#20863, "attn dino or others with electronic fp guage"
my fp guage is now mounted to the test port in the fuel rail and it is stuck at idle fp (either 45 or 50 i'm spacing it right now)until i go under boost then it goes up. so i'm wondering if yours does the same thing. i don't really know how it should work but it seems to me that if i put my foot to the gas the pressure should start rising right? even when i'm laying into the throttle it doesnt move until i'm in boost. does this sound correct
I edited to the wiki!
Originally posted by DR1665 NOTE TO SELF: Go commando to wedding. Scar the Irishman for life.
#20864, "RE: attn dino or others with electronic fp guage" In response to Reply # 0
Yeap.
Mine moves about 5psi under partial throttle because my stock regulator is still in place and fully functional. If you're using an SFMU with the stock regulator disabled, it won't move until you hit boost.
Either way, it's not something to worry about. You can't read 5psi on that damn gauge anyway
______________________________ If a sentence found online has 35% misspellings or greater and includes at least two racially charged expletives, chances are it is a YouTube comment.
'95 Eclipse TurboGS (garage deco) '95 TSi AWD (restoring a survivor) '97 Talon ESi-T (poor impulse control) '99 Eclipse RS-T (daily beater) '13 Evo X (mostly stock) '17 Sienna (Middle Aged Dad Mobile)
#20866, "RE: attn dino or others with electronic fp guage" In response to Reply # 2
it's the pressure in the rail that matters anyway.
______________________________ If a sentence found online has 35% misspellings or greater and includes at least two racially charged expletives, chances are it is a YouTube comment.
'95 Eclipse TurboGS (garage deco) '95 TSi AWD (restoring a survivor) '97 Talon ESi-T (poor impulse control) '99 Eclipse RS-T (daily beater) '13 Evo X (mostly stock) '17 Sienna (Middle Aged Dad Mobile)
#20867, "RE: attn dino or others with electronic fp guage" In response to Reply # 3
ok, i know this, but is the pressure of the line right before the rail the same as the pressure @ the test port?
i have my fp guages T-d off the line that feeds the rail, much like the way hahn does there fp gauge... is this just as accurate as have the sender hooked to the test port?
#20868, "RE: attn dino or others with electronic fp guage" In response to Reply # 1
So what about when you go from idle vacuum to 0 boost? If the idle fuel pressure is around 44 psi, shouldn't the fuel pressure rise a little at 0 boost 0 vacuum and then rise according to boost? This all assuming the stock regulator is disabled and a vortech SFMU is being used.
-Jared 96 GS Melbourne, FL
Iceman CAI | RS*R Cat-Back | AFX Pully | Milled Head 10:1 CR | MP 60mm TB
#20869, "RE: attn dino or others with electronic fp guage" In response to Reply # 5
He's using a stock FPR on rail (unhooked vac line) and regular FMU. Because it is set up like this, you should see one number (50 psi?) from full vacuum to 0 boost. From 0 boost to 8 boost, expect the pressure to rise linearly.
Corbin
'95 ESI-T HRC+FMIC+ETC...
Gimme fuel...Gimme fire...Gimme that which I desire
#20870, "RE: attn dino or others with electronic fp guage" In response to Reply # 6
still wondering if it matters where you put the fp guage at... is it ok to have it in the line that feeds the rail, or is the pressure there going to be different than the pressure at the test port on the rail?
#20871, "RE: attn dino or others with electronic fp guage" In response to Reply # 7
The pressure should be very close. Each bend or disruption in flow will cause a pressure loss, but the difference between in the rail and the rail input should be small. You may not even be able to see it on a standard gauge.
Corbin
'95 ESI-T HRC+FMIC+ETC...
Gimme fuel...Gimme fire...Gimme that which I desire
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