Go Back   iRV2 Forums > MOTORHOME FORUMS > MH-General Discussions & Problems
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
  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 07-12-2012, 03:01 PM   #1
Junior Member
Join Date: Jul 2012
Posts: 1
Workhorse with loss of power - intermittent.

P32 workhorse - 2000 chevy 454 7.4L V8

For over a year now I have had issues with an intermittent loss of power. This seems to occur at the 3 hr mark when traveling in hot weather, there is a noticeable difference in heat near the dog house, however the engine temp doesn't change.

On my last trip from Arizona to Colorado - (mostly hills) the coach was running fine and then at approximately 2.5 hrs a loss of power. Doesn't miss fire, rpm's can still be increased with no reaction - an occasional feeling of power, but unable to maintain adequate speed. This only seems to happen after traveling in hot weather. Due to it being Sunday we found an RV park and stayed the night. Next morning coach was fine for about 2.5 hrs then experienced loss of power again. We made it to our destination and decided to leave home at night for cooler temps hoping the motorhome would run fine. No issues while driving in cooler temperature.

I have read a lot of forums with solutions ranging from heat shielding the ECM and possible issues with hot fuel returning to the fuel pump or vapor lock. My mechanic has taken the coach out for two hours with no change in fuel pressure and cannot get issues to repeat. We have changed plugs, wires, distributor, and cleaned the fuel injectors with no resolve - last year when issues first occurred. No codes displayed.

Can anyone shed some light to this issue?

maplet564 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 07-12-2012, 04:18 PM   #2
Senior Member
Ford Super Duty Owner
Join Date: Jan 2011
Location: Kitts Hill, OH
Posts: 1,822
Maybe the fuel tank vent is part way plugged and running is
Creating a vacume in the tank?
You siad you noticed the dog house got hotter but you also
Noticed the engine didn't get hotter.
I say the engine did get hotter and your dash temp
Gauge is not seeing the higher temps. On my vehicles
Back then there 2 temp sending units. One for dash gauge and
The other for the engine computer. Also on many newer EFI
Engines if you get into a overheat situation the ECM will pull
Back timing and fuel to help cool the engine.

(RVM#26) THE U-RV 94 F-700/24 foot U-haul box home built RV
Mekanic is offline   Reply With Quote
Old 07-13-2012, 08:41 AM   #3
Senior Member
Doug Sage's Avatar
Winnebago Owners Club
Workhorse Chassis Owner
Join Date: Mar 2001
Location: Originally from near Portland, OR
Posts: 699
This is probably not your issue but I just had a problem with a partially clogged fuel filter that caused intermittent power reduction. I noticed it when I climbed the Wasatch Mountains out of Salt Lake City in the heat. Replacing the filter seems to have solved the problem.
Doug Sage
Full timers roaming the good old US of A
2007 Itasca Suncruiser 38J
2015 Jeep Cherokee Trailhawk
Doug Sage is offline   Reply With Quote
Old 07-13-2012, 10:01 AM   #4
"Formerly Diplomat Don"
Dutch Star Don's Avatar
Newmar Owners Club
Join Date: Apr 2005
Location: Moorpark, Ca.
Posts: 7,200
Does this unit have a catalytic converter? If it does, it may be getting plugged and then cooling off. It would also explain the heat increase.
Don & Mary
2014 Newmar Dutch Star - All Electric - 450 ISL
2016 GMC Canyon 4WD Crew Cab
Dutch Star Don is offline   Reply With Quote

power, workhorse

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

» Virginia Campgrounds

Reviews provided by

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 07:43 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.