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06-05-2016, 11:01 PM
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#1
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Junior Member
Join Date: Jan 2015
Posts: 16
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Jumping fuel guage
I have a 2005 holiday rambler ambassador and I have been experiencing the fuel gauge jump or should I say fall reading a quarter tank less then what is in the tank. It will jump back up to the more correct fuel level but it wont stay their long. Most of the post I've read about fuel gauge problem are they are pegged full or empty not jumping up and down. Does anyone have any ideas?
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06-06-2016, 04:53 AM
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#2
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Moderator Emeritus
Country Coach Owners Club Appalachian Campers Gulf Streamers Club
Join Date: Mar 2000
Location: Chattanooga, Tn.
Posts: 12,060
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Hello and  We are glad to have you join us here and we look forward to reading of your adventures and experiences. I am sure you will enjoy our website and forums. Good luck, stay safe and keep us posted.
Sounds like a bad sending unit in the tank.
__________________
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7
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06-07-2016, 07:30 PM
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#3
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Senior Member
Newmar Owners Club Winnebago Owners Club Freightliner Owners Club
Join Date: Mar 2016
Location: Kingman Az
Posts: 1,686
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Quote:
Originally Posted by RV Wizard
Hello and We are glad to have you join us here and we look forward to reading of your adventures and experiences. I am sure you will enjoy our website and forums. Good luck, stay safe and keep us posted.
Sounds like a bad sending unit in the tank. |
what chassis?
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May your black water hose never break!
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06-07-2016, 09:42 PM
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#4
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Junior Member
Join Date: Jul 2013
Location: Miami. Florida
Posts: 10
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I had this problem on my 05 Cayman had to replace sending unit.
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06-07-2016, 10:24 PM
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#5
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Junior Member
Join Date: Jan 2015
Posts: 16
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its a roadmaster. I had a local mechanic tell me over the phone its probably the sending unit, so now I need to locate a source for one
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06-08-2016, 09:39 AM
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#6
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Senior Member
Monaco Owners Club
Join Date: Jun 2011
Location: CA
Posts: 4,485
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It's likely the sending unit but before you replace it be sure the grounding wire is sound. I had issues with my tach jumping around and I never did trust the fuel gauge. I got in the habit of driving 5-600 miles on a tank and would start looking for a fuel station. but my main concern was fixing the tach. I cleaned all the ground wire connections and fixed the tach. As an extra bonus, the fuel gauge is working as it should also.
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Bill & Brigitte
06 Windsor PEQ, Cummins 400 ISL
2014 Honda CRV or 2012 Jeep
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06-08-2016, 03:38 PM
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#7
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"Formerly Diplomat Don"
Newmar Owners Club
Join Date: Apr 2005
Location: Moorpark, Ca.
Posts: 24,116
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"Oregonglen"......You have a Centroid sending unit in your coach. When my 2005 Diplomat was new, the gauge was way off from full. I went through the procedure to adjust it and make it read more accurately. Somewhere around 2010, the gauge started acting up like yours. Centroid said it was either algae in the tank or my gauge was going bad. I knew it wasn't an algae issue. I readjusted the gage and it worked fine until I sold it in 2014.
You might try adjusting the gauge before replacing. The sending nit is typically located on the driver's side where the fuel door is located. On some Monacos, the fuel door is mounted in a bay door and opens. On others, the fuel door is mounted in a solid panel, but does lift up, buy removing two screws under the coach.
http://www.centroidproducts.com/moncal.htm
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Don & Mary
2019 Newmar Dutch Star 4018 (Freightliner)
2019 Ford Raptor
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06-10-2016, 02:44 PM
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#8
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Junior Member
Join Date: Jan 2015
Posts: 16
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Thanks all, for your help. I will let you know what I come up with for a fix if it's something other then a sending unit.
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06-10-2016, 06:49 PM
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#9
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Senior Member
Monaco Owners Club
Join Date: Jun 2014
Posts: 14,603
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I would also check the wiring connections on top of the sending unit, make sure they are clean and tight.
I adjusted my sending unit trying to make it read more accurately. It helped but it is still not correct.
I invested in a Silverleaf system which tracks fuel consumption, I find it to be very accurate. If I run the generator I have to estimate that usage but it is still better then the fuel gauge reading.
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Jim J
2002 Monaco Windsor 38 PKD Cummins ISC 350 8.3L
2005 Jeep Grand Cherokee w/5.7 Hemi
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09-01-2016, 10:46 PM
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#10
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Junior Member
Join Date: Jan 2015
Posts: 16
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sending unit
the problem was the fuel sending unit which I ordered from Monaco and it was over 300.00 I replaced it my self which took me about twenty minutes to change out and it's working perfectly. Thanks for all the help friends
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Linear Mode
