S-AFC II help fast and now please!!!

[iknowyoulike]

Okay i got the diagram here: i followed it, i spliced all the wires, i didn't cut the air flow one though. i didn't know if i was supposed to cut it completely and tie one end to the white and the other to the yellow or just splice the airflow wire in 2 places and tie both yellow and white into the wire. so i did the splicing in 2 places and tied both to the air flow wire. After all that i followed the steps to take before firing (can someone run through that with me,With what they put and all Ex. the sensor setting/Arrow up,down, in and out settings etc.) i tried to start the car and it would not turn over....it cranks but it won't turn over..(Flooded with fuel???) So i took the S-AFC off and pulled the plugs and replaced them with some back up plugs and tried to crank it with out the S-afc connected ( Stock) and it turns over but boggs like crazy now i have to keep the foot on the gas to prevent it from dying and it smells like gas crazy gas it's obviously it runnning super rich now i guess but why would it do that..what's wrong with my car???? Someone help me please!!!!

Please tell me what's wrong with my car did the S- AFC2 change the stock A/F mixture? What about my car? if it is flooded with fuel what do i do?

help help help!!!!

[jab11185]

you didn't cut the airflow wire?

you're supposed to...the SAFC works BECAUSE of this....the airflow reading goes into the SAFC, it corrects it according to your settings and sends the modified airflow reading to the ECU

just splicing it in is probably causing some serious malfunction...cut the wire...do it the way they tell you to and get wire connectors so that's you can plug the wires back into each other if need be

[iknowyoulike]

okay now it's running super rich...what should the settings be at for the S-AFC to have it even idle i chech the senor testing thing and the volt looks to not even be at 1 the throttle volts works because it changes everytime i step on the gas. I don't know what to set the initial set-up to please help me!!

[jab11185]

what do you have for mods?

[iknowyoulike]

Stock motor,w/ drop in intake, test pipe and exhaust that's it as far as engine mods.

[jab11185]

your settings should have very little if any corrections in A/F...the stock ECU can probably compensate for minimal mods like that....

as far as setup goes you have it set to 4 cyl, and HOTWIRE and i believe the arrow points to the top right (been awhile since i set mine up)

[uncle_louie83]

one thing to do is make sure if its used...go into the fuel correction settings and make sure its not correcting your fuel. make sure you are in hotwire mode on sensor 1....also make sure your dec.air settings are at "****" for the first slot...ne1 should be 10.0% and ne2 should be 10.0%. when you are at the first screen when you fire up the car...does it had 4 viewings or 3...if it has 3 push the back button and choose 4 way monitoring...and as you push the gas see if it is correcting any fuel on the 4th table. if it says 0% the entire time then your golden but if its changing you need to go back into the settings and change your hi and lo points back to 0 thru the whole table....you dont need an safc til you go boost on your car...the stock ecu and fuel injectors can handle 7psi of boost with just a walrbo 255lph pump without any modifications so i think your bolt ons are covered....just words of advice....

lewis

[iknowyoulike]

What should i put for the hot wire in and out 1/1 or 5/5 i heard that stock is 5/5 correct?? and as far as sens. cal do i do 1/ or the 2/ave-2/add thing?

[uncle_louie83]

my hotwire settings are at 01 / 01.....or just 1....dont change them to something else...might not work right..here in a little bit i can go outside and go look at the settings and give you more info.

lewis

[iknowyoulike]

heres the numbers to my S-AFC so far

Hot wire setting 1/1in and out with 1/1 sens. calhi settings 0 throughoutlo setting 0 throughoutthrottle point 10% 23%NE Points 100016001800220034004000460052005800640070007600Dec Air settings **** 10% 10%

And as of right now with that settings that

[iknowyoulike]

My car is still spuddering fuel out the exhaust like the injectors are staying open for a long time...could it be my ecu got messed up the first time around when i installed it wrong? what types of settings should i put in to try and compensate for the large amount of fuel being pushed in?

[jab11185]

the ECU might be fried....did you run the airflow wire the right way?

double check MAF voltage, that could been messed up too...double check settings just to make sure

[iknowyoulike]

That's not good...how do i check the MAF voltage? And what should that number be at to be normal?

[Craving4Boost]

do you have a wideband?

[iknowyoulike]

This Thursday i will but now i'm just trying to get whatever electrical stuff i need installed, installed.

[rn240sx]

No offense to anyone, but do these guys even READ the install manual on these afc's..??

It seems like everytime someone install's one of these, they end up posting here with their problems...

When i installed mine, i had no problems at all. I slapped it in like the install manual said, adjusted the settings for the maf in and out, did this and that, cranked it up and it was all good. NO PROBLEMS..!!

The only problem i ran into was the dec-air feature.. That was a royal pain in the rear to get it right.. But now its perfect...

[iknowyoulike]

If i had the english one i would read it...plus the only availble pin out guide for the KA on Apexi website was down. all they have on there is an english translation of the instruction manual. Nothing on what to do or what not to do....plus i believe i've narrowed it down to either a problem with either my MAF or ECU. Im getting another ECU tonight to try hopefully that works. Anyone know how i can check my Maf to see if it's okay?

[iknowyoulike]

Im trying to figure out if it's the MAF or the ECU that's causing this problem with bad idle and causing it to run rich..i mean last night when it was doing this when i first installed it wrong. i uninstalled the afc hoping that it would return to stock settings but it didn't it stumbled like it has been now. so would that be that the ECU is now fried or that the wiring was wrong that it shortage the MAF?

[Craving4Boost]

dont worry about messing up installing the AFC, a lot of us ( including myself) have had problems. i know i get a lil paranoid messing with electrical stuff, the damage electrical things can do compared to hard parts is crazy. anyways try taking of the SAFC and cranking her up again, if it's fine then at least you know it's for sure the SAFC

[4felix20]

what year is your ecu? the diagram i had to use looks nothin like that for my 95.

[iknowyoulike]

4flix20-The diagram is for a the 89-94 i believe it is. I found it on Nico the only site left to have such things in their archives..Everywhere else you can't even find the Pin-out for the early model 240's not even on Apexi's site.

Craving4Boost- thanks for the reasurance man!! But i do believe it is now beyond the S-AFC being installed. I've tried to take it off and even then when i crank it, it does the same O' spuddering/stalling deal shooting out gasoline in the exhaust.

so i don't know what the deal is anymore. I just picked up another ECU from a buddy of mine it's a 93 auto KA(ECU#29) i tried cranking it. And nothing!!

now it wont even turn over.. it just cranks..maybe the plugs are foul now too much fuel throughout the day with me cranking it. But tomorrow after work im going to get new plugs and work on it again hopefully it cranks rite up. other wise im going to check the MAF. if anyone know what i should be checking for let me know.....Even if it's my head out of my ***!!

SERIOUSLY though what should i be looking for as far as if the maf is still good or not? any help please!!

[Craving4Boost]

a MAF sensor would not keep you from just starting up for motor, you have a real problem here. it could save you the hassle to just tow it to a friends shop that you know of (just because i hate random shops) and have them check it out. it could be out of your hands now

[4felix20]

what year is your car and is it an automatic? i'm looking at a 91-94 eccs diagram right now...

[AN89HATCH]

can every one conferm that that is the correct wiring diagram to wire the safc into an 89-94 240sx? I have a diagram that shows the throttle sensor in a differnt spot, mine shows it 4 pins to the right

also is the thr arrow suppost to point to the top right?

Modified by AN89HATCH at 9:55 AM 6/13/2005
Modified by AN89HATCH at 10:03 AM 6/13/2005

[iknowyoulike]

i swapped out the ecu for the auto one now she fired up idle sorta ok but still rough(running a little rich) this is after the ecu swap and i removed the S-AFC too...

i'm gonna change the plugs and wires tomorrow it sounds like a couple miss fire here...a couple back fire there..etc.etc. hopefully i can get it to run smooth again..the motor response to the throttle is super slow now and it sounds like a motorcycle too...it is possible I mess up the S-AFC as well?

I mean first i tried to start the car with the S-AFC still wired up to the ECU wires,but i just swapped the old ECU for the Auto one and that would just crank but wouldn't turn over...after i removed the S-AFC the car turned over....does that mean i could have messed up the S-AFC?

is it possible to mess that thing up...i mean it works as far as the power and monitoring, when it wasn't starting/ stalling it did still monitor stuff like battery voltage, throttle input, rpm so could i have messed it up or did i just mess up my old ecu...because i want to put the s-afc back on after i get the car to run like normal again and after the ecu relearns the mods i have....

[AN89HATCH]

it looks like your ground is in the wrong spot, i also have the wireing diagram like this one http://www.ka-t.org/forums/viewtopic.php?t=4383

[Craving4Boost]

if his ground was in the wrong spot it wouldnt turn on at all

[AN89HATCH]

so is there more than one spot on the ecu that we can use as a ground?

[Craving4Boost]

no i would assume only one wire is being used to touch the ground...you wouldnt want to try to plug the power into the ground or anything

[iknowyoulike]

i think i have the right diagram. it's just me not cutting the airflow wire like i said....but now i'm just hoping to get to even run without the afc...i'm gonna check the timing, knock sensor, the TPS and maf this weekend this car is crappy rite now.