Go Back   iRV2 Forums > MOTORHOME FORUMS > Class A Motorhome Discussions
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 10-02-2010, 09:27 PM   #1
Member
 
sidewinder2's Avatar
 
Join Date: Jun 2010
Location: Roseburg, Oregon
Posts: 77
Why does Ford 460 engine stall on deceleration?

I am traveling with a friend with a 1998 Damon with a Ford 460 engine. We were eastbound on the 70 coming into Denver when a coach in front of us caught fire and all eastbound traffic stopped. we were in a heavy climb and my friends coach stalled when he came to a stop. This is the second time this happened on this trip. We are out for three weeks to Michigan from California and back and we're hoping someone can recognize the problem and advise as to how we can fix it.
__________________

__________________
sidewinder2
2014 Itasca Viva
Joe & Judy
sidewinder2 is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 10-02-2010, 10:12 PM   #2
Senior Member
 
Wanabee FTer's Avatar
 
Gulf Streamers Club
Ford Super Duty Owner
Join Date: Jul 2010
Location: Golden Village Palms, CA
Posts: 1,988
Blog Entries: 12
I am not a Ford tech but if that happened to me I would clean and service the throttle body first, then go from there. It is fairly common for fuel deposits to build up inside the throttle bore and cause air starvation when rapidly decelerating. I believe there is also an idle/air valve for the fuel injection which may be dirty or faulty. Try adding a good quality fuel injection cleaner when filling the tank. Make sure to add enough as per the directions on the bottle so it can effectively clean the fuel system. Hope this helps and good luck.
__________________

__________________
John
'98 Gulf Stream Sunsport 325, 7.5L Banks Power Pack, Koni FSD's, Air Bags, ReadyBrute Elite,
2000 Honda Accord

Wanabee FTer is offline   Reply With Quote
Old 10-03-2010, 07:41 AM   #3
Member
 
sidewinder2's Avatar
 
Join Date: Jun 2010
Location: Roseburg, Oregon
Posts: 77
When this happens, is there something we can do to make the situation better? Will fuel addatives help or is a mechanic required?
__________________
sidewinder2
2014 Itasca Viva
Joe & Judy
sidewinder2 is offline   Reply With Quote
Old 10-03-2010, 08:11 AM   #4
Senior Member
 
Wanabee FTer's Avatar
 
Gulf Streamers Club
Ford Super Duty Owner
Join Date: Jul 2010
Location: Golden Village Palms, CA
Posts: 1,988
Blog Entries: 12
You could try a fuel system cleaner like Chevron Techron 1st while continuing your trip to see if it improves. I think his Ford chassis has a 60 gallon gas tank so adjust amount accordingly.
__________________
John
'98 Gulf Stream Sunsport 325, 7.5L Banks Power Pack, Koni FSD's, Air Bags, ReadyBrute Elite,
2000 Honda Accord

Wanabee FTer is offline   Reply With Quote
Old 10-03-2010, 10:59 AM   #5
Senior Member
 
txdutt's Avatar
 
Workhorse Chassis Owner
Join Date: Aug 2010
Location: Parker, CO
Posts: 185
try a couple of cans of Seafoam fuel additive-did a check engine light come on when it stalled?
__________________
2011 Ford F250 Lariat C/C 6.7 PSD-Curt 20k Lb Hitch
2013 Infinity 3860MS 5'er
2009 Jeep Wrangler Sahara/U.S. Navy 1978-1986
txdutt is offline   Reply With Quote
Old 10-03-2010, 09:12 PM   #6
Senior Member
 
Wanabee FTer's Avatar
 
Gulf Streamers Club
Ford Super Duty Owner
Join Date: Jul 2010
Location: Golden Village Palms, CA
Posts: 1,988
Blog Entries: 12
Quote:
Originally Posted by txdutt View Post
try a couple of cans of Seafoam fuel additive-did a check engine light come on when it stalled?
Seafoam fuel additive would be great if you can find it. If the stalling is being caused by a dirty fuel/intake system it probably will not set a check engine light on a OBD I emission system.
__________________
John
'98 Gulf Stream Sunsport 325, 7.5L Banks Power Pack, Koni FSD's, Air Bags, ReadyBrute Elite,
2000 Honda Accord

Wanabee FTer is offline   Reply With Quote
Old 10-04-2010, 11:15 AM   #7
Senior Member
 
jcthorne's Avatar
 
Join Date: Jan 2010
Posts: 474
Its the idle air bypass solenoid. Usually just remove, clean with carb cleaner and reinstall with a new gasket. Its only two bolts. They get carboned up and stickey as the engine ages.
__________________
38ft 2008 Damon Daybreak 3575 (forward kitchen)on Ford 22,000lb chasis, 242" WB.
jcthorne is offline   Reply With Quote
Old 10-05-2010, 12:17 PM   #8
Junior Member
 
Join Date: Sep 2007
Posts: 8
The Catalytic Converter may be plugged, or starting to plug as the case may be. If a Ford 460 is running rich and you get down stream burning the the material inside the converter will melt. It then becomes a self perpetuating problem. Eventually you will not even be able to start the engine, unless the vehicle sits `for a period of time.

