To all of those with an AFC...
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To all of those with an AFC...
I have an AFC on my 94 LS, and it seems to be making my car run lean. My fuel setup consists of....
RC 310cc Injectors
12:1 FMU
Walbro HP Intank
Airtex HP Inline
B&M FPR
Apexi SAFC
I would have thought that with the high disk ratio in the FMU I might be running rich but I am not. For the high throttle setting I set +40% fuel thru out the power band, and for low throttle I have it set to +15% thru out the power band, and I seem to still be running lean!
On my friends Si he can stall out his car by -35% fuel on low throttle, where as on my car I can subtract 50% fuel on low throttle, and the car will still run! So do you guys think I wired it to the ECU wrong? Can you guys stall out your car by subtracting such a large amount of fuel at idle?
The only way that I can check my A/F so far is by the AFC. My A/F gauge(autometer) isnt working hooked up to the ecu, so on friday I have to hook it up to the sensor. But on the AFC at full throttle it says +16.0% for my A/F reading....what the hell does that mean?? That is the only thing so far on my car that I can tell if I am running lean or not.
Any help would be greatly appretiated. Thanks Alot.
RC 310cc Injectors
12:1 FMU
Walbro HP Intank
Airtex HP Inline
B&M FPR
Apexi SAFC
I would have thought that with the high disk ratio in the FMU I might be running rich but I am not. For the high throttle setting I set +40% fuel thru out the power band, and for low throttle I have it set to +15% thru out the power band, and I seem to still be running lean!
On my friends Si he can stall out his car by -35% fuel on low throttle, where as on my car I can subtract 50% fuel on low throttle, and the car will still run! So do you guys think I wired it to the ECU wrong? Can you guys stall out your car by subtracting such a large amount of fuel at idle?
The only way that I can check my A/F so far is by the AFC. My A/F gauge(autometer) isnt working hooked up to the ecu, so on friday I have to hook it up to the sensor. But on the AFC at full throttle it says +16.0% for my A/F reading....what the hell does that mean?? That is the only thing so far on my car that I can tell if I am running lean or not.
Any help would be greatly appretiated. Thanks Alot.
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Re: To all of those with an AFC... (niedejb)
Damn I cant stall mine out with stock, or the RC 310's...does any one have an exact wiring diagram for a 1994 Integra LS??? Thanks.
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Re: To all of those with an AFC... (DLB1994)
i did not know u could get A/F reading off the afc
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Re: To all of those with an AFC... (Jamison)
Something is wrong, because:
A. You should only need an 8:1 or 6:1 FMU with those injectors.
B. When I ran an 8:1 FMU with 310cc, it had to be leaned out with the AFC, not richened.
c. I would look at your fuel pump. Make sure nothing is wrong there. BTW - depending on how much boost you are running, I am not sure if even the Airtex can supply enough pressure.
A. You should only need an 8:1 or 6:1 FMU with those injectors.
B. When I ran an 8:1 FMU with 310cc, it had to be leaned out with the AFC, not richened.
c. I would look at your fuel pump. Make sure nothing is wrong there. BTW - depending on how much boost you are running, I am not sure if even the Airtex can supply enough pressure.
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Re: To all of those with an AFC... (mplex2000)
Something is wrong, because:
A. You should only need an 8:1 or 6:1 FMU with those injectors.
B. When I ran an 8:1 FMU with 310cc, it had to be leaned out with the AFC, not richened.
c. I would look at your fuel pump. Make sure nothing is wrong there. BTW - depending on how much boost you are running, I am not sure if even the Airtex can supply enough pressure.
A. You should only need an 8:1 or 6:1 FMU with those injectors.
B. When I ran an 8:1 FMU with 310cc, it had to be leaned out with the AFC, not richened.
c. I would look at your fuel pump. Make sure nothing is wrong there. BTW - depending on how much boost you are running, I am not sure if even the Airtex can supply enough pressure.
The only strange thing about this is that when I put the AFC at -10% fuel at low throttle then, you can hear the whole car start to really bog down. Then when I go lower around -35% fuel it really starts to run "choppy", and sputters really bad, but then the ECU ompensates for the fuel and starts dumping it back in. I dont get it. The AFC if hooked up correctly should be able to stall my car in a sec. But it wont. I had it all the way down to -50% at low throttle, and the cars idle was still at 750 on the dot!
If someone can please give me some insight on what the problem could be, than please help. I dont wanna do any unnecessary damage. Thanks for all of the help ahead of time.
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Re: To all of those with an AFC... (Jamison)
Maybe the AFC unit is bad, if your friend has another AFC try switching the head units and see if that helps. Just a thought
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Re: To all of those with an AFC... (dwilson)
Maybe the AFC unit is bad, if your friend has another AFC try switching the head units and see if that helps. Just a thought
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Re: To all of those with an AFC... (Jamison)
Have u tried to just initialize the AFC to put it back at stock settings and then start all over. If u do that it will take the AFC out of the equation and let u know if something else is the problem. With just the 12:1 FMU and 310 u should be running hella rich.
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Re: To all of those with an AFC... (dwilson)
Have u tried to just initialize the AFC to put it back at stock settings and then start all over. If u do that it will take the AFC out of the equation and let u know if something else is the problem. With just the 12:1 FMU and 310 u should be running hella rich.
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