Ford Dual Fuel Tank Problems...Front Tank Overflows

[@bafarrell82]

This is happening to my truck!! Thanks for this video. Probably saved hours of my time!

[@dancingwithczars]

This has been a long standing problem that Ford has ignored. They issued recall on 1990-93 dual tank systems, but refuses to admit the problem continued to later years, and issue a recall for those years as well.. My 1996 F150 XL 4.9L with dual tanks has this exact problem. Ford is a real scumbag company for ignoring this. Sounds like a good class action lawsuit.

[@RAF-FIG]

GREAT TRN aid:.. I just finished my REAR TANK on my F-150... However , it was my REAR TANK that went TITS UP.... THANKS!

[@angelab8580]

This is one of the best videos ever! Great job. Thanks for showing details.

[@64maxpower]

That's a solution for every Ford pickup truck owner. We need to have a spare parts truck to keep our main truck running. I've worked on my F250 more in 4 months then I did in 19 years of owning my Toyota

[@darronvon]

best video on the ford fuel system and problem that I am having thanks.

[@mrpistonrecaro6483]

Mines started overfilling the front tank after installing a new pump motor only on rear tank.i didn't know about the check valve on the module. Otherwise I replace both complete modules. It a pain. Well done ford

[@WillsGarage91]

Yup in order to replace the check valves you need to replace either the pump module or the complete sending unit assembly as I did.

[@markdudgeon3997]

You can splice the return line on the frame rail and install an external check valve... shop.advanceautoparts.com/p/dorman-oe-solutions-fuel-check-valve-5-16-800-195/10611403-P?searchTerm=check+valve+fuel

[@craphittingthefan9445]

Most of these ford trucks 1987-96, the fuel selector valve gets sticky and over fills the front tank, I am surprised the repair done in this video fixed the problem

[@WillsGarage91]

The frame mounted selector valve was only used from 87-89. From 90-96 the tank switching was done in the fuel pump module.

[@jimmermania32]

@@WillsGarage91 hit right on the head. There is no "selector valve" after 1989. Just the in-tank modules. Best to replace the entire module. Always replace the module on the tank that is overfilled. This indicated that tank's check valve is blown and thus allowing it to overfill from the other tank.

[@cbmech2563]

Not on a power stroke, no fuel pump in the tanks

[@pepito93636]

@@jimmermania32 where is the check valve located? I'm having this problem now

[@thomassevers2920]

@@WillsGarage91 I have a 81 with the selector valve on the frame!

[@timreaves88]

That truck is very nice Mines all banged up

[@MikeandTracker]

Thanks! I have been pulling my hair out with my 94!

[@danielbell4007]

Having a similar issue with my truck. Just started as far as I can tell. The rear tank on mine is overflowing, but I haven’t used it in forever, because my rear fuel pump doesn’t work.

[@dominicradford5816]

What did you do to fix it? Mine is doing the same

[@danielbell4007]

@@dominicradford5816 had to replace the tank

[@zachkenton7476]

I believe that’s my issue with my truck. A master tech. at my work was explaining that a bad selector valve goes bad it can cause long cranks and over flow tanks.

[@hunterwooldridge9024]

Zach Kenton Do you know where the Tank Selector Valve is? I have a 1991 F150 and I am experiencing the same problems but I cannot find the tank selector valve

[@hunterwooldridge9024]

FRED MASSE I found out that the Tank Selector Valve is not on 1990’s or newer, so my truck doesn’t have it but I appreciate the help anyway

[@gordonarkell]

This is happening to my '97 f350, overflowing from the rear tank. Scary. Can you send a link to the fuel pump outlet check valve part?

[@pex_the_unalivedrunk6785]

I have a 1991 F-150 xlt lariat with 5.0 V-8 & 5 speed overdrive manual transmission and dual fuel tanks. Since i bought it a few weeks ago i have only been filling only the front tank and the average gas mileage seems to be about 7mpg(i expected to get around 12 mpg). Is it possible for the front tank to vent fuel into the rear tank while driving and explain my problem??? Also the exhaust smells terrible...hint? I'm new to this type of truck, but have a general understanding of auto-mechanics so any insight would be appreciated.

[@erinshaw9702]

Thanks for the video! Very helpful, much appreciated!