Bill
__________________
WBGrubbs is offline   Reply With Quote
Old 10-05-2010, 02:35 PM   #9
Senior Member
 
Nick-B's Avatar
 
Forest River Owners Club
Ford Super Duty Owner
Join Date: Aug 2009
Location: Vaughn, WA
Posts: 1,364
Quote:
Originally Posted by WBGrubbs View Post
The Catalytic Converter may be plugged, ...
Maybe, but the bigger GVWR class A 460 Ford chassis didn't have catalytic converters so that might not apply here. Definitely worth checking but I'm with JC on this one. Air bypass solenoid.

One other possibility is a flaky throttle position sensor but it would probably act up any time you dropped to idle.
__________________
Nick
1995 Coachmen Santara 360MB 36' w/slide.
Ford F53/460 chassis, 1997 Jeep Grand Cherokee "toad"
Nick-B is offline   Reply With Quote
Old 10-05-2010, 05:35 PM   #10
Senior Member
 
Wanabee FTer's Avatar
 
Gulf Streamers Club
Ford Super Duty Owner
Join Date: Jul 2010
Location: Golden Village Palms, CA
Posts: 1,988
Blog Entries: 12
Quote:
Originally Posted by Nick-B View Post
Maybe, but the bigger GVWR class A 460 Ford chassis didn't have catalytic converters so that might not apply here.
That's right Nick, my '97 Ford F53 chassis originated From CA (the toughest emission control state in the U.S.) and came stock without cat convertor, only emissions part I have in the exhaust is the o2 sensor and thats a good thing!
'98 and later chassis is a different story with the introduction of OBD II and would most likely require a cat convertor on most applications.
__________________
John
'98 Gulf Stream Sunsport 325, 7.5L Banks Power Pack, Koni FSD's, Air Bags, ReadyBrute Elite,
2000 Honda Accord

Wanabee FTer is offline   Reply With Quote
Old 10-09-2010, 12:07 AM   #11
Senior Member
 
PlayItForwrd's Avatar
 
Tiffin Owners Club
Join Date: Feb 2010
Posts: 312
There's 3 ways to stop an engine:
kill the spark
stop the flow of gas
stop the air flow--

Considering it's a modern FI engine, and it seems to run okay most of the time:

spark isn't the problem--
Injectors don't just shut off--
ergo, that leaves an airflow problem.

Since there's no cat to stop the OUT flow, then the problem is IN flow...

did someone mention the idle bypass?
__________________
2000 40' Tiffin Allegro Bus \ 2003 Chaparral 260 SSI
1988 53 x 14 Skipperliner \ 1995 32' Party Cruiser
1984 Goldwing Aspencade \ 1976 Harley Sportster
PlayItForwrd is offline   Reply With Quote
Old 10-10-2010, 04:00 PM   #12
Junior Member
 
Join Date: Sep 2010
Posts: 16
also see if there is a dashpot controlling the butterfly valve on the T-body. its a vacuum controlled diaphram that keeps the butterfly from slamming closed when the throttle is released. it slowly closes the valve so the abrupt change doesnt stall the engine. IF you have one, a simple vacuum test will show if it works...or if you have vacuum leak. i cant remember if/when they quit using these.
__________________
dalek_56 is offline   Reply With Quote
Old 10-10-2010, 07:26 PM   #13
Senior Member
 
Wanabee FTer's Avatar
 
Gulf Streamers Club
Ford Super Duty Owner
Join Date: Jul 2010
Location: Golden Village Palms, CA
Posts: 1,988
Blog Entries: 12
Dashpots are mainly used on carburated models, EFI engines use an air/fuel idle solenoid.
__________________
John
'98 Gulf Stream Sunsport 325, 7.5L Banks Power Pack, Koni FSD's, Air Bags, ReadyBrute Elite,
2000 Honda Accord

Wanabee FTer is offline   Reply With Quote
Old 10-11-2010, 08:18 AM   #14
Senior Member
 
Workhorse Chassis Owner
Join Date: Sep 2007
Location: st.charles mo.
Posts: 1,194
Quote:
Originally Posted by jcthorne View Post
Its the idle air bypass solenoid. Usually just remove, clean with carb cleaner and reinstall with a new gasket. Its only two bolts. They get carboned up and stickey as the engine ages.
This is the correct answer(idle air compensator)(IAC) just remove it and clean with carb cleaner and replace with new gasket.
__________________

__________________
speed racer is offline   Reply With Quote
Reply



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Ford 460 rjmo Ford Motorhome Chassis Forum 9 09-18-2010 09:40 AM
Ford 460 Tune up Orchardhill Class A Motorhome Discussions 3 08-10-2010 03:32 PM
Ford V-10 Check Engine Light Tommurphy101 MH-General Discussions & Problems 3 07-22-2008 06:02 PM
Ford SuperDuty Engine Woes ChiefJohn Trailer Towing and Tow Vehicles Discussion 14 03-01-2007 04:25 PM
Very Hard Starting 460 Ford Only When Cold Tom Norman MH-General Discussions & Problems 8 04-14-2005 11:53 PM

» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 11:02 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.