goes into the motor is a grid that gets hot when electricity is applied to it. This warms the air entering a cold engine so that the air, when compressed, will be warm enough to support combustion.

"Other" diesels perform this task with glow plugs.
__________________
94 Reg Cab 4x4 6 speed
A little work here and there..........
Diesel Nut is offline   Quick reply to this message
Old 07-07-2007, 12:15 PM   #5 (permalink)
Diesel Freak
 
Cowboy_Customs's Avatar
 
Join Date: Nov 2006
Location: Port Crane (Bingo) NY
Posts: 674
Thanks: 5
Thanked 13 Times in 10 Posts
iTrader Score: 0 reviews
Quote:
Originally Posted by Diesel Dummy View Post
I do, i do, where is is my fuel screw!!!!!!
Yer fuel screw is located on either side of yer upper torso, what ya gotta do is find a product u like that adds more power, look at the price tag, then find someone to grab ahold of a limb onb yer upper torso, and then pull it behind yer back, and twist till u cant take it anymore, forceing yerself to spend hundreds of dollars on computer boxes! :
__________________
'95 3500 SLT Laramie clubcab 4x4 bolt action flatbed Pacbrake 60# springs timed and tuned 4.10LS 19.5's and 309K on the clock!
http://community.webshots.com/user/Cowboy_Customs
Cowboy_Customs is offline   Quick reply to this message
The Following User Says Thank You to Cowboy_Customs For This Useful Post:
Von Wilsonator (12-15-2012)
Sponsored Links
Advertisement
 
Closed Thread

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Dodge Cummins Diesel 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:

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.



Thread Tools
Display Modes

Posting Rules
You may not 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


Powered by vBadvanced CMPS v3.2.2

All times are GMT -4. The time now is 03:50 AM.



Powered by vBulletin® Copyright ©2000 - 2014, vBulletin Solutions, Inc.

SEO by vBSEO 3.3.2