[@jarrettknipp5147]

The problem is with your front fuel pump, when you order your new one make sure it has a built-in valve that will not let the back tank fill it when it is not on I have a 1994 Ford four-wheel-drive 4.9 L, I had this problem, and when you order the front tank it will come with a shut off valve made in it. Have a great day.

[@sionefinau7584]

1993 f350 5.8l just replaced rear tank fuel pump. The front tank pump needs replacement. Filled the rear with about 10gallons and ran for about 10min and fuel started spewing out the front tank filler neck. Gona replace the front tank fuel pump and hopefully that fixes that problem. Used to buy parts from Napa autozone and oreilly. Now I’m trying to be more careful where I get parts from. Trying motorcraft and 1aauto parts

[@GabrielDeleon-qj7bj]

Did getting the new one fix your problem?

[@davispruisman2516]

I had my front tank pump go out. It started to jump, sputter, and die in the first tank until after a week or so it would not start in the front anymore. I started to run off the rear only, and experienced the same problem with overflow out of the front. Now 2 months later, the rear pump is dying on me and acting like the front was previously. Would I need to change both pumps to not experience overflow? I assume the gas would run front to back or vise versa depending on which check valve/pump is bad? Also curious as to why both crapped out near the same time. Any advice appreciated.

[@awakeninfreedom]

got the same problema on my 1996 F150. how did you fix it?

[@justinriley2525]

I'm having the same problem but when I try to use the front tank it spits and sputters and wants to die out did you have the same issue as well? Andy advice would be helpful.at first i thought it was a clogged fuel filter or something till I found out it only has one filter for both tanks and the rear tank works fine.

[@josecordova7071]

I’m having this issue with my front tank on my 94 f150 would it be better if I just buy the whole new pump ?

[@timothylines3867]

I took mine to Tallahassee ford for the repair .3 days later they did not repair ,and bent the body was all they did. later I was told the bed had to be removed for the repair .I sold it .

[@crazedgoldminner7384]

And a similar thing happening I found out very quickly there's a small vent hole in the top of the front tank filler hose the rubber part so I changed mine to one without it and I have a vented cap so that doesn't affect it any but the other thing you need to wash there is a valve in there they say I cannot find a diverter off of mine some have just a high pressure pump and a backflow valve and no diverter valve on the switch to switch only controls which fuel pump is being operated so that can be kind of confusing for people too but yes the rear tank will siphon into the front tank and it's not a pretty picture

[@rickobrien4025]

That's the longest sentence I've ever read .

[@betavirus11]

Would this fix work on an 89? F150? Or juet 90 and above

[@brucebarrett8413]

Hello, I have a 92 F150 302. I've had it a couple of years from my father in law. I think there is probably some sludge in the tanks because i have to replace the fuel filter about every 6 months . Here is my problem. I noticed my rear tank was low on fuel and when i got out at my sons house it ran out of fuel and cut off. I then switched to my front tank and i started right up. I went and filled the rear tank and when i got home i smelled fuel. Well this kept smelling and then i noticed fuel pouring out at the rear axle. The front tank is pumping to the rear and the fuel just pours out. I assume the whole float assembly needs changed on the rear tank. All help appreciated!

[@richarddalby1534]

I understand you had a spare tank already, other than that, how much did the parts and work run you?

[@dirkgriggs3353]

Hey WIll great video - I've got a 1997 F250 with a 460 that is acting similarly i.e. front tank filling rear tank. I just had the front fuel pump replaced - rear fuel tank appears ok. I don't know if the mechanic crossed the return lines or if it is a check valve problem. It appears that the rear tank does not fill the front tank? I did notice that the rear tank overflowed when i removed the gas gas without ever adding gas to rear tank. Does anyone know if you don't fill the tanks all the way if it will act ok? So far it has but any help is greatly appreciated!

[@Genosisnt]

To be honest it sounds like the check valve in one of the two is failing, causing one of your tanks to send to the other. Does one of the tanks run bad and stutter and try to die out on you at all? Try to keep a siphon hose on you so that whenever it starts filling up too much you can take some out to prevent damage to your fuel lines.

[@Genosisnt]

I just did a little more research, you should get your fuel delivery module checked out in the front tank, seems like that makes the front tank send to the back.

[@dirkgriggs3353]

@@Genosisnt Thanks for your help - it looks like that is what is happening. The only one time it ran bad like that was when both tanks were completely full. Since then I fill the front and then switch to use up most of what is in the rear until i refuel the front (so it has a place to go) and it has run perfectly until I get it fixed.

