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Extra Fuel compensation in Charge and AC
Posted: Thu Dec 09, 2004 7:41 am
by Dariusz
I like to know how I can make in the Rom editor that in the moment the AC is On or the Alternator goes On hard (Fans, lights, etc.) the ECU increase the amount of fuel to compensate this.
Thanks a lot,
Dariusz
Re: Extra Fuel compensation in Charge and AC
Posted: Thu Dec 09, 2004 2:40 pm
by turbosi92
Dariusz wrote:I like to know how I can make in the Rom editor that in the moment the AC is On or the Alternator goes On hard (Fans, lights, etc.) the ECU increase the amount of fuel to compensate this.
Thanks a lot,
Dariusz
There is no way currently to compensate for the AC, lights or anything like that. The ECU "knows" what to do is my assumption which is why it isn't address by the software.
Posted: Fri Dec 10, 2004 12:40 am
by shinociv
ELD -Electronic Load Detector
I'm not sure how it compensates but the ECU knows how much electricity your using. I think it adds fuel though.
Posted: Fri Dec 10, 2004 7:00 am
by Dariusz
shinociv wrote:ELD -Electronic Load Detector
I'm not sure how it compensates but the ECU knows how much electricity your using. I think it adds fuel though.
I think that, but in iddle if I start the AC and the lights, the A/F ratio go to 18:1 and only the IAC trie to compensate the RPM but not the fuel
I think that I need to add some fuel in the points where the mbars go if the AC or alternator go on...
Posted: Fri Dec 10, 2004 11:43 am
by Spunkster
Make sure you are not just seeing a voltage drop that is affecting your wideband.
Posted: Tue Dec 28, 2004 1:35 pm
by eRaceParts.com
Dariusz wrote:shinociv wrote:ELD -Electronic Load Detector
I'm not sure how it compensates but the ECU knows how much electricity your using. I think it adds fuel though.
I think that, but in iddle if I start the AC and the lights, the A/F ratio go to 18:1 and only the IAC trie to compensate the RPM but not the fuel
I think that I need to add some fuel in the points where the mbars go if the AC or alternator go on...
Okay, the ECU detects the additional load of A/C, lights, etc. Then it uses the Idle Air Control Valve to let in more air. So under normal driving conditions, the ECU and O2 sensors are running closed loop. Therefore the ECU detects the additional air from the IAC and injects the proper amount of fuel to maintain the A/F ratio. If your car is running open loop, this compensation will not function properly.
Hopefully this clears things up.