ok here is my setup: 95 nonturbo talon with custom turbo (ghetto rigged) 270 cc fuel injectors from Han's Racecraft super fmu using a wideband to tune the sfmu so i don't need a fuel pressure gauge
the problem: when i start to boost...the sfmu wont build pressure...cause i when you start to boost the wideband is suppose to drop from 14.xx to a lower number...like 11.xx or 12.xx...cause that is a safe a/f ratio...
so if anyone knows whats wrong please inform me...if you need more info just post...
#99977, "RE: having some fuel pressure problem..." In response to Reply # 2
i've read alot of thread saying that if i'm using a sfmu on 95 talon/eclipse i should disable the stock fpr...is that true...what happens if i don't...
#99978, "RE: having some fuel pressure problem..." In response to Reply # 3
Originally posted by petervaj i've read alot of thread saying that if i'm using a sfmu on 95 talon/eclipse i should disable the stock fpr...is that true...what happens if i don't...
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......................................................................................................................... Built. That's All... ......................................................................................................................... www.monkeybuttpirate.com ......................................................................................................................... 2 Fingers of Scotch with a milk back... Stat!
#99990, "RE: having some fuel pressure problem..." In response to Reply # 4
Originally posted by djtrickee
Originally posted by petervaj i've read alot of thread saying that if i'm using a sfmu on 95 talon/eclipse i should disable the stock fpr...is that true...what happens if i don't...
#99997, "RE: having some fuel pressure problem..." In response to Reply # 6
The reason the Cartech FMU worked fine is because it utilizes the stock FPR to work and doesn't need to get rid of it like an SFMU does. Buy a fuel pressure gauge and make sure you are using the right ratio disc and spring combo in the SFMU to work with the injectors you have.
Mike D -------------------------------------------------------------------------------------------------
Originally posted by DR1665 You're welcome to all the beer you can drink, but you have to go get it yourself. Don't get pissy when we point to the fridge and tell you to get it yourself.
#99980, "RE: having some fuel pressure problem..." In response to Reply # 2
well everything was fine when I was using the cartech fmu. Every time it hit boost the a/f would drop all the way down to a 11.4 using the wideband. the wide band is not bad had it tested at the dyno. I'm just confused because everything was fine before. I didn't check fuel pressure yet. What about the three ports on the side of the sfmu? DO i need to hook up lines to them or what??
#99985, "RE: having some fuel pressure problem..." In response to Reply # 9
Originally posted by petervaj What about the three ports on the side of the sfmu? DO i need to hook up lines to them or what??
No you don't need to use them, as long as you have a vaccuum line going from the intake manifold to the top port on the sfmu
Make sure the screw on the top isn't backed out too far, otherwise fuel pressure won't rise. (I had this happen before) You really would benefit from a $20 fp gauge here just so you can test the sfmu to make sure it is raising pressure instead of going off the wideband.
I contributed to the Wiki! EVO IX - just a really expensive boost gauge and a K&N air filter 96 Eclipse RS -awaiting registration and inspection 95 Eclipse GS - parts car Mods/Profile - http://www.2gnt.com/index.php?d=cs82685
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that would take one hell'uva car to cause an explosion like that!
