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Why am I hitting fuel cut at 11 PSI?
Posted: Thu Sep 21, 2006 9:36 pm
by IronMonkeyL255
Or really, it seems like 10.5 PSI.
I have a WRX intercooler and a MBC, and I just recently started hitting fuel cut if pressure stays at about 10 or 11 PSI for too long.
Any ideas? I may just build Vikash's FCD and be done with it, but I'm just trying to figure out why it's cutting fuel at ~2 PSI lower than it should.........
Posted: Thu Sep 21, 2006 9:49 pm
by BSOD2600
Maybe your elevation of ~1000ft is lowering the cutoff level?
Posted: Thu Sep 21, 2006 10:18 pm
by mikec
What are you using to determine how much boost you're producing? Maybe your boost gauge is off?
Posted: Thu Sep 21, 2006 10:20 pm
by All_talk
What are you measuring the pressure with? Most automotive gauges are only accurate within +/- 2-3 psi, might just be the gauge.
Gary
Posted: Fri Sep 22, 2006 3:10 am
by IronMonkeyL255
Maybe.
I am judging it by my Autometer boost gauge, and I can't check how off it is since VRG3's scantool won't sync up to my ecu.......
Posted: Fri Sep 22, 2006 3:40 pm
by free5ty1e
Yeah, higher elevations seem to result in fuel cut at a lower MAP sensor reading, mine was at 13psig at sea level, and up here in Elko it was down to 10 or 11. I've found that I had to adjust my FCD's clamp voltage down from 4.2V to 3.9V in order to avoid fuel cut up here.
Posted: Sat Sep 23, 2006 1:28 pm
by Bane
where is your mbc connected?
has this been going on since the intercooler was installed or did it just start?