Commanded AFR issue please help!
03-17-2012, 03:01 PM
#1
Staging Lane
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Commanded AFR issue please help! Finished my heads and cam swap about a week ago. I drove the car over to a friends house and all the afr's were looking good. I just did some minor tweaks to the ve table on the way and everything looked good. It was ideling for awile when all of a sudden the afr's started going lean. I tried adding more and more fuel and it was like it wasn't doing anything to the afr. I limped it home and started checking everything!
Here it is a week later and I have literally gone through it top to bottom. The car runs fine, idles fine, everything is good other then the fact that if I take it out of closed loop the thing just leans out and no matter how much I add to the ve table, it just wont correct it! Even in closed loop, the fuel trims are all over the place (lean). I have tried going into maf only mode and tried correcting the fuel that way to no success.
Im at a loss if solutions at this point and the only other thing I can think of is something in the ecu just let go if that's even possible for one to do this. I have searched and searched for vacuum leaks ect. And no dice.
Is there possibly a ground or something in the ecu that would cause this? any help is greatly appreciated! Has anyone else had a issue like this or am I in a boat by myself here? I have even tried putting the stock tune in and put it in openloop and same scenario.
Fuel pressure is rock solid at 58psi
Here it is a week later and I have literally gone through it top to bottom. The car runs fine, idles fine, everything is good other then the fact that if I take it out of closed loop the thing just leans out and no matter how much I add to the ve table, it just wont correct it! Even in closed loop, the fuel trims are all over the place (lean). I have tried going into maf only mode and tried correcting the fuel that way to no success.
Im at a loss if solutions at this point and the only other thing I can think of is something in the ecu just let go if that's even possible for one to do this. I have searched and searched for vacuum leaks ect. And no dice.
Is there possibly a ground or something in the ecu that would cause this? any help is greatly appreciated! Has anyone else had a issue like this or am I in a boat by myself here? I have even tried putting the stock tune in and put it in openloop and same scenario.
Fuel pressure is rock solid at 58psi
03-17-2012, 09:02 PM
#4
Staging Lane
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No this happens no matter what IAT it's at.
A link to the log file and tune fiile can be seen here:
http://www.hptuners.com/forum/showthread.php?p=286644
A link to the log file and tune fiile can be seen here:
http://www.hptuners.com/forum/showthread.php?p=286644
