haha ill just pm you

so if ur running rich with an afc and huge injectors on an oem map, and then u get a 3 bar map .. it will help to lean the a/f ratio right

why not just use the afc to lean it out?

well i dont have a wideband yet..and im running 40lb accels with a fmic and afpr...and damnit bobby my safc is like -43 1000 -42 2000 etc etc.. and im still fouling the plugs...so will the 3 bar map help lean it out

sounds like your injectors are way to big. from my understanding a 3 band map sensor won't help you at all

well...i know the injectors are to big and im dumping in two much fuel and not enough air...but if i got the 3 bar map sensor wont the fuel be cut down by the ecu and the air pushed more? just correct me if im wrong.

air isn't pushed during the majority of driving, its drawn (vacuum). whats your fuel pressure set at? drop it 10psi and see where you stand on your AFC. you really should get a wideband to help you with the tune. Until you do, tap into your front O2 sensor and watch it's voltages.

well i got a narrowband... but instead of one light being just lit up..theres like 6 or 7 and they go from lean to rich from lean to rich constantly they never sit still... and also if i go into the sensor check on my safc theres numbers on there moving can you tell me what the numbers mean i think one is my o2...

its like thrtle
IN
out

also everytime i ease into and then get to like 40 % throttle then push it to like 60% it does the flooding noise and a big puff of smoke comes out my exhaust


oh and my base fuel pressure is like 43 should i turn it down to LIKE 15-20 and then adjust my idle with my safc. that willl help run alittle lean right and i can jack the AFC correction back up

get a wideband. that narrowband is crap

+1 It is IMPOSSIBLE to tune with a narrowband. Narrowband A/F gauges are nothing more than a light show.

I do agree that it is useless for tuning. but it will at least tell you when your running lean and your cars gonna blow up

Not really. They are so inaccurate that you would be running waaay leaner than it would read and vice versa. By the time your gauge read a dangerous level, it would be far too late.

it should always cycle from lean to rich like that. It's how narrowband sensors work, they never send a steady signal unless you are WOT and they go into closed loop.

what do you have to adjust fuel pressure? AFPR or fmu? what fuel pump?

oh if i had the money i would have had a wideband already...but right now i jus cant find 200... but as for the narrow band my friend said my o2 sensor was bad he said only one of the lights on the gauge is supposed to light up but mine always has like 6 or 7 light up at the SAME time like a big blob of lights and yes i know theyre off cuz it just goes from one side to the other...i have 40lb accels with a craptech hahn fpr and a walbro 255

the blobs of light are normal with those sensors. your friend either doesn't understand the narrowband sensors or is used to a WB. either way, don't listen to him. When you go wide open your narrowband will give to readings within 1 AF which is close enough to get a decent tune. your Hahn fmu is really dumping fuel d/t those large injectors. you really need to consider a 1:1 AFPR (non-ebay) to help get things right.

ok im thinking aermotive 1:1 but what should base fuel pressure be on 420a... and also i cant even get wot if i put it past 70 % it just sputters real fast and real bad and acts like a rev limiter and im pulling out like - 40 % on the afc...it wont even hold an idle on 0

base fuel pressure is 50psi. how much boost are you running? whats your spark plug gap?

sputtering, puffs of smoke, etc are signs of detonation. Don't push the issue until you get it figured out or you're going to end up with a blown engine

My fuel pressure base right now is like 30 any higher than that and my afc will not lean the afr out. I am running like 7 psi right now because I took off my ML and I am waiting to get my FCD. I dont wanna put it up on 14 or and fuel cut since I am so lean on my safc... BUT I just bought new spark plugs like autolite copper cores or something and gapped them at .50 and it freaking ran like like GOOD..but I figure its only gonnna be a matter of time before them plugs are fouled out.....

you have no missing link and no FCD? so your MAP, which is only supposed to see vacuum, is reading boost? That's issue #1 that needs corrected

yeah...i guess it was just the spark plugs cuz it ran good all day yesterday......it didnt miss one time..lol..but yeah i took off the missing link because it was like over a year old and i wanted to run like 25 pounds now....but how good are the symtech lab FCD's ...will they protect up at like 25- 30psi on a s16g from fuel cut