Fuel Pressure

[pumm3l]

I recently installed an electric fuel pressure gauge. At idle I'm about 29-30psi and at WOT it's about 40-42psi. I noticed though when I drive for longer then normal periods of time (an hour or more) at idle the pressure will sometimes increase to 35-40 psi but it will still stay under 42 psi at WOT, I was just curious if this was normal or not.

 

[Mike97gt]

I recently installed an electric fuel pressure gauge. At idle I'm about 29-30psi and at WOT it's about 40-42psi. I noticed though when I drive for longer then normal periods of time (an hour or more) at idle the pressure will sometimes increase to 35-40 psi but it will still stay under 42 psi at WOT, I was just curious if this was normal or not.

normal

 

[jstreet0204]

Normal. The EEC will up the fuel pressure under certain circumstances, like a hotter engine.

 

[pumm3l]

Thanks guys I apprecaite it.

 

[Dan_Soprano]

I recently installed an electric fuel pressure gauge. At idle I'm about 29-30psi and at WOT it's about 40-42psi. I noticed though when I drive for longer then normal periods of time (an hour or more) at idle the pressure will sometimes increase to 35-40 psi but it will still stay under 42 psi at WOT, I was just curious if this was normal or not.

the EEC increases fuel presure at higher engine temps to keep the fuel from boiling in the fuel rails. Normal.

 

[Roxstang]

the EEC increases fuel presure at higher engine temps to keep the fuel from boiling in the fuel rails. Normal.

I notice the same thing, I asked the same question and got the same answer. You ought to see the pressure when I hit the nitrous with a 255lph walbro in the tank....Woooooo It's all over the place, anywhere from 70psi WOT to 35 between shifts.