Question about 1986 Ford Econoline

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Fuel pump wiring for a 1986 rv

I replaced the fuel pump and the  tank in my 1986 Honey rv. The one problem . The wiring harness is different. 4 prong and bigger than the old one. 3 prong. Im guessing it will still work. Any ideas? I think I would need a 4 prong clip with a jumper kit..

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Take that new pump out and install the correct one. Why would you install something that is not an exact match to what you removed??

Posted on Aug 03, 2010

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Posted on Jan 02, 2017

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Can't find fuel filter 1985 honey rv


TRACE the Fuel Line from the FUEL TANK to the ENGINE... GO SLOW and if there is a Fuel Filter, you will find it. If there is no Fuel Filter, then it is either part of the Carburator Screen or there is none

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My motorhome 1986 chevy honey wont start fuel pump has no power


is it class "a" or class "c"motorhome----was the unit in a accident--check inertia switch

Nov 08, 2012 | Cars & Trucks

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I have 1986 Alfa Spider that won't start. Car has been sitting for a year. I replaced battery, fuel tank, fuel sender unit, both fuel pumps. I seems that the in tank pumps is not getting any po


Could be the main or fuel run relay located in the compartment under the luggage rack, passenger side, main relay also, fuse for the fuel relay 8amp. Electronic Control Unit is also located there.

Could be electrical, Hook up a timing light, three leads: Power, Ground, and one that goes around the wire to #1 cyl. Turn the engine over and see if there's firing. Note: u can check all 4 spark plugs this way.

Fuse lead goes to pin 30 of the fuel relay, u can jump 30 across to 57 and check for the pumps running, if not, change-I suggest both relays, main and fuel run relays. Both pumps get their 12v DC from the fuel run relay, both should be running when you switch ignition switch to on, then a tachymetric signal is fed from the coil to the relay to keep it running.

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1 Answer

I have a 1995 Ford F-150 with a 300 six, it has a full ffront tank and runs like it's running out of gas, I switch it to the rear tank, it runs fine.How do I fix it?


You probably have a bad fuel pump in the front tank. There are other possibilities as well. I have replaced tank switches for this reason also. You need to check for power and ground at the front tank when the switch is in the front tank position and the ignition switch is turned on.

At the wiring connector that goes up to the tank, (on the frame rail next to the tank) the power wire is the RED wire and the ground wire is the ORANGE wire. (The other wires are for your fuel gauge.)

The fuel pump relay will supply voltage to the RED wire for only about 2 or 3 seconds (to prime the fuel rail) when the ignition switch is turned to the ON position, so you will need a helper to check this.

If there is no power, then you should suspect the switch. However, check for power at the switch to verify that it is the switch and not a broken wire between the switch and the tank connector.

If power and ground are both present at the tank connector, replace the front fuel pump.

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Im working on a 1986 toyota pickup 2.4l efi non turbo 4x4 i replaced the head gasket and i have a black wire coming from the intake wiring harness that has no plug on it .if i touch this wire to a hot wire...


Sounds like this wire should operate the electric fuel pump through the fuel pump relay.The fuel pump relay should start the fuel pump to maintain fuel supply to the common fuel rail and any surplus fuel will be bleed back to tank by pressure control.The injector opening sequence is contolled by computer once the engine is properly timed.
If you say the engine runs for a few seconds it would indicate fuel pump or relay is not getting power to operate or fuel pump is not delivering enough pressure to feed the injectors

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1 Answer

My 1986 ford econline RV has fuel problems it starts and run's but acts like fuel pump I replaced the fuel pump in the tank and the fuel filter. It acted up before and I let it sit and it ran fine for...


take a look at the two relays on the top of fender sheild, these go bad alot,one is for the ecm and the other for the fuelpump,start there and also you may want to check to see what is not happening like spark or fuel

Jun 09, 2010 | 1986 Ford Econoline

1 Answer

86 F250 w/ 460 auto. I have no fuel to carb. I have no power to fuel pumps. I have checked & reset inertia switch, nothen. I have found no fuses for pumps or a relay. The only relay r trailer tow. I...


The age 1986 warrants a fuel pump replacement. Check for rodent damage in the fuel tank harness area when you install new pump. Also change the fuel filter.

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Where is the fuel pump fuse located on a 92 3.1?


It's probably under the hood. There may be a fuse box near the battery but that fuse is probably behind a cover behind the engine, near the top of the firewall.

Sep 16, 2009 | 1990 Chevrolet Camaro

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Birning the fesue for the fuel pump


You could have a short in the wire harness to the fuel pump or the fuel pump it self is bad or the relay has gone bad also. Start with the replacement of the fuel pump relay and also find the wire harness to the fuel pump sending unit from the frame to the gas tank and disconnect the connections. If the fuse does not blow when the connection to the fuel pump is disconnected, then it's a go chance that it's the fuel pump. If the fuse blows and the wire harness is disconnected, then the problem is towards the fuel pump relay and fuse block. Good luck and keep me posted, be glad to help you get your car running 100% again. 

Jul 27, 2009 | 2003 Kia Rio

1 Answer

Econoline fuel problem, One tank works better than the other


i would put a fuel gauge on it and check to see if it good or not, your frame pump is what give the engine exactly what it needs. The tank pump only provides fuel to the frame pump. So if the tank supply pump was not working, you would not have any fuel.

Jul 09, 2009 | 1986 Ford Econoline

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