Replacement of Gas Tank?

Tiny
LOVIE66
  • MEMBER
  • 1994 FORD F-150
Engine Performance problem
1994 Ford F150 6 cyl Two Wheel Drive Manual

REPLACED FUEL PUMP IN REAR TANK AN NOW WHEN I TURN IT ON IT PUMP FURL FROM FRONT TANK TO REAR TANK AN ENGINE BOGS ON FULL ACCELRATION AN ROUGH IDLE?
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Tuesday, July 7th, 2020 AT 3:03 PM (Merged)
Tiny
LOGGER9409
  • MEMBER
I own a 1993 ford f150 with dual tanks
on the rear tank there is a small in line check valve that is designed to keep fuel from flowing back into the tank when not in use. I had one fail on me and through many tries and lots of new parts I found the problem take it off. The only difference I saw was a 4-5 sec. Delay when I had not used the tank for a few months. TAKE IT OFF wont cost you a thing. It caused my fuel pressure to drop and rough idle and when it finally plugged, truck had no power and would hardly run.
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Tuesday, July 7th, 2020 AT 3:03 PM (Merged)
Tiny
KB57
  • MEMBER
  • 1992 FORD F-150
Engine Mechanical problem
1992 Ford F150 V8 Four Wheel Drive 100000 miles

Starts up, runs good, but when turned off it won't start back up for 3 to 4 hrs. Later. I have put a new gas filter on and, drained all old gas and replaced with new. Put in fuel injection cleaner. Gas filter builds up alot of pressure. Vaccum hose is dry. Has dual gas tanks. No matter which tank is used it will do the same.
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Tuesday, July 7th, 2020 AT 3:06 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
WHen you shut it off, is the engine getting spark and can you hear the fuel pump engage for a second or two when you first turn the key on?
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Tuesday, July 7th, 2020 AT 3:06 PM (Merged)
Tiny
KB57
  • MEMBER
Yes engine is getting spark, and yes you can hear fuel pump engage
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Tuesday, July 7th, 2020 AT 3:06 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
If you are getting both, then either there is a timing issue, compression issue. I want you to try something for me. See if the engine starts for a few seconds with starting fluid.

Joe
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Tuesday, July 7th, 2020 AT 3:06 PM (Merged)
Tiny
KB57
  • MEMBER
I will try that tomorrow. I need some starting fluid. I will get back with you then. Thank-You.
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Tuesday, July 7th, 2020 AT 3:06 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
Let me know because if it starts with starting fluid, then we have a fuel related issue. If it doesn't, then it's ignition related.

Joe
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Tuesday, July 7th, 2020 AT 3:06 PM (Merged)
Tiny
BUTCHER BOB
  • MEMBER
  • 1992 FORD F-150
  • 4.9L
  • 6 CYL
  • 2WD
  • MANUAL
  • 154,478 MILES
My truck has two tanks and when I run the front tank or the rear tank, the fuel is pumped back and forth, from one tank to the other. On the rear tank, the truck runs fine, beside pumping from one tank to other tank. But when I use the front tank, it pumps to the rear tank for a short while then after about 5-10 minutes, the truck starts too buck, chock, fart, until I switch the tanks, if I'm driving the check engine light on the dash comes on, once I switch the tank to the rear one after about 2-3 minutes the light will go out. The light only comes on when I use the front tank and it only bucks up when I use the front tank.I have changed the fuel sensor check valve and the fuel line gas filter, now it runs for a while normally then starts to buck, on the rear tank, no problem other then the pumping of fuel to the front tank. This was a recall problem for Ford in 1992, but they will not honour the recall because of the age, and the cross over fuel switch which is on the frame rail, is no longer available from ford, could that be my problem and is their a after market part I can get from somewhere. Thanks Robert
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Tuesday, July 7th, 2020 AT 3:06 PM (Merged)
Tiny
KB57
  • MEMBER
It would not start. Any suggestions for my next step? Thank-you.
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Tuesday, July 7th, 2020 AT 3:06 PM (Merged)
Tiny
OBXAUTOMEDIC
  • EXPERT
Hello,

Yes, the switch is not closing off properly so it will cause your problem. Have you checked with your local Auto Parts Store to see if they have a universal aftermarket one or try ebay or amazone.
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+3
Tuesday, July 7th, 2020 AT 3:06 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
If it isn't at least backfiring with starting fluid, I need you to recheck the spark. Is it a hot blue snapping spark? If it is, then we have to check compression. Check the spark and here are the directions for checking compression.

https://www.2carpros.com/dia/how_to_check_compression.htm

If you have good spark, fuel pressure, and compression, it has to run unless the timing is bad.

Let me know what you find.
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Tuesday, July 7th, 2020 AT 3:06 PM (Merged)
Tiny
KSTAACK
  • MEMBER
  • 1991 FORD F-150
  • 5.0L
  • V8
  • 4WD
  • MANUAL
  • 126,000 MILES
The fuel line on the rear tank keeps blowing apart I replaced the fuel filter could the fdm or fuel pump cause this problem it only blows the line closest to the tank
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Tuesday, July 7th, 2020 AT 3:15 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
Is this a rubber hose? Are you replacing it with hose that is made for fuel and pressure?
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Tuesday, July 7th, 2020 AT 3:15 PM (Merged)
Tiny
KSTAACK
  • MEMBER
It's the nylon plastic line
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Tuesday, July 7th, 2020 AT 3:15 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
Can you describe where it is located. I have to be honest, I have never seen plastic fuel line. Rubber fuel line is common and steel is always used, but I never saw plastic.
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Tuesday, July 7th, 2020 AT 3:15 PM (Merged)
Tiny
KSTAACK
  • MEMBER
It comes off the fuel pump on the rear tank the nylon plastic is aftermarket crap I tried the dealer and can get it from them I honestly never seen this before
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Tuesday, July 7th, 2020 AT 3:15 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
Can you upload a picture for me to see what you are dealing with? I feel that should be regular rubber fuel line and not plastic. The plastic won't withhold the pressure.
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Tuesday, July 7th, 2020 AT 3:15 PM (Merged)
Tiny
RYAN_DYL
  • MEMBER
  • 1991 FORD F-150
  • 170,000 MILES
I have dual tanks in my truck. The rear tank runs fine but sends fuel to the front tank when running. The front tank has worked after impact (was going to remove tank with air powered ratchet but started working for a couple weeks after that). The front tank doesn't work anymore and gets overful spilling fuel out the top. Please help as soon as possible.
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Tuesday, July 7th, 2020 AT 3:15 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
I don't recall exactly, but there was either a technical service bulletin (TSB) or a recall on the unit that switches from front to rear. Have you contacted a dealer?
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-1
Tuesday, July 7th, 2020 AT 3:15 PM (Merged)

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