In Tank Fuel Pumps

[Lariat150]

Hi All:

Question:

Are the in tank fuel pumps in a 1987 F250 7.5 L with a 4Bl Carburetor, the same pumps used in a 1988 F150 5.0L EFI. Do the 1987 pumps have the same volume and pressure output as the 1988 in tank pumps.

Thanks

Lariat150

 

[HazzardMadWolf]

I would say no. But I'm not 100 percent on that. With the carb you only need 7 psi. For a EFI they run quite a bit higher. Some of the other guys will know better though. I have an 85 f350 with the 7.5L just replaced both pumps recently, cost wasn't to bad IMO.

 

[Fellro]

I'd have to look them up, but it is possible as the 88 uses a low pressure transfer pump and a secondary high pressure pump.

 

[conanski]

A fuel pessure regulator is still needed when doing a carb conversion on an '88 or '89 truck using the in-tank pump only so I'm going to say no it isn't quite the same as the earlier carbed pump.. about the same pressure but more volume.

 

[rickpilgrim]

Our 87 F-250 Ex Cab with 460 4bbl c-6 4x4 has an in tank low pressure in both tanks and a frame mounted booster pump but the "boost" is only 8.5 psi at the carb. I would use the pump that goes with the engine, as when I got new tank pumps the parts guy said there were "at least 5" different pumps for that yr.