I have a 93 mustang gt hatchback 5.0 of course. well my fuel pump is humming pretty loud and sometimes my car just shuts down on me when i stop accelerating. could this be the fuel pump or fuel relay problems? and if the fuel pump, and need a new one, can my car handle a larger lph than stock. its got headders, flowmaster exhaust, new msd distributor, eliminator pullys, cold air intake with mass flow air sensor, king cobra clutch, cobra intake and a few more. and where is the fuel pump relay located, i cannot find it. so please help if you could. thank you

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Fox bodies have it under driver's seat.
less than $10 at NAPA.
A good first choice.

You can use larger flow, excess will be dumped
back to tank.