2003 Chevrolet Silverado Fuel pump

Tiny
SIKNTWISTD
  • MEMBER
  • 2003 CHEVROLET SILVERADO
  • 5.4L
  • V8
  • RWD
  • AUTOMATIC
  • 100,000 MILES
I mounted an external pump but then ended up putting an internal pump my question is will the gas flow through the external pump without the pump hooked up or do I have to disconnect it completely
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Friday, May 8th, 2015 AT 5:33 PM

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Tiny
CARADIODOC
  • EXPERT
Depends on the type of aftermarket pump. Most high pressure pumps use a pair of toothed gears and are pretty restrictive when forcing fuel through them when they aren't running. With a fuel return system with the pressure regulator on the fuel rail on the engine, that will cause stalling due to low fuel pressure when the highest volume is being pumped, which is during coasting.
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Friday, May 8th, 2015 AT 8:04 PM

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