My check engine light came on, so I went to autozone and it was code 171 - too lean. I went home and checked my fuel pressure and it's at about 35 PSI with full vacuum and about 50 PSI without at idle. Isn't this where it's suppose to be? Could something else be causing the code?

BTW I'm running a HRC Stage II with a Vortech SFMU, everything else is stock.


http://www.geocities.com/turbo99gs

If i''m not mistaken, idle fuel pressure with vacum, should be around 50-55 psi up to 0 Hg's...35 psi at idle is too low..i'm surprised the car even ran good at idle with that pressure...try and adjust the idle pressure with the vac line connected, and get it to about 50 psi. I'm not really sure why vortech says to adjust idle pressure with no vac..i guess maybe to get the pressure close until you start the car for the first time after installing it...my guess anyway..i'm sure others can give you more info..

13.5 @108 MPH-2.2 60ft(stupid FWD!)
S16G @ 18 PSI/FMIC/Running on MegaSquirt II (Now with sequential
fuel injection)
My webpage: http://eclipsed4evr.home.comcast.net
-1998 Mitsubishi Eclipse RS-T- "Toy"
-1992 Plymouth Laser Turbo AWD(SOLD)
-2000 Honda CR-V(daily)

Alright bro, I up'd the pressue to about 55 PSI with the vac. line connected. Will the light go off by itself, or will I need to get it reset?

You know what sucks, I've been driving around for about 3 weeks with my fuel pressure like that. I've had some exhaust leaks so I really haven't been boosting, thank goodness.


http://www.geocities.com/turbo99gs

Reset the ECU by disconnecting the negative battery cable for like 10 seconds, then reconnect it. This erases all codes in the computer. Your light shouldn't come back on. If it does, and your fuel pressures are ok, then something else is wrong. When i was re-installing my Cartech FPR, after i took it apart, the fuel pressure was like at 30 psi at start up..Barely even wanted to run..With the probs i have been haveing, adjusting the idle pressure to anything under 40 psi, the car would not run very good at all..haha, i'm surprised you didn't notice any idle problems with it at 35 psi My car seems to run the smoothest at idle with the pressure around 50 psi at around 16 Hg's of vacum.

13.5 @108 MPH-2.2 60ft(stupid FWD!)
S16G @ 18 PSI/FMIC/Running on MegaSquirt II (Now with sequential
fuel injection)
My webpage: http://eclipsed4evr.home.comcast.net
-1998 Mitsubishi Eclipse RS-T- "Toy"
-1992 Plymouth Laser Turbo AWD(SOLD)
-2000 Honda CR-V(daily)

Ehh, why worry about resetting the ECU. My check engine light comes on half the time, goes off half the time. When i've been messing with the fuel pressure settings, i'll find my car struggle to live around 25psi at idle, but have a few times came home to a 38psi idle pressure. Stupid FPR.




Jon

1997 Eclipse RS

MODS: 8.8:1 JE Pistons / Eagle rods / Stage 1 Hahn turbocharger / Melling Oil Pump / Autometer 5" tach / 2 JL 12" W0 subwoofers / JL Audio 500/1 amp / Clarion 230w amp / short shifter mod / GReddy EVO exhaust / custom 2 1/2" downpipe / no cat con / CM Stage 1

Jon

1997 Eclipse RS | 2001 Lexus IS300
12.671 @ 111.660 1.586 60' 5/28/04

www.haiokuracing.com