Acura 1994 Integra Service Manual page 297

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Eecause of its compact impeller design, the fuel pump is installed inside the fueltank, thereby saving space

ng the fuel line system.

FUEL PUMP BRACKET

FUEL PUMP CROSS SECTION lsido vi6rvl

The fuel oumo consists of a DC motor, a circumference flow pump, a relief valve for ptotecting the fuel lir

a check valve for retaining residual pressure, an inlet port, and a discharge port. The fuel pump assembly

the impellers (driven by the motor), the fuel pump casing {which forms the pumping chsmber), and the fuel p

(1 ) When the engine is started. the PGi/t-Fl main relay actuates the fuel pump, and the motor turns togeth

Differential pressure is generated by the numerous grooves around the impellers.

(2) Fuel entering the inlet porr flows inside the motor from the pumping chambe. and is forced through th

port via the check valve.

lf tuel flow is obstructed at the discharge side of the tuel line, the relief valve will open to bypass the

inlet port and prevent excessive fuel pressure.

(3) When the engine stops, the tuel pump stops automatically. However, a check valve closes by gravity t

residual pressure in the line, helping the engine to aestan more easily.

and simplify-

N lTop vi6w)

fuel line systems,

embly consists of

fuel pump cover.

together with the

rgh the discha.ge

ss the fuel to the

avitv to retain the

FUEL PUMP ASSEMBLY CROSS SECTION

D|SCHARGE FORT ^

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Integra 1994