INFO: Stock fuel Pressure!!
08-21-2003, 01:33 PM
#1
3.0 BAR
Thread Starter
Join Date: Feb 2003
Posts: 9,089
INFO: Stock fuel Pressure!!
I've read a few times on here with people having problems w/ idle and 450cc. For those of you who have an adjustable FPR and have adjust for 38-40psi might be interested in something that i read yesterday!
I read that the fuel press should be 38-40 psi when the vac line is DISCONNECTED from the regulator. and should read 28psi when CONNECTED.
This would make sence since when idling (VAC) you want a lower pressure and while steppig on the gas you want a higher press (no vac, hence disconnected vac line).
any thoughts!?
UPDATE: I just read the fuel press testing in my service manual and it has been confirmed that the info is accurate!!
I read that the fuel press should be 38-40 psi when the vac line is DISCONNECTED from the regulator. and should read 28psi when CONNECTED.
This would make sence since when idling (VAC) you want a lower pressure and while steppig on the gas you want a higher press (no vac, hence disconnected vac line).
any thoughts!?
UPDATE: I just read the fuel press testing in my service manual and it has been confirmed that the info is accurate!!
08-21-2003, 08:11 PM
#2
3.0 BAR
Join Date: Mar 2003
Posts: 21,479
Re:INFO: Stock fuel Pressure!!
Mine won't go that low. 
__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
08-22-2003, 07:30 PM
#5
0.0 BAR
Join Date: Jun 2003
Posts: 38
Re:INFO: Stock fuel Pressure!!
heh...set the pressure with the vac line off. BINGO! Should work like a charm ...stock is 38-42 at WOT which means if you disconect the vac line you'll be sorta simulating wot....so yeah...set your fuel pressure with the vac line off.
08-22-2003, 08:56 PM
#6
3.0 BAR
Join Date: Mar 2003
Posts: 21,479
Re:INFO: Stock fuel Pressure!!
Originally Posted by crx88Si
With the vac line connected it wont go down to 28psi? do u have a pump and/or aftermarket FPR?
__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
08-23-2003, 11:40 AM
#8
1.5 BAR
Join Date: Feb 2003
Posts: 828
Re:INFO: Stock fuel Pressure!!
Originally Posted by Dr.Boost
Originally Posted by crx88Si
With the vac line connected it wont go down to 28psi? do u have a pump and/or aftermarket FPR?
08-23-2003, 11:57 AM
#9
3.0 BAR
Join Date: Mar 2003
Posts: 21,479
Re:INFO: Stock fuel Pressure!!
Originally Posted by 98SilverCivic
Damn...and your running n/a with stock compression? You gotta be running majorly rich if you are....
I think it's just the FPR. I always thought stock fuel pressure was about 38psi. My vac has always been good. I lost a bit when I installed my cam though. It went from about 22in. to about 20 at idle, but the idle is a bit rough.
__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
