.:HSTuners::

06-22-2002, 03:24 AM

Hi guys, here is the story,i had a Td04(Impreza Turbo)in my car, but now its broken,short story. When that happened, i left my car naturrally aspirated,but with my Low comp.pistons and stuff,my car was a little slow,so by this time isold my Apexi VAFC to a friend who was needing it that day,so i told to myself, its ok, i can buy it again with this money!So i replaced my old turbo with a AR60 Garrett stage 2(ball bearing hybrid turbo for Hondas)and its awesome,it pulls a little upper than the other,i mean i got just a little bit more of lag, but its perfect. But......remember i sold my VAFC, so my car is just running 5 psi, and it feels like shit,i dont like it, i know i need the VAFC back but thats not my question, my question is why exactly=??????
I have a better turbo, i have a Bosch fuel pump, that i didnt have.So why my car doesnt feels like it used to???Why do i need a Fuel management unit===???????

06-22-2002, 03:26 AM

whats this chart for???

06-22-2002, 06:45 AM

Exactly, you do not have anything to increase the fuel pressure to those injectors. The VAFC did that for you before. Either buy another VAFC or a FMU. That Bosch fuel pump is not enough by itself. It will allow you to have more fuel pressure in the system, but it will not provide that pressure itself.

thermal · 06-22-2002, 02:31 PM

hhhmmmm.....you may just have to re-tune your fuel setting and FMU even without the VAFC. VAFC is not boost dependent. all it does is fine tune your A/F ratio throughout the REV band.

06-23-2002, 10:37 AM

I need an idea of what it is doing and when in the rev range.

06-24-2002, 04:00 AM

I start the car, go into 1st and it pulls great for 5psi, you now,it pulls so fast taht i cant tell if its getting leaner or what, of course i think thats happening,shift to 2nd, and there i can see my Air/Fuel Ratio gauge in the lean line,so much, that it goes from stoich to lean and i see no more lights in the gauge, its like if itis so lean, that it cant detect anything!!!and there and in 3d,4th and 5th i know the car is better than N/A but not enough,i dont feel it ok, so my AFC is coming, i just want to know why this shit happens and if i should put my car in the garage and wait for my afc.

06-24-2002, 08:26 AM

With that POS autometer a/f it better be FULL RICH at WOT or you are leaner than ****. Even if the gauge reads full rich, on a wideband o2 it will probably still be lean for real. It needs serious help or the motor will blow!

06-25-2002, 01:23 PM

So do you have a FMU or anything to enrich fuel under boost? I havent heard you mention it or see it in you list of mods. You are without a doubt running lean if you dont have one.

thermal · 06-26-2002, 05:27 PM

it looks like he has a vortech fuel regulator, but he might have meant FMU......

06-29-2002, 01:03 PM

Either way it definantly sounds like a fuel problem. Try adjsuting some more fuel in the car and see what happens.

06-22-2002, 03:24 AM	#1
maumusic Posts: n/a	Help Here!!!Moderators!!!or anyone! Hi guys, here is the story,i had a Td04(Impreza Turbo)in my car, but now its broken,short story. When that happened, i left my car naturrally aspirated,but with my Low comp.pistons and stuff,my car was a little slow,so by this time isold my Apexi VAFC to a friend who was needing it that day,so i told to myself, its ok, i can buy it again with this money!So i replaced my old turbo with a AR60 Garrett stage 2(ball bearing hybrid turbo for Hondas)and its awesome,it pulls a little upper than the other,i mean i got just a little bit more of lag, but its perfect. But......remember i sold my VAFC, so my car is just running 5 psi, and it feels like shit,i dont like it, i know i need the VAFC back but thats not my question, my question is why exactly=?????? I have a better turbo, i have a Bosch fuel pump, that i didnt have.So why my car doesnt feels like it used to???Why do i need a Fuel management unit===???????

06-22-2002, 02:31 PM	#4
thermal Banning Machine Join Date: Aug 2001 Location: My Garage, Va. Posts: 5,547	hhhmmmm.....you may just have to re-tune your fuel setting and FMU even without the VAFC. VAFC is not boost dependent. all it does is fine tune your A/F ratio throughout the REV band. __________________ Project Teg Visit the Turbo Forum

06-24-2002, 04:00 AM	#6
maumusic Posts: n/a	ok, its like this... I start the car, go into 1st and it pulls great for 5psi, you now,it pulls so fast taht i cant tell if its getting leaner or what, of course i think thats happening,shift to 2nd, and there i can see my Air/Fuel Ratio gauge in the lean line,so much, that it goes from stoich to lean and i see no more lights in the gauge, its like if itis so lean, that it cant detect anything!!!and there and in 3d,4th and 5th i know the car is better than N/A but not enough,i dont feel it ok, so my AFC is coming, i just want to know why this shit happens and if i should put my car in the garage and wait for my afc.

06-26-2002, 05:27 PM	#9
thermal Banning Machine Join Date: Aug 2001 Location: My Garage, Va. Posts: 5,547	it looks like he has a vortech fuel regulator, but he might have meant FMU...... __________________ Project Teg Visit the Turbo Forum

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06-22-2002, 03:26 AM	#2
maumusic Posts: n/a	whats this chart for???

06-22-2002, 06:45 AM	#3
97CivicFerio Posts: n/a	Exactly, you do not have anything to increase the fuel pressure to those injectors. The VAFC did that for you before. Either buy another VAFC or a FMU. That Bosch fuel pump is not enough by itself. It will allow you to have more fuel pressure in the system, but it will not provide that pressure itself.

06-23-2002, 10:37 AM	#5
Boosted3g Posts: n/a	I need an idea of what it is doing and when in the rev range.

06-24-2002, 08:26 AM	#7
97CivicFerio Posts: n/a	With that POS autometer a/f it better be FULL RICH at WOT or you are leaner than ****. Even if the gauge reads full rich, on a wideband o2 it will probably still be lean for real. It needs serious help or the motor will blow!

06-25-2002, 01:23 PM	#8
Boosted3g Posts: n/a	So do you have a FMU or anything to enrich fuel under boost? I havent heard you mention it or see it in you list of mods. You are without a doubt running lean if you dont have one.

06-29-2002, 01:03 PM	#10
Boosted3g Posts: n/a	Either way it definantly sounds like a fuel problem. Try adjsuting some more fuel in the car and see what happens.