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 Post subject: fuel psi ?
PostPosted: Tue Apr 14, 2009 9:00 pm 
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Joined: Sun Nov 02, 2008 9:45 pm
Posts: 44
Location: St Louis MO (North County)
So mods are... 16g.550's custom front mount 10lbs of boost gm mass air 3" with MaFT... and fuel pressure is 40psi at idle and wot 30lbs .. the car doseint brakeup anymore due to me fixing all the rusty ground and hacked up wireing install...

Is 30psi to low ?

I was thinking of puting in a walbro but just wanted to check


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 Post subject: Re: fuel psi ?
PostPosted: Tue Apr 14, 2009 9:28 pm 
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2nd Banana
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Joined: Wed Dec 28, 2005 1:16 pm
Posts: 9369
Location: San Diego, CA.
Quote:
So mods are... 16g.550's custom front mount 10lbs of boost gm mass air 3" with MaFT... and fuel pressure is 40psi at idle and wot 30lbs .. the car doseint brakeup anymore due to me fixing all the rusty ground and hacked up wireing install...

Is 30psi to low ?

I was thinking of puting in a walbro but just wanted to check
You're not supposed to have LESS fuel pressure at WOT than at idle. It's supposed to go up with boost. Either there is something wrong with your fuel pump, or your regulator, or both.


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 Post subject: Re: fuel psi ?
PostPosted: Tue Apr 14, 2009 10:13 pm 
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Member

Joined: Sun Nov 02, 2008 9:45 pm
Posts: 44
Location: St Louis MO (North County)
Quote:
Quote:
So mods are... 16g.550's custom front mount 10lbs of boost gm mass air 3" with MaFT... and fuel pressure is 40psi at idle and wot 30lbs .. the car doseint brakeup anymore due to me fixing all the rusty ground and hacked up wireing install...

Is 30psi to low ?

I was thinking of puting in a walbro but just wanted to check
You're not supposed to have LESS fuel pressure at WOT than at idle. It's supposed to go up with boost. Either there is something wrong with your fuel pump, or your regulator, or both.

looks like its time for a walbro and a fuel rail and a reg... ughh.. o well dsm fun.
I sware this dsm is costing me more then my regal.


Last edited by rollinunknown on Tue Apr 14, 2009 10:15 pm, edited 1 time in total.

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 Post subject: Re: fuel psi ?
PostPosted: Tue Apr 14, 2009 10:14 pm 
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2nd Banana
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Joined: Wed Dec 28, 2005 1:16 pm
Posts: 9369
Location: San Diego, CA.
Quote:
Quote:
Quote:
So mods are... 16g.550's custom front mount 10lbs of boost gm mass air 3" with MaFT... and fuel pressure is 40psi at idle and wot 30lbs .. the car doseint brakeup anymore due to me fixing all the rusty ground and hacked up wireing install...

Is 30psi to low ?

I was thinking of puting in a walbro but just wanted to check
You're not supposed to have LESS fuel pressure at WOT than at idle. It's supposed to go up with boost. Either there is something wrong with your fuel pump, or your regulator, or both.

looks like its time for a walbro and a fuel rail and a reg... ughh.. o well dsm fun.
You can leave the rail and regulator alone, just upgrade the pump.


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 Post subject: Re: fuel psi ?
PostPosted: Sat Apr 18, 2009 12:30 am 
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Joined: Thu Apr 16, 2009 3:01 am
Posts: 2
Location: NW
Your fuel pressure should be around 42 at idle, and go up from there. If it decreases, you need to check to see if your vaccuum lines are properly connected, and that there isn't some kind of leak. I would not drive the car until you find the issue especially since it appears that the car is having a lean condition when you are in boost. If you don't sort it out, then you'll be paying for more than fuel upgrades.


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 Post subject: Re: fuel psi ?
PostPosted: Mon May 18, 2009 11:22 pm 
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Newbie

Joined: Sat Jan 24, 2009 9:48 am
Posts: 22
Location: Kgn Jamaica
http://www.wheelsjamaicahost.com/wheels ... oard=111.0

just to give you guys an idea of whats going on in Jamaica :weedman: :weedman: with 4th Gens especially
We got Evolutions :prayer: :prayer: here since the original :finga: :finga: so if you guys need any info and "JDM" stuff you can look us up
plus yo ucan always come for the racing :axe: :axe: and stay for the girls :heart: :heart:


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