[@riceski]

Please show the part #s Thanks. I have a similar problem and my mechanic says I need both pumps and both sending units The factory want's 1200 - and that's more than my 96 is worth me putting money into ------------- Are yours cheaper?

[@WillsGarage91]

I got a spectra premium complete assembly. No issues with it 2 months later. Part numbers will vary depending on tank size and number of tube ports in the top of the pump. What I'd do is get them from Rock Auto.

[@riceski]

I got mine at auto zone lint lifetime asked very nicely for mgr to hook me to saved 40.00 --- 400. For both. Called A1 auto from the web to get parts numbers then you have to take the bed off one side and loose on the other

[@Branden_Tarrant]

Great video. I'm having the same issues with my 96 F150. Did you experience any issues with the engine not getting fuel or jumping? Mine is dying on me when driving. I suspect the check valves are failing, but can't figure out why it's dying sometimes

[@WillsGarage91]

I experienced crossfilling plus if it sat for any length of time greater than overnight the first start of that day it would run like shit for 5-10 seconds as the fuel rails were draining back into the tank. The new front tank and pump fixed the crossfilling plus the hard start.

[@Branden_Tarrant]

Will's Garage what brand fuel pump did you go with? I see Spectra makes the cheapest one but have heard mixed reviews on that brand.

[@WillsGarage91]

It is a Spectra Premium. I did the complete assembly.

[@jgodiska]

Behind the rear axle is a fuel control module. They go bad a lot. My son had the problem, and it would die, sometimes going around a curve, or sometimes at a stop sign. Then it would come back. The truck finally quit. We checked youtube, and that is how we found out. He crawled under the truck, and it completley fell apart. no need to remove the tanks.

[@Branden_Tarrant]

John Godiska I believe the fuel delivery module is mounted to the pump inside the tanks on the 1996 F-150. I think they started putting them externally on later models. Unless your son's was a 1996. Everything I've read says these things are tough little boogers to deal with. I still haven't replaced mine, just learned how to manage it. It seems to do better with half a tank or more. I've also noticed the battery gauge dipping when it happens, so I might check my alternator as well.

[@lnfantryFox]

Did you buy the check valve back on the new pump fuel line or did you leave it off.

[@vincentbaca790]

This is what was happening to me...when I bought the truck, used, the gage didn't work on the front tank, so I used only the rear...15 years later , after replacing my fuel pump 4 times, I noticed the front tank was filling up with gas, so much, that the rear fuel gas pump burned out....my mechanic, after calling him, said that it was the rear.fyel pump,bit that I should initially be using the front gas tank...I explained that it was filling with gas, and that it was leaking...so what he suggested was to replace the front gas tank, put a new fuel pump in the front gas tank, put a new fuel pump in the rear tank, only use the front tank, unless I was going on a long trip, then put gas in both tanks, so now I use the front gas tank as my primary, and still haven-'t filled the rear tank....and it runs perfect..no loss of gas, the gage works, and I've had no problems since...hopefully this continues ..

[@MarcoRodriguez-lr2xt]

93 f350 5.8L. Front tank overflows but fills up fine when pumping gas in. Rear tank trips fuel pump when filling gas up at gas station...hard to fill tank up. Do you think front fuel pump module is bad?

[@daveoien6892]

I have the same issue you did you figure this out?

[@MarcoRodriguez-lr2xt]

@@daveoien6892 no. Still the same. Haven't done anything to it since truck isn't used much.

[@jessemartinez8866]

Do you have the wiring diagram or photo of how the new pump was wired in? I hear the colors dont match up with the new harness

[@dinorodriguez5231]

So what ended up being the problem with the gas overflow? Was it the shutter valve that was the problem???

[@isaiahpartida14]

How much did all of that cost you? I'm having the same problem with my truck.

[@frankgonzalez534]

Hello there I know this is and old thread, but I was wondering if you had the part number I’m having the same problem with my 94. Great video!

[@Dj-ve2hx]

I'm having the same problem with my 1994 f150 , but did this fix the problem ? He never said .

[@Dj-ve2hx]

Did it fix the problem ?

