Big Katuna
Deland, FL
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It would be interesting if everyone would include the length of their RV.
My Kharma ran over my Dogma.
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rvrepairnut
bc
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Joined: 11/11/2011
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Big Katuna wrote:It would be interesting if everyone would include the length of their RV.
why same fuel pump
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John&Joey
Some Location
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Joined: 05/20/2007
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33 ft 96 F53 460. Drive south for the winter, and north for the summer each year for the last 4+ years.
Pump failed within a year for the original owner. He replaced it with new pump and wiring harness. No problem since. I have noticed that the injectors like to clog. Use SeaFoam often, and whenever I'm going to be parked for 2+ months.
More then likely you have the new pump after all these years and miles. You would be better off replacing the fuel filter every year, then wondering about the pump failing. Remember at 5-10mpg that filter pushes a lot of fuel in a very short amount of time.
If you want to be pro-active start looking more at your brake system. This is the weak part on an older F53 when you're on the road. Grease the slide pins and change the fluid to lessen "brake  " downs. Otherwise you'll be doing this:
Instead of this:
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Dutch_12078
Great Sacandaga Lake, NY
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Big Katuna wrote:It would be interesting if everyone would include the length of their RV.
For that to be relevant, you would also have know if the fuel tank was moved back when the frame extensions were added. Not all were...
Dutch
1995 Coachmen Catalina 322QBXL
F53 chassis, 460 V8, TST TPMS
Quadra Bigfoot EZE Levelers
2011 Toyota RAV4 4WD/Remco pump
ReadyBrute Elite tow bar/Blue Ox baseplate
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topflite51
In The Desert of Nevada
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Joined: 05/13/2004
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The fuel in the tank helps keep the pump cooler, those who drive on the top half of the tank have fewer issues with the pump. This is especially true in HOT weather.
 David
Just rolling along enjoying life
w/F53 Southwind towing a 87 Samurai or 01 Grand Vitara looking to golf or fish
Simply Despicable 
Any errors are a result of CRS.
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John&Joey
Some Location
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topflite51 wrote:The fuel in the tank helps keep the pump cooler, those who drive on the top half of the tank have fewer issues with the pump. This is especially true in HOT weather.
That's a good point topflite, but here's a question. That should be the same pump that is in a Ford passenger car. Now if you have a 80 gallon tank and it's 1/4 full you still have 20 gallons of "cooling." Which is way more then most ford passenger cars.
Am I missing something here?
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ryanallie1
Magalia, Calif
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Hi All.
Good Question. Our 1998 Rexhall, is sitting on a 1997 F-53 Chassis with the 460 EFI.
It has had two past owners so far, beside us. So we have no idea of if the Fuel Pump has been replaced or not, NO way of looking at anything either.
So if in fact it is the OEM Fuel Pump, its still working fine, for now anyways.
I have a very bad back, so I stop about every two hours or so, and get up and walk around for a bit. While I do this, I also try and refuel whenever possible, since I need to stop anyways. Its pretty rare for us to go below a 1/2 a tank of fuel.
Don't really know if that really hepls or not. I guess time will tell in the end. Either it will give us problems, or maybe one of the past owners had it changed out ?
We also allow our 460 EFI Engine time to cool down after running on the Freeways, before we sut it down. So far, we haven't had any issues with Manafold Leaks either, or Broken Bolts.
Good Luck. Happy Travels. Dan & Jill
Good Luck. Happy Travelss. Dan & jill
1998-33.5 Rexhall, Rexair SL. 460 EFI. F-53. 7.3 MPG. TST TPMS. HWH Levelers. 5.5G Gen. Convection/Microwave Water Purifier/Water Softner. 2 A/C's. Alarm Systems. Honda EU2000i's W/Kit. Steer-Safe. CR-V W/SMI System. FMCA #F414397 Nam-Vet, 66-67-68&70-71
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hohenwald48
Hohenwald, TN
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John&Joey wrote:topflite51 wrote:The fuel in the tank helps keep the pump cooler, those who drive on the top half of the tank have fewer issues with the pump. This is especially true in HOT weather.
That's a good point topflite, but here's a question. That should be the same pump that is in a Ford passenger car. Now if you have a 80 gallon tank and it's 1/4 full you still have 20 gallons of "cooling." Which is way more then most ford passenger cars.
Am I missing something here?
Yes you are. It's the depth, not the quantity, of the remaining fuel that provides the cooling.
2008 Fleetwood Jamboree 25G
1999 Jeep Wrangler
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topflite51
In The Desert of Nevada
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John&Joey wrote:topflite51 wrote:The fuel in the tank helps keep the pump cooler, those who drive on the top half of the tank have fewer issues with the pump. This is especially true in HOT weather.
That's a good point topflite, but here's a question. That should be the same pump that is in a Ford passenger car. Now if you have a 80 gallon tank and it's 1/4 full you still have 20 gallons of "cooling." Which is way more then most ford passenger cars.
Am I missing something here? 40+ gallons of cooling is considerably better than 20 gallons on a hot day, it takes considerable more time to heat 40 gallons up then it does 20, ergo the pump is cooler. Comparing a car's fuel pump and its demands on it to a MH's is not comparing apples.
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John&Joey
Some Location
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hohenwald48 wrote:John&Joey wrote:topflite51 wrote:The fuel in the tank helps keep the pump cooler, those who drive on the top half of the tank have fewer issues with the pump. This is especially true in HOT weather.
That's a good point topflite, but here's a question. That should be the same pump that is in a Ford passenger car. Now if you have a 80 gallon tank and it's 1/4 full you still have 20 gallons of "cooling." Which is way more then most ford passenger cars.
Am I missing something here?
Yes you are. It's the depth, not the quantity, of the remaining fuel that provides the cooling.
Physics would argue with you. If anything the cooling effect would increase since the surface area of the gas is greater thereby allowing more heat to transfer away from the liquid thereby allowing a more cool environment for the pump to operate in.
Also I'm not buying the idea that a MH fuel pump runs harder then a car or a truck. PSI is PSI regardless. How else would a 3/4 ton V10 truck pulling a 5'ver with a standard size gas tank handle it.
Would make for a good "Myth Busters" episode I guess.
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