Go Back   iRV2 Forums > MOTORHOME FORUMS > Class A Motorhome Discussions
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 01-07-2016, 11:54 AM   #1
Junior Member
mjlayton's Avatar
Join Date: Jan 2012
Posts: 14
Question 96 Dolphin 7.4 Vortec no fuel pressure

We recently purchased this motorhome and began maiden voyage from Terre Haute, IN to Charleston, SC. Just inside TN we stopped at rest area, when we restarted ran very rough and died. Cranked fine would not fire. let it set for a few minutes, started and ran fine. Drove toward Knoxville for about 30 miles and decided to stop for our first fill-up. Started, ran poorly as before, died, and would not re-fire. Plenty of spark, bought starting fluid, it would fire right off with a little spray in the air intake. Anyone know what to check or have a part number for a fuel pump? We have it at a large truck shop, but they won't look at it for a couple of days

Mike Layton

mjlayton 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 01-07-2016, 06:12 PM   #2
Senior Member
Skip426's Avatar

Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 11,963
There have been many posts on the loss of fuel pressure, in the GM/ Workhorse chassis forum , due to the pump being overheated by return fuel, dumping down on the top of the pump.

Was the tank below 1/4 full when the problem first happened?

99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
Skip426 is offline   Reply With Quote
Old 01-07-2016, 08:47 PM   #3
Senior Member
mhbell's Avatar
Thor Owners Club
Ford Super Duty Owner
Georgie Boy Owners Club
Join Date: Feb 2011
Location: Ogden Utah
Posts: 438
Had the same thing happen to me

I had the same thing happen to me. The first thing to check is the fuel filter and the fuel pressure. Mine was located in the line at the tank on the motor home that I owned at the time. That was not the problem. It was the fuel pump, which was located in the tank. They checked the pressure at a port on top of the motor. I only had 6 lbs pressure and it should have been 60 lbs. $1,160.00 dollars including overnight air freight. This at a GM Dealers. Good luck.
2006 Four Winds Hurricane 31D, Steer Safe, CHF, 50 Amp Conversion, 3000 Watt Inverter, Toad is a 2007 Jeep Liberty Sport. Blue Ox Aladdin Tow Bar, Apollo Braking System
mhbell is offline   Reply With Quote
Old 01-08-2016, 07:48 AM   #4
Senior Member
Join Date: Feb 2010
Posts: 4,282
Could be bad pump or supply.

Since it runs fine until stopped then faults and clears on retry get a voltmeter and check voltages.

If yiu can find a fuse for it and your meter has a 10 amp position lift the fuse and check current to pump.

It could be a sticking motor$$$$ Or a funny connection $ and lots of work
Tony & Lori
1989 Country Coach Savannah SE
TQ60 is online now   Reply With Quote
Old 01-08-2016, 10:07 AM   #5
Senior Member
Rbhein's Avatar
Join Date: Feb 2012
Posts: 154
Once had the same problem with the exact same RV. Mine was caused by a pinched wire going to the in-tank fuel pump. The wire was pinched between the tank and the frame. The fix was not too expensive. But it took a little time to track it down.
Rbhein is offline   Reply With Quote

dolphin, fuel

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
Fuel line to Gen Issue Airthug RV Systems & Appliances 7 11-25-2015 01:04 AM
Fuel Pressure Specification winnie32v Ford Motorhome Chassis Forum 2 04-18-2015 10:30 AM
Dolphin DP fuel solenoid wiring Panheadguy National RV Owner's Forum 1 04-01-2015 09:01 PM
Workhorse 8.1 Is this the fuel pressure test port? Photo Full.Monte Workhorse and Chevrolet Chassis Motorhome Forum 38 10-28-2014 07:43 AM
W22 2004 Vortec 8.1 Fuel Pump pressure DAS1M Workhorse and Chevrolet Chassis Motorhome Forum 9 02-21-2014 05:28 PM

» 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 05:37 PM.

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