low max AFL and idle miss
#1
low max AFL and idle miss
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
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
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#10
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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.
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.
#11
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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.
The 0.8percent sounds like mine at idle.
#12
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
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
#13
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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.
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.
Last edited by rs_1101; 03-01-05 at 10:42 PM.
#14
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....
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....
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immanuel__7
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