Community Forums

Mr Plymouth · 02-01-2019, 02:10 PM

I have a 1997 Damon Intruder ,Ford F53 460 Engine.There is no fuel comming from the pump.Switched the relays around checked the fuses under the hood ,with no luck.Im wondering how hard it is to change the fuel pump and if anyone has made a trap door inside the coach under the bed and changed the pump from there .Im not sure were the pump would be . Any ideal would be great .Thanks for any help

Bob_C · 02-01-2019, 03:39 PM

If it's not on the motor, it's in the fuel tank...If fuel injected, it's in the tank, and there's a fuel filter on the tank side frame rail..just googled it, it's in the tank...Rock Auto might be a source, if you can wait for it...

theoldwizard · 02-01-2019, 06:03 PM

Before doing anything, you need to confirm the fuel pump is really dead.

Open the gas cap, lace you ear close to the opening and have someone cycle the key from OFF to ON. You should be able to hear the pump run for 5-10 seconds.

Assuming you do not hear it, you need to have some one get underneath and disconnect the electrical connection at the tank. Determine which in is the fuel pump power and which it the ground. (Not 100% certain, but I believe power is pink/black and ground is brown/white.) DO NOT USE A MULTIMETER TO CHECK FOR POWER ! Use an old fashioned incandescent test light. Better yet, use a head lamp bulb and make your own test light (this will draw about 4A and prove the the wiring is capable of actually driving the pump.) Cycle the key from OFF to ON. You should get a bright light for 5-10 seconds. If not, there is a problem in the wiring.

If you do get a light, then yes, you like have a bad fuel pump.

Mr Plymouth · 02-01-2019, 07:05 PM

Quote:

Originally Posted by theoldwizard

Before doing anything, you need to confirm the fuel pump is really dead.

Open the gas cap, lace you ear close to the opening and have someone cycle the key from OFF to ON. You should be able to hear the pump run for 5-10 seconds.

Assuming you do not hear it, you need to have some one get underneath and disconnect the electrical connection at the tank. Determine which in is the fuel pump power and which it the ground. (Not 100% certain, but I believe power is pink/black and ground is brown/white.) DO NOT USE A MULTIMETER TO CHECK FOR POWER ! Use an old fashioned incandescent test light. Better yet, use a head lamp bulb and make your own test light (this will draw about 4A and prove the the wiring is capable of actually driving the pump.) Cycle the key from OFF to ON. You should get a bright light for 5-10 seconds. If not, there is a problem in the wiring.

If you do get a light, then yes, you like have a bad fuel pump.

Thanks for your reply.I listened to the fuel pump earlier today and coudn,t hear anything .Also removed the filter to install a new one ,no fuel at all comeing from pump.i will check the wireing .also i may install an inline high output electric fuel pump .thanks again Paul

twinboat · 02-01-2019, 07:17 PM

There should also be roll over switch, that cut power to the pump, under the dash.

It has a reset button on it.

Mr Plymouth · 02-01-2019, 07:42 PM

Would it be on the steering column.Thanks

twinboat · 02-01-2019, 07:52 PM

Under the dash, maybe passenger side.

Nick-B · 02-01-2019, 11:15 PM

If you determine that it is a dead fuel pump, here is all the info you need in this thread. Just scroll to the last message.

http://www.irv2.com/forums/f258/1996...mp-423558.html

Mr Plymouth · 02-02-2019, 06:42 AM

Thank you .Nick B do you think it is possible to cut a trap dr under the bed to change the fuel pump.

theoldwizard · 02-02-2019, 06:45 AM

Quote:

Originally Posted by Nick-B

If you determine that it is a dead fuel pump, here is all the info you need in this thread. Just scroll to the last message.

http://www.irv2.com/forums/f258/1996...mp-423558.html

That will take you to this. The picture are well worth reviewing !

