Two views of a black plastic dual-function fuel reservoir automo…
'84-89 Fuel ReservoirsView all 37
Dual-Function Reservoir F1UZ-9B263-B
If available, priced from $90-300 plus sh Ford F1UZ-9B263-B, Dorman 911000, or any knock-off copy like this one or this other or this third...
Used on '84-89 F-series/E-series/Rangers/others with dual tank dual-pump EFI. NOT used on Broncos.
If the engine only runs on one tank, but dies after a minute running on the other, AND both tank fuel pumps are known to be good, the reservoir's switching valve mechanism is probably stuck. Remove its 2 mounting bolts & clean it thoroughly BEFORE disconnecting any lines. Replace the reservoir on the frame & loosen (but do not remove) the reservoir cup BEFORE removing the reservoir assembly from the vehicle. See the NEXT several pics & captions...
To semi-permanently eliminate the reservoir and use only 1 tank, use these Dorman fuel tubes.
A reservoir marked "DO NOT REMOVE CUP" does not contain a filter. For a replacement O-ring for the cup, buy a NAPA 3268, Fram CG3862DP, or equivalent filter.
See this caption:
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