Go Back   iRV2 Forums > THE OWNER'S CORNER FORUMS > Alpine Coach Owner's Forum
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
 
Thread Tools Search this Thread Display Modes
 
Old 02-01-2006, 04:22 PM   #1
Senior Member
 
Stretch's Avatar


 
Join Date: May 2004
Location: cayucos, ca
Posts: 1,129
I think we broached this subject some months ago. However I have a specific problem that has plagued both Alpines we have owned, ( an 00 and 03). If the generator has not been used for a week or so, when I start it, it runs for max 2 minutes and stops. Trying to restart wont work unless I prime for a long time (2 minutes at least) then it starts by running on 1 then 2 then all three cylinders. obviously it lost fuel prime and was starving for fuel. I have called the Onan dealer and (over the phone)they think it is a leak in the supply line. I have my doubts because I carefully checked every connection on the 00 Alpine and found nothing. Anybody else having the same problem? Were you able to get it fixed? And if so, what was the problem?
__________________

__________________
Ross Starkenburg
2017 Newmar Dutch Star 4369. Spartan chassis w/full disc brakes. 2015 Jeep Grand Cherokee toad
Stretch 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 02-01-2006, 04:22 PM   #2
Senior Member
 
Stretch's Avatar


 
Join Date: May 2004
Location: cayucos, ca
Posts: 1,129
I think we broached this subject some months ago. However I have a specific problem that has plagued both Alpines we have owned, ( an 00 and 03). If the generator has not been used for a week or so, when I start it, it runs for max 2 minutes and stops. Trying to restart wont work unless I prime for a long time (2 minutes at least) then it starts by running on 1 then 2 then all three cylinders. obviously it lost fuel prime and was starving for fuel. I have called the Onan dealer and (over the phone)they think it is a leak in the supply line. I have my doubts because I carefully checked every connection on the 00 Alpine and found nothing. Anybody else having the same problem? Were you able to get it fixed? And if so, what was the problem?
__________________

__________________
Ross Starkenburg
2017 Newmar Dutch Star 4369. Spartan chassis w/full disc brakes. 2015 Jeep Grand Cherokee toad
Stretch is offline   Reply With Quote
Old 02-02-2006, 10:55 AM   #3
Senior Member
 
VAGABONDMAN's Avatar
 
Alpine Owners Club
Join Date: Mar 2005
Location: YAKIMA
Posts: 166
I have experienced the same problem on my '03: it happens whenever I have run the fuel tank down below 1/4 full. My conclusion is that the fuel runs back into the tank and we lose prime. It's a big nuisance and I have no suggested fix.
__________________
Frank Rouse

Vagabondman
VAGABONDMAN is offline   Reply With Quote
Old 02-02-2006, 12:49 PM   #4
Senior Member
 
Jim A's Avatar
 
Join Date: Jun 2005
Posts: 1,376
Vagabondman might be on to something there. I rarely let my fuel tank drop below 1/4 (I never trust gas guages very much), and I have never experienced the described problem with the generator. My generator has often sat idle for weeks, and has not had the problem when I finally start it up.
__________________
Jim A
'04 Alpine Coach 36' MDDS
Jim A is offline   Reply With Quote
Old 02-02-2006, 01:30 PM   #5
Senior Member
 
Join Date: May 2004
Location: Auburn, CA, Havasu, AZ & Mulege, BCS
Posts: 5,217
Could try adding a low pressure check valve fitting near the tank; that'd minimize the volume of air accumulating in the line.
My experience w/diesels is that a small volume of air can be introduced into the Injection Pump & run thru w/out substantial trouble (it mostly gets pushed back to the tank in the fuel return line @ top of IP), but a lot will break the continuity of fuel reaching injectors and thereby shut down the motor.
__________________
Baja-tested '08 2-slide 36'
Alpine: The Ultimate DIY'er Project
EngineerMike is offline   Reply With Quote
Old 02-02-2006, 03:53 PM   #6
Senior Member
 
Stretch's Avatar


 
Join Date: May 2004
Location: cayucos, ca
Posts: 1,129
Hi Mike: I tried a check valve on our OO 40fdts. It suffered the same problem and the check valve did no good..........
__________________
Ross Starkenburg
2017 Newmar Dutch Star 4369. Spartan chassis w/full disc brakes. 2015 Jeep Grand Cherokee toad
Stretch is offline   Reply With Quote
Old 02-02-2006, 03:56 PM   #7
Senior Member
 