Quote:

Originally Posted by Nick-B

This post has excellent pictures about dropping the tank and replacing the pump as well as suggestions on replacing the fuel hoses.
http://www.irv2.com/forums/f23/f-53-...res-75723.html

theoldwizard · 02-02-2019, 06:53 AM

Quote:

Originally Posted by Mr Plymouth

Also I may install an inline high output electric fuel pump

Quote:

Originally Posted by Mr Plymouth

Do you think it is possible to cut a trap door under the bed to change the fuel pump.

I would NOT do either of those short cuts !

Dropping the tank is not that hard, once you empty the tank ! Start a day early and spray the tank strap bolts with penetrating oil. Do this a couple of time over the next 24 hours.

Once you have gotten as much fuel as possible out of the tank, use a floor jack and a piece of plywood about 2'x3' under the tank. Remove the bolts and the filler pipe and slowly let the tank down. Remove the hose(s) and electrical connector. If you did NOT do the electrical test I mentioned before NOW IS THE TIME TO CONFIRM YOU REALLY HAVE 12V GOING TO THE PUMP !

From those other pictures, that looks like one of the EASIEST fuel tanks to drop that I have ever seen !

Jim_HiTek · 02-02-2019, 08:46 AM

No need to drop the tank. Just get an external fuel pump. I used on one on my diesel Class A with no problems for 12 years. Race car drivers use them all the time. They've been around probably as long as in the tank pumps have.

Saves quite a bit of money too. Might have to buy some minor brass plumbing and some fuel hose too but it's not expensive plus it's an easy job. In tank fuel pumps are typically designed to have fuel pulled through them. You just put the pump in the hose near the outlet from the tank and use the same electrical connections.

Summit Racing has a pretty good selection: External Fuel pumps

High pressure external pump...

Dav L · 02-02-2019, 08:58 AM

Don't forget that the major reasons pumps fail is due to dirt in the tank. If you don't remove the tank, you can't clean it.
The trap door is way more work than what it's worth. Pulling a tank is a pain, but it's not all that bad. You will also drop more dirt in the tank servicing the pump if the top of the tank isn't cleaned.
Exterior pump would work if the old pump will allow for fuel passage. But it still doesn't fix the dirt issue.

The right way is to confirm the pump is bad (apply 12v and ground direct to the wire harness that directly goes to the pump which eliminates all other electric issues), buy the replacement pump, dump the fuel, raise the coach high enough to drop the tank, ensure you have good jack stands / timbers under the chassis, drop the tank, clean it externally, remove the pump, clean the tank internally, replace the pump, replace the tank, hook it up, fill and go. This is about four hours of work.

A thump on the bottom of the tank might jar the old pump to start pumping again. That will confirm you have a suspect pump but might get you to a good servicing location.

twinboat · 02-02-2019, 10:06 AM

Quote:

Originally Posted by Dav L

Don't forget that the major reasons pumps fail is due to dirt in the tank. If you don't remove the tank, you can't clean it.
The trap door is way more work than what it's worth. Pulling a tank is a pain, but it's not all that bad. You will also drop more dirt in the tank servicing the pump if the top of the tank isn't cleaned.
Exterior pump would work if the old pump will allow for fuel passage. But it still doesn't fix the dirt issue.

The right way is to confirm the pump is bad (apply 12v and ground direct to the wire harness that directly goes to the pump which eliminates all other electric issues), buy the replacement pump, dump the fuel, raise the coach high enough to drop the tank, ensure you have good jack stands / timbers under the chassis, drop the tank, clean it externally, remove the pump, clean the tank internally, replace the pump, replace the tank, hook it up, fill and go. This is about four hours of work.

A thump on the bottom of the tank might jar the old pump to start pumping again. That will confirm you have a suspect pump but might get you to a good servicing location.

Dirt is the major reason fuel pumps fail ?

How is dirt in the tank damaging the fuel pump ?

The pickup tube is off the bottom of the tank and covered with a filtering sock. In many systems that's the only filter.

Is say old age, and then defective replacement, are the major reason for failure.