I bought this truck a couple months back and it had been sitting basically for a year. 100k good looking truck. Discovered a hole in the rear gas tank so, I swapped it out with a new tank and new fuel pump. After I was done I also did the fuel filter. After a while I started to smell gas. When I killed it and got out of the truck and occasionally will smell it in the cab. I have checked the canister purge solenoid and been all over under the truck looking for leaking fuel and found none. I am planning on going on a big trip tomorrow so I filled both tanks up today and drove to work. When I got home I was still hunting for the smell and took the back gas cap off and gas came pouring out. Where do I go from here?

 

which tank and pump did you replace?

 

rear tank and pump

 

is both your tanks working properly it might be the transfer pump on the frame backing up (if it has one) im not to sure if it does, or it could be a pinched line and its cycling back cause of pressure

 

it should have just 2 pumps both intank. it sounds like the issue im having its cross filling its just wierd its sending it to the new pump. where did the pump come from?

or the front return is stuck shut?

 

idk bout a f250 but i do know on a 1991 5.0 dual tank with in tanke fp that if one fp isnt the right one or if it aint working right itll flood the other tank, flood the line so it wont start or suck air into the tanks and or lines trust me i know lol

 

Were you running off the front tank when this happened? If you were, it's probably a bad check valve in the front fuel delivery module. I've read posts about this quite a few times on here. I don't know if Ford recalled this or not but you could call your local dealership about this and they will probably know exactly what's happening.

 

I was running on the front tank and it filled the back tank. I recently replaced the FDM in the back tank. I am wondering if I got a faulty FDM?

 

Recall data for: 1993 FORD F150
NHTSA Campaign Number: 01I008000
Manufacturer Campaign Number:
Make: FORD
Model: F150
Year: 1993
Component:
FUEL SYSTEM, GASOLINE
Manufacturers Involved: FORD MOTOR COMPANY
Begin Date Of Manufacturing: 19890722
End Date Of Manufacturing: 19930824
Recall Type: I
Potential Number Of Units Affected: 1556221
Date Owner Notified By Manufacturer: 20010709
Recall Initiator: ODI
Manufacturer Responsible For Recall: FORD MOTOR COMPANY
Date Report Received By ODI: 20010719
Date Added To File: 20010719
Regulation Part Number:
Federal Motor Vehicle Safety Standard Number:
Defect Summary:
THIS IS NOT A SAFETY RECALL IN ACCORDANCE WITH THE SAFETY ACT. HOWEVER, IT IS DEEMED A SAFETY IMPROVEMENT CAMPAIGN BY THE AGENCY. VEHICLE DESCRIPTION: 1990-1993 FORD F-SERIES VEHICLES EQUIPPED WITH DUAL FUEL TANKS AND 4.9, 5.0,5.8, OR 7.5 LITER GASOLINE FUELED ENGINES. SOME VEHICLES CAN EXPERIENCE A CROSS TANK FUEL FLOW CONDITION DUE TO A DAMAGED CHECK VALVE IN THE FUEL PUMP/SENDER ASSEMBLY. FUEL MAY BE SUPPLIED FROM ONE TANK AND SOME OR ALL OF THE UNUSED FUEL MAY BE RETURNED TO THE OTHER TANK.
Consequence Summary:
SHOULD THIS OCCUR, THE CAPACITY OF THE RECEIVING TANK MAY BE EXCEEDED AND FUEL MAY OVERFLOW FROM THE FILLER CAP.
Corrective Action:
FORD IS EXTENDING THE WARRANTY FOR POTENTIAL FUEL CROSS-FLOW TO 12 YEARS OF SERVICE OR 150,000 MILES FROM THE VEHICLE'S WARRANTY START DATE, WHICHEVER OCCURS FIRST. THIS COVER WILL AUTOMATICALLY TRANSFER TO SUBSEQUENT OWNERS AT NO CHARGE. IF A VEHICLE ALREADY HAS MORE THAN 150,000 MILES, THIS OVERAGE WILL LAST UNTIL DECEMBER 31, 2001. IF THE VEHICLE IS EXPERIENCING A FUEL CROSS-FLOW CONDITION, DEALERS WILL REPAIR THE CONDITION FREE OF CHARGE.

 

I FOUND YOUR PROBLEM

 

Well I dropped the rear tank again and checked everything (by myself, which was not on my bucket list). Replaced the gasket on the fuel pump. If that don't change anything I will change the front pump. Then I will start to change evaporative system parts. On a side note if you look for parts for a 97 F250HD on rock auto I am finding that I have to look at 96 because they say the parts don't fit a 97 (I even called). I guess no one told them they built my truck.

 

The problem is in Rock Auto's Database. For made an F250 (light duty (7700 GVWR) in 1997 with the 10th generation body and that's where the confusion is. I don't think there are any part differences from 95-97 (9th gen) F250.