need some help i think something is wrong

[86_sports_1jz]

i've been trying to tune my car for the past two days but it seems like when i take fuel out with the safc II at wide open throttle it does nothing. when i have the afc all set to zero my a/f ratios are in the 8-9s at wide open throttle but when i take out anywhere from 30-50% it hardly does anything, still in the 9-10s. but when i tune partial throttle, the afc and wideband are both very sensitive and seem like they are working correctly.

could it be that i maxed out my injectors or maybe there is something wrong with my injectors, can anybody help me out???

mods are stock 1jz
pt70 at 15 psi but also tried tuning at 9 psi
fmic
stock injectors
stock soarer ecu
255 walbro
4 inch exhaust
afpr set to 37-38 psi

 

[86_sports_1jz]

forgot to add i have no o2 sensor, what is it like when you max out your injectors? does the motor start to lean out cuz there isn't enough fuel?

 

[86_sports_1jz]

o... and what do the stock injectors look like? are they yellow?

 

[OneJSupra]

stock injectors are yellow.

 

[tissimo]

im going to go with safc is hooked up wrong

 

[86_sports_1jz]

i'm pretty sure its hooked up right but i'll double check. but if it isn't hooked up right then why does the afc respond when i take fuel out or low throttle? for supras when using the afc to pull out fuel is it supose to be +20% or +30%? then when adding fuel are the numbers suppose to be -20% or -30%? because thats backwards from my friend's srt-4

 

[tissimo]

when you pull a % out (-10% for example) you are reducing fuel.

So you've been adding 30%-50% fuel and you havn't hit fuelcut? do you have a BCC or FCD wired after the afc?

 

[Zazzn]

on stock injectors i was able to do about 430-440 WHP out of the 370's with FPR jacked up on a walbro...

Sounds like if nothing is happning on the s-afc you may have it hooked up wrong.

 

[SPD TRP]

i'm pretty sure its hooked up right but i'll double check. but if it isn't hooked up right then why does the afc respond when i take fuel out or low throttle? for supras when using the afc to pull out fuel is it supose to be +20% or +30%? then when adding fuel are the numbers suppose to be -20% or -30%? because thats backwards from my friend's srt-4

Correct me if I am wrong, but you have been adding fuel thinking you are taking it out and taking it out thinking you are adding it.

Try this, go the the low table correction at around the idle speed, then add fuel (+XX%) and see what the wideband does, should go rich <14.7, then do the opposite--take fuel away and see if it goes way lean >14.7. If it does what I am telling you--IMHO your afc should be wired in correctly. If anyone sees this as flawed, please by all means chime in.

Wayne

 

[cruzinbill]

no o2 as in no wideband or no stock o2... because if you are trying to tune without your stock o2 you are dumb and dont deserve to have your car anyway.

 

[86_sports_1jz]

when you pull a &#37; out (-10% for example) you are reducing fuel.

So you've been adding 30%-50% fuel and you havn't hit fuelcut? do you have a BCC or FCD wired after the afc?

man my afc is all backwards then, for example if i turn the afc knob to -30% it feels like its adding fuel cuz the car starts booging out. but then i turn the knob to +30% the boog goes away. if the car runs lean it shouldn't boog out right?

i also check my afc and its hooked up right. what about the settings where should they be at? like the sensor type and the sensor numbers? and whatever other settings i should look at to make sure they are set right

 

[86_sports_1jz]

Correct me if I am wrong, but you have been adding fuel thinking you are taking it out and taking it out thinking you are adding it.

Try this, go the the low table correction at around the idle speed, then add fuel (+XX%) and see what the wideband does, should go rich <14.7, then do the opposite--take fuel away and see if it goes way lean >14.7. If it does what I am telling you--IMHO your afc should be wired in correctly. If anyone sees this as flawed, please by all means chime in.

Wayne

i tried that. when i -15% the wideband says its getting rich but when i +15% i leans it out. could it be my wideband is messed up or is there something wrong with my afc cuz i bought it used like a year ago and never used it

 

[86_sports_1jz]

no o2 as in no wideband or no stock o2... because if you are trying to tune without your stock o2 you are dumb and dont deserve to have your car anyway.

come on man i'm asking nicely for help. if you don't have anything positive to say that could possibly help me you should just keep to yourself. if you had a thread like this i won't get on and bash on you.

anyways if i don't have my stock o2 sensor in would it effect my car that much?

 

[cruzinbill]

Im sorry to come off sounding like a dick its just rediculous anymore to see people trying to tune cars with halfass wiring.. things missing.. stuff like that. Get everything to make the car run right to begin with. Yes you need a factory o2 sensor. your ecu has no idea if your car is running rich or lean. so its kinda winging it. Tho you stated above you have a wideband. good on you for that. but even with a wideband your ecu still needs a o2 sensor. wich if you dont have the stock one hooked to the ecu that maybe why its actin funny. again sorry bout bein a dick, but i read about your no o2 right after hearing a guy bitch about his 1j was a piece of shit cus he was boostin 20+ with no fuel control or anything and blew the turbos and messed up a few other things....

 

[86_sports_1jz]

Im sorry to come off sounding like a dick its just rediculous anymore to see people trying to tune cars with halfass wiring.. things missing.. stuff like that. Get everything to make the car run right to begin with. Yes you need a factory o2 sensor. your ecu has no idea if your car is running rich or lean. so its kinda winging it. Tho you stated above you have a wideband. good on you for that. but even with a wideband your ecu still needs a o2 sensor. wich if you dont have the stock one hooked to the ecu that maybe why its actin funny. again sorry bout bein a dick, but i read about your no o2 right after hearing a guy bitch about his 1j was a piece of shit cus he was boostin 20+ with no fuel control or anything and blew the turbos and messed up a few other things....

its alright thanks, where can i get a new replacement o2? do the o2s off the 2jz work? if so then maybe i can just get one from autozone or something like that

 

[cruzinbill]

are you using the soarer harness or supra. im not sure if the o2 plug is differant is why i ask and mine is a soarer. I will check and get back to you on it.

 

[86_sports_1jz]

are you using the soarer harness or supra. im not sure if the o2 plug is differant is why i ask and mine is a soarer. I will check and get back to you on it.

i'm using the soarer harness

 

[Datsrboi]

come on man i'm asking nicely for help. if you don't have anything positive to say that could possibly help me you should just keep to yourself. if you had a thread like this i won't get on and bash on you.

anyways if i don't have my stock o2 sensor in would it effect my car that much?

Actually.... he's right.

I do not why your even touching your safc when you know your 02 sensor running to the stock ECU is missing.... I mean your wideband is not plug up to your ECU.. Your ECU has no way of monitoring the output of the exhaust fume and correcting itself. So regardless how much fuel your removing or adding, your ECU is trying to save the motor by dumping fuel...

Get a stock 02 sensor in and try again. Because what is a 02 sensor there for right?

 

[86_sports_1jz]

where can i get a replacement? and what kind of car will it come off of then?