[@Aaronlee83]

My truck had just done this. The back tank is leaking out all over the truck and it dies on me going down the road. Just changed the fuel pump in the front tank. 1996 F-150 4.9 300ci straight six Eddie Bauer

[@Sharkboyhunter]

Beef Tannen I know it’s a long time but how much was this repair

[@ddyeo503]

I'm working on a 86 ford F 250 460 engine dual tanks with a bad fuel selector valve. Ford told me that it would cost $430. Part # E67B-9F271-AA for that valve! INSANE! I think the person or persons who come up with these prices should go to jail. Sure want to go out and buy one of their products. Not me, no more money pits for me. Both Ford and GM are getting crazy with their costs, driving their vehicles. I told the owner, pick one tank and give up on the other one. Might find one in a Pick and Pull,,,,,

[@ethandarnell3805]

dan yeoman I just bought a ford motor-craft OEM selector valve for my truck for 195. Cheapest I could find it for, it came from eBay.

[@kayceejones8963]

Dang I'm 1:40 in and I'm like get to the point

[@TheGreggorySmith]

so since mine is back feeding into the rear tank, all I gotta do is replace rear tank fuel pump assembly?

[@WillsGarage91]

Yup. The tank that overfills has the problem.

[@TheGreggorySmith]

Will's Garage now to decide if I wanna fix it, or just drop the tank

[@kjrwhs2003]

@@WillsGarage91 I have a similar issue on a 1996 f250 460 big block. If i fill both tanks full and run the rear tank only to 1/4 tank and as soon as I switch to front tank and use it to the 1/4 tank mark and if I switch back to the rear it shows 1/2 full, does this mean that both FDM's have failed?

[@tkfcon37]

Hello Will, ...Sounds like I'm having the issue you had....Listen mines been doing this now for about 3 weeks been trying to trouble shoot it, ...were you able to use your front tank at all my truck kills when i switch over?? I been using my rear tank and have to siphon gas from my front tank to my back tank about every 3 to 4 days to stop it from overflowing, will be changing mine out real soon!!

[@WillsGarage91]

I was able to use my front tank. Sounds like the electric pump in the front tank has died along with the check valve failing. I'd recommend replacing the entire assembly

[@davispruisman2516]

Similar problem to mine. My truck started to die when in the front tank about 2 months ago. I started only using the rear tank, but discovered that it overflowed to the from as well. Now the rear tank is starting to sputter and die on me, looks like I'll need to replace both.

[@mattperez3618]

Okay, so from what I’m seeing from this video, the entire unit must be replaced? I’m 99% my fuel pump is failing. I get rough starts, poor throttle control, and no power on the front fuel tank. The rear tank works fine but overflows to the front. So all I have to do is replace the fuel pump unit and it should correct the overflow issue?

[@donaldgoembel7109]

Matt Perez did you ever get a response or find the fix to your fuel tank problem mine is doing the same as yours.

[@adamstruthjourney1226]

I have had 3 of these trucks and currently have one. I replaced my front pump a couple years ago and use it regularly for work and it is now transferring fuel from rear to front even when just sitting in the driveway for a week. I filled both tanks and it sat for a week and i noticed it smelled like gas by it and when i started it up a week later the damn rear was at a quarter tank!! I think i will just fully replace both again for good measure and hopefully it will be done for a couple years. I wish you could convert to just one 35 gallon tank cheaply. Ive had the same problems with all of these dual tank fords...and its a damn shame because they are imho the best trucks ever made other than that one stupid detail...the dual tank fuel gremlins.

[@pepito93636]

@@adamstruthjourney1226 did it worked ?

[@adamstruthjourney1226]

@@pepito93636 well i havent done it yet still. Truck still running great every day towing. I have made habit of only filling both tanks right before 50 mile plus trips and otherwise just filling the rear full and half full in the front if im not expecting a lot of miles.

[@adamstruthjourney1226]

@@pepito93636 but i am confident that if i replace at least the front entire pump assembly my problem will be solved but it has to be Ford OE and they cost about 10-12x more than the aftermarket pump that i put in there so...im weary to put 6 or 700 bucks into the fuel pump of a 1500 dollar truck.

[@dee1380]

I have a 1990 Ford F150 that dumps all of my fuel from my rear tank to my front tank. My rear tank & pump are brand new, front tank & pump are old, & do not work. I've searched hi & lo for a fuel tank selector valve, but I promise, I don't see one anywhere, period. I was told there has to be one somewhere.. But for the life of me, there is not one on my truck. Could it be that I have a faulty fuel tank switch? Would that switch cause my rear tank to dump all of my fuel into the front tank? I've put my old fuel pump check valve on the new pump. If the switch isn't the issue, or there is a fuel tank selector valve hidden in one of those hard to find places, then what could be the issue? Is there a fuel tank switch relay? If so, would you happen to know where these things are located.. I'm really stuck.. I put $50.00 in my rear tank, went 5 miles, came back almost empty. Please help, this is a heavy concern.. Thanks in advance..

