Chevy S-10 fuel pump installation?!?! What does the R and F stand for?

Question

There is 3 stems that are on the top of the fuel pump, where the hoses connect. One has a R and one has a F. The stem in the middle is the vent. What does the R and the F stand for?!?!? Rear and Front? Resivoir and Fuel? Help

Answer 1

Okay, the R stand for Return Line which should be the smaller of the two, but larger than the vent, then the F is not an F but a P which means Pressure, that is the outgoing. That would be larger like a 3/8 size. The return will be 5/16th and the vent it self is quarter inch. Also pay close attention to connector pins of electrical at pump for loose or slightly melted plastic around pins. Don't take any shorts, get an AC Delco pump or go straight to the dealer, please if anything take my advice on this, don't go to Auto zone, or some aftermarket for a fuel pump, you will pay the price about 6 months down the road, also for future advice, don't let your gas gage get below a quarter of a tank, if you do you will start sucking in all the trash and you will burn up your pump faster and clogged your filter also. Also change your fuel filter about every 20,000 miles and that will make your pump last alot longer. Good luck. Anthony ASE Certified Master Mechanic.

Answer 2

Electric fuel pumps that live in the gas tank are like a never ending recirculating devices. Some old mechanical pumps are similar. There is a return line that lets gasoline run back into the tank when it is not needed while you are driving at speeds under 120 MPH or full throttle.

That being said, the R most likely stands for Return and the F stands for Fuel Pump or Fuel Rail or Front to the Fuel rail and injectors or something else related to Forward to the Freaking engine. Hahahaha!

It could also mean "Fart" if this car has a Fart recirculation hose to boost your miles per gallon. Have Fun with it.

Hope this helps.

Good Luck!

Answer 3

Right Front

Answer 4

Return and feed