Fuel pressure test - is there a test connection point?
- Thread starter eddyvr4
- Start date
naughtika
OzVR4 Stalker
no it doesn't, I don't think I've ever seen it on a regular road car as well..
I'd like to see one though
you'll have to purchase one of this from 3sx
http://www.3sx.com/store/comersus_viewItemBundle.asp?idProduct=24512
I'd like to see one though
you'll have to purchase one of this from 3sx
http://www.3sx.com/store/comersus_viewItemBundle.asp?idProduct=24512
eddyvr4
Leaving Skid Marks
- Thread starter
- #4
I borrowed a fuel pressure guage, and I did have to cut into the rubber fuel hose leading to the fuel rail and fit a T piece in to measure the fuel pressure.
for the record, the fuel pressure is about 43 psi or so at idle and under full throttle (15 or 16 psi of boost) would rise to about 60psi which i understood is about right (although someone jump in if not).
connecting the fuel pressure guage to the outlet side of the fuel regulator (the return to the tank) was pretty inconclusive, it seemed to read a few psi at idle and nothing under load.
one other thing i learnt during this process is the fuel pump only gets about 7.5 volts at idle and coasting, then comes up to 12V only once you get onto the throttle. (by design) i verified that with the multimeter. just keep that in mind if trying to check your fuel pump flow, or pump voltage etc when at idle.. 7.5 volts does NOT indicate somethings broken..
for the record, the fuel pressure is about 43 psi or so at idle and under full throttle (15 or 16 psi of boost) would rise to about 60psi which i understood is about right (although someone jump in if not).
connecting the fuel pressure guage to the outlet side of the fuel regulator (the return to the tank) was pretty inconclusive, it seemed to read a few psi at idle and nothing under load.
one other thing i learnt during this process is the fuel pump only gets about 7.5 volts at idle and coasting, then comes up to 12V only once you get onto the throttle. (by design) i verified that with the multimeter. just keep that in mind if trying to check your fuel pump flow, or pump voltage etc when at idle.. 7.5 volts does NOT indicate somethings broken..
naughtika
OzVR4 Stalker
that is through directly..
we could've added this in the FL group buy if you had mentioned it
we could've added this in the FL group buy if you had mentioned it
Kaldek
2 AYC Bars
- Location
- Melbourne
- First Name
- Ed
- Drive
- 2000 Legnum VR4 Manual, Ford Territory family runabout, BMW K1300R.
Ordered directly from 3SX. I contacted them directly and they offered me USPS shipping for less than a quarter of the cost.
I like diagnostics. Being able to see fuel pressure will stop me from barking up the wrong tree if I ever feel the need to check it and can't. Plus I can remove the gauge if I need to and fit a digital pressure sensor.
Mind you I didn't check if there's any space to fit the adapter yet.
I like diagnostics. Being able to see fuel pressure will stop me from barking up the wrong tree if I ever feel the need to check it and can't. Plus I can remove the gauge if I need to and fit a digital pressure sensor.
Mind you I didn't check if there's any space to fit the adapter yet.
Not sure where the 43 psi comes from, my service manual states 38.5 at idle, vacuum hose connected, 48.5 disconnected.
I don't they'll care, it's like 6 years old...
Jamezyp1
Idling at the Lights
Ahaaa..but he did atleast help me, cuz im tryna figure out what my stock fuel pressure is supposed to be rn. Having an issue with the car during accel where its breaking up, sputtering and holding back..only on hard pulls tho, and im realising my fuel pressure is way off. 28 or so on idle..and well just below 40 with vacuum line off.