[@Jimo225]

Dee. Im having the same problem. did you fix it yet? Im currently working on it.

[@MrArron1357]

Same just started Happening to my 1993 Ford f150

[@thecrittergitter7576]

There's a recall on that issue

[@markmiller489]

My rear tank overflows? It’s so confusing

[@jalianturner7932]

How many miles is your truck at when this happened ?? My mechanic saying I have a hole in my tank ... but I hope I don't have this probablem as well only have 63k on my 1991 Ford F-250 .. did you paint your own undercoating???

[@WillsGarage91]

About 155k. The undercoating on the frame is factory however I did the black rustoleum on the tank myself.

[@chadriddle4357]

Which line goes on what connects on the top of the front tank

[@TheFoxShop]

Nice to have that fixed. I know you have been putting up with it for a while now. Should be good to go for a long time now! Ya doing anything with the little jet boat?

[@WillsGarage91]

Thanks buddy. Haven't messed with the jet boat since december.

[@cdizzy898]

What year is this exactly

[@tomasabelriveraarroyo6030]

I HAVE F250 1989 5.8 AND IS DOING THE SAME THING BUT WER IS THE PART THAS BAD

[@edwinstorz2776]

Nice Truck.....

[@ChangWufei]

I'm having the exact same issue. Where did you find the parts?

[@victorjarillo196]

Hey great video . I am having the same problem I get over flow on my front tank on my 96 f150 v6 4.9 I am told that I need a fuel selector valve .. I have no clue where that is and some people tell me that is cost 700 dollars. When I bought the pick up the front tank wasn't working I was told that that's all I need it a new pump bit now some people say I need more then just the pump . Pls tell me how you were able to fix your problem .. I don't want to cancelled my front tank.

[@WillsGarage91]

the selector valve is only on 87-89 efi models. 1990 and up used 2 in tank high pressure pumps. I'd replace the front fuel delivery assembly and your problem should be fixed.

[@victorjarillo196]

Will's Garage Damm I knew it , people around here were telling me that i need it a selector valve so I cancelled the tank. But I am gonna get the part and put it back up .. you wouldn't happen to have a part number do you ?

[@WillsGarage91]

I'll look it up. So a 96 F150 with the 4.9? What size tank and how many tubes coming off of the top of the tank?

[@victorjarillo196]

Will's Garage look I am not for sure in the size of the tank today I filled the rear with a little over 12 gallons , I am assuming that the front tank might be bigger I think is like 16 or so . And it had 2 hoses on the too with an electrical connector. I would really appreciate it people don't seem to know much on these pick ups. Your awesome dude thanks email me if you like. . [e-mail] info plan to fix it if it don't cost much. People were giving me 1000 dollar quote and a 700 dollar part .. but not all seem to know much about it .

[@WillsGarage91]

What size bed do you have? if its an 8 foot bed like mine, your front tank is 19 gallons. Then the part number would be SP2006H from Spectra. Its about $115 from rockauto.com

[@alextraylor4456]

Did this make your check engine light come on? Having the same issue and my light came on???

[@amyschmidt9161]

I have same problem with my 95 ford f 150

[@jcd780]

This happened to me and I started smelling gas almost passed out

[@mnight207]

This guy talks the works way.

[@carlmuoio216]

Mine is doing same thing

[@friskyfrothy5552]

Same problem buddy

[@bryandouglas739]

My truck did the same thing to my 2 days ago and it was hard to start like it had vapor lock

[@_R_E_D__]

the front tank on my 97 F250 7.3L diesel wont fill at all it fills up the neck but not the tank. plz help

[@pitoloko817]

Did you ever figure this problem out I'm having the same issue

[@mikebouck3678]

Your mouth noises at the end of your sentences drive me insane.

[@seanfagan4996]

What the fuck is this channel your garage it is 2 bolts through the straps why would you bring it to a garage.

[@Lesley959]

Was not a helpful video, kinda lame if you ask me

[@johnwheeler2556]

Walking down the street from where you work is information unneeded you talk a lot about things that's irrelevant to the issue