1992 F-150 Rear fuel pump
#1
03-12-2001, 08:23 PM
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1992 F-150 Rear fuel pump
When I switch from the front tank to the rear tank, I get a hesitation (about 2 seconds) and when the truck is parked overnight with the rear tank selected, it cranks for about 3 or 4 seconds before it starts. Seems to run ok on rear tank all other times. Question: Is there a check valve in the pump that to keep fuel pressure up when the pump is not being used?
#2
03-12-2001, 09:42 PM
1992 F-150 Rear fuel pump
Hi, welcome to the boards, there is a check valve I just don't know where it is located some of the fueltank experts will jump in here and tell you where to look. Or if you look in the archives, past posts just keep scrolling down to the bottom there are a lot of fuel tank questions and I'm sure it was in there John
#3
03-17-2001, 07:22 PM
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1992 F-150 Rear fuel pump
In studying the "Haynes" manual, specifically the section concerning the Fuel Delivery Module (FDM) system on trucks with dual tanks, such as my '92, there is a check-valve in the pump in each tank. I priced the replacement at one of the NAPA stores, and they want $208 for a new pump. Based on that price, I can live with a hesitation when I change tanks----and if necessary, I'll start on the front tank----$208 --- wow!
#4
03-25-2001, 05:26 PM
1992 F-150 Rear fuel pump
Well, I've changed mine already so here is some things to think about.
The truck is starting to tell you that the rear pump is old. It may hold up for years, it may die on you tommorow. Thats OK having two tanks.
If your like me, then you have about the same useage on the front tank, so its a bit old too. i wouldn't change it until you get problems with it tho.
Always always always swap tanks befor the tank is empty. The few seconds the pump runs without fuel shortens its life.
If and when it comes time to change a pump, running gas with high levels of cleaners in it (to keep the injectors clean) are corrosive on the sending unit. You might as well put a new one in it while you have the pump out (about 30 dollars) I don't mind the sending unit getting ate up early, its a lot cheaper than havoing injector work done.
IF you decide to change both pumps at once (rare, but could happen) think about lifting the bed up rather than the tanks down. it may be easier.
Stephen W. Hansen
92 F-250 XLT (125,000 and going strong)
http://members.tripod.com/sacketttt/my_1992_f-250.htm
50 F-1 (some assembly required)http://members.tripod.com/sacketttt/1950_F-1.htm
shansen@ndak.net
The truck is starting to tell you that the rear pump is old. It may hold up for years, it may die on you tommorow. Thats OK having two tanks.
If your like me, then you have about the same useage on the front tank, so its a bit old too. i wouldn't change it until you get problems with it tho.
Always always always swap tanks befor the tank is empty. The few seconds the pump runs without fuel shortens its life.
If and when it comes time to change a pump, running gas with high levels of cleaners in it (to keep the injectors clean) are corrosive on the sending unit. You might as well put a new one in it while you have the pump out (about 30 dollars) I don't mind the sending unit getting ate up early, its a lot cheaper than havoing injector work done.
IF you decide to change both pumps at once (rare, but could happen) think about lifting the bed up rather than the tanks down. it may be easier.
Stephen W. Hansen
92 F-250 XLT (125,000 and going strong)
http://members.tripod.com/sacketttt/my_1992_f-250.htm
50 F-1 (some assembly required)http://members.tripod.com/sacketttt/1950_F-1.htm
shansen@ndak.net
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