Stretch's Avatar


 
Join Date: May 2004
Location: cayucos, ca
Posts: 1,129
Thanks vagabond man:
Mine will fail at any fuel level. That is if I do not use the gen for several days
__________________
Ross Starkenburg
2017 Newmar Dutch Star 4369. Spartan chassis w/full disc brakes. 2015 Jeep Grand Cherokee toad
Stretch is offline   Reply With Quote
Old 02-03-2006, 09:31 AM   #8
Senior Member
 
Join Date: May 2004
Location: Auburn, CA, Havasu, AZ & Mulege, BCS
Posts: 5,217
Stretch- Thanks for plowing the row on the check valve. I wonder if the gen has a lift pump; sounds like not, and that it could benefit from 6psi or so constant fuel pressure to the IP when activated. In pick-up diesels, the IP can pull fuel at idle sufficiently so no performance issues are notable. But at speed, the IP can't pull enough fuel to avoid engine fuel starvation.
__________________
Baja-tested '08 2-slide 36'
Alpine: The Ultimate DIY'er Project
EngineerMike is offline   Reply With Quote
Old 02-03-2006, 12:37 PM   #9
Senior Member
 
Stretch's Avatar


 
Join Date: May 2004
Location: cayucos, ca
Posts: 1,129
Hi Mike:
Well I know the QD generator has an electric pump, cause I ca hear it running. I dont know if the injector pump has a mechanical pump also. But my system is getting air somewhere, In other words the line should be ful of fuel all the time. It is not, cause the engine wont start. If its not fuel in the line, what is it. got to be air,,,,,,,,,,
__________________
Ross Starkenburg
2017 Newmar Dutch Star 4369. Spartan chassis w/full disc brakes. 2015 Jeep Grand Cherokee toad
Stretch is offline   Reply With Quote
Old 02-03-2006, 04:35 PM   #10
Senior Member
 
Join Date: May 2004
Location: Auburn, CA, Havasu, AZ & Mulege, BCS
Posts: 5,217
Stretch- Its two different things to have air because of leak-back to the tank, and to have air because the line or fittings leak. The former you can solve w/a search & destroy effort following the line; the latter takes a different tactic (I'd start w/a complete one-line diagram for the gen fuel system, then stare at it till thought I had all possible failure causes listed, then attack them based on cheap & easy first).
__________________
Baja-tested '08 2-slide 36'
Alpine: The Ultimate DIY'er Project
EngineerMike is offline   Reply With Quote
Old 02-03-2006, 09:01 PM   #11
Senior Member
 
Stretch's Avatar


 
Join Date: May 2004
Location: cayucos, ca
Posts: 1,129
I will respectfully disagree. There is no way for the fuel to leak back into the tank UNLESS there is air getting into the lines somewhere. A vacuum is what keeps the fuel line full. If air gets in.....no vacuum...then the fuel can leak back to the tank. But where is the leak? I cannot find it. Perhaps it is a defective component in the fuel system leading up to the injector pump? I am stumped.
__________________
Ross Starkenburg
2017 Newmar Dutch Star 4369. Spartan chassis w/full disc brakes. 2015 Jeep Grand Cherokee toad
Stretch is offline   Reply With Quote
Old 02-04-2006, 05:33 PM   #12
Senior Member
 
Join Date: Aug 2004
Posts: 437
I'd bet the feed line between the pump and the tank or input side of the pump has a slight leak. If it is very slight, you might not notice fuel but after there is enough time for it to settle, it could slowly return to the tank whild 'sucking' air in the line to replace the fuel. If it is very slow there would not be enough time for much fuel to return to the tank when the gen is turned off for a short time. Setting days would allow time for enough air to enter.
__________________
Steve
'01 Alpine 36 FDDS
SteveS is offline   Reply With Quote
Old 02-04-2006, 07:55 PM   #13
Senior Member
 
Stretch's Avatar


 
Join Date: May 2004
Location: cayucos, ca
Posts: 1,129
I'm with you Steve, but I cannot find the leak so far. I was hoping someone out there had had a similiar congenital problem and could point the way.
__________________

__________________
Ross Starkenburg
2017 Newmar Dutch Star 4369. Spartan chassis w/full disc brakes. 2015 Jeep Grand Cherokee toad
Stretch 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
Caterpillar is stopping CAT engine production AKBrick Caterpillar Engine Forum 1 02-17-2009 07:18 AM
Slide Out Stopping CSX4350 Newmar Owner's Forum 9 01-15-2009 07:13 AM
DTV $10.00, 10 minutes Don The Ham Technology: Internet, TV, Satellite, Cell Phones, etc. 13 06-19-2008 06:06 AM
stopping along the way. Bushman512003 Boondocking 20 03-23-2006 07:05 PM
Dash AC quits after a few minutes ronboc Workhorse and Chevrolet Chassis Motorhome Forum 10 10-06-2005 06:10 AM

» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 08:57 AM.


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