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BR3W CITY · 08-28-2016, 09:42 PM

55-60psi is normal operating range, so you want to have that range at all times. Unless its a Flex Fuel truck, it shouldn't be seeing less than 50psi, or much more than 60-65 on the high end.

A pump will usually bleed down pressure after the vehicle shuts off, at least to a certain extent. That isn't something that would cause the symptoms you describe.

When the truck is running, does the fuel pressure keep going lower and lower?

08-28-2016, 09:42 PM	#4
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: Fuel pump louder when running 55-60psi is normal operating range, so you want to have that range at all times. Unless its a Flex Fuel truck, it shouldn't be seeing less than 50psi, or much more than 60-65 on the high end. A pump will usually bleed down pressure after the vehicle shuts off, at least to a certain extent. That isn't something that would cause the symptoms you describe. When the truck is running, does the fuel pressure keep going lower and lower? __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD