on my S-AFC2, my max AFL only goes up to 35%, wot in 3rd gear... straight pipes to stock cat, 5/6th port should be working... any idea what it could be? i have the stock air box with k&n filter

also, after installing the safc, it tends to have a miss at idle if i let off the throttle, it owuld idle around 800... but if it idles around 900 it is smooth....


any clue?
thanks

 

what is your afl at idle?

 

Threads merged since the topics are basically the same.

 

Push the afm's vane all the way aft and see what it will read fully open.

Missing at idle? Enrichen the lowest setting by five percent or so.

 

hailers.... that is a damn good thing to try.... gonna try that right now...

 

i just did it
it says 54.7% pushed opened all the way with my hand....
that is not good... huh?
it says it is 0.8% when the car is on idling
it is set at 4 cyl pointing up, flap 6 in 6 out... 91 s5

 

back to top
what readings do you guys get when you manually push the flap all the way open?

 

did the sensor check, here are the readings for the AFL

key on, 3.8
idle, 3
wot, 3rd gear pull, .53

 

bump

 

No that 54 percent is odd. I have a series four with the door/vane/flap and get close to 100 percent.

Go to SETTINGS and see what the voltage is with the key just to ON.........then see what the voltage is when you hold the vane?? fully in. The voltage for the afm, not the tps or boost sensor.

You might want to recheck youf wiring to the SAFC. In particular the afm signal wire that you cut in two. The part of that wire FROM the afm should connect to the SAFC WHITE wire and the part of that wire that goes to the ECU should be connected to the SAFC's YELLOW wire.

Sometimes its small stuff like that, that gets turned upside down, sideways, and just needs a little straightening out.

 

What you MIGHT want to do, if wiring is correct, is to turn the key to ON. Then slowly push the vane all the way in and hold it for a minute or so, then let it return to close for a minute or so. Do this about five or so times and see if the percentage changes from what you started with at the start of this thread.

The 0.8percent sounds like mine at idle.

 

just checked the wiring, got it correct... and then i also tried the push vane thing, and the percentage still stayed at 54.6% when it is wide open

here are the numbers

key on, 3.8v
idle, 3v
wot, 3rd gear pull, .53v

the sensor 2, is about .065 idle and .025 as low as i could get it

 

the reason you only show 54% at WOT is because the safc is a multi platform unit. when you think about it, that SAFC has to be programmed to go on ANY car with ANY type of AFM, so the SAFC has to be programmed to deal with the possibility of dealing with higher airflow levels on different cars. so, you AFM isnt the problem, mine also shows .8% at idle. i would check for vacuum leaks, and foremost a compression check to deal with misfire at idle.

verify the connectors are all clean AFM-harness harness-ECU and also check your safc hook up. did you solder the connectors? or use the 3m clips which are the devil and should burn in snotty hell.

pm me if u need help. im always here :-D

edit: i could be wrong too.. lol. sooooooooooooooooooooooooooooo... my thoughts are to check the connections first before you read my rant. lol.

 

i think the misfire at idle is due to the throttle stop... or something like that

if i let go of the throttle, it will idle around 800, the whole time, but if i touch it a tiny bit, it would bring it up to 900 and stay there...

probably got that now since i snap my throttle shut with no dashpot


i get 54% NOT at wot... when i manually push the vant all the way in... i get 33 ish WOT....