Sorry for this being long. I've bolded and numbered the specific questions below to aid in answering. Just to let you know, the reason I am trying to alter the Fuel Compensation tables is because my car runs like utter crap when it's cold (pig rich) but runs AWESOME once it's warm because I tuned it after it got warm. I think that the tables that came with my base calibration are not good enough, otherwise I wouldn't be running into this problem.
1) Can anyone give the definitive on the BEST way to go about altering the Fuel Compensation Tables? It seems as though there are too many variables to consider at one time.
2) If your engine is in the middle of the temperature colums for both IAT & ECT, where would you start adjusting first - IAT or ECT compensation?
3) And how would you know by how much?[/b]
See how the engine's constantly changing environment makes it very difficult to narrow down exactly where to make the adjustments? This is my dilemna, too many variables to adjust at the same time -- Light vs. Med. vs. High Load, AND -- Air vs. Water Temp (All at the same time!)
4) Does the light vs. med vs. high loads correspond directly to the Target Lambda settings in Options>Settings tab?[/b] If so, at least this narrows down that variable a little.
5) When I do finally figure out how to alter these correctly, am I trying to target the same "Target Lambda" settings as I've been doing, or am I trying to get a richer/leaner mixture than optimum?
6) Are the adjustments cumulative? In other words, if your IAT compensation is set at +10% and your ECT is set at +10%, at that given point, is the computer adding +20% of fuel, or does one override the other?
Thanks in advance. Once these questions are answered, I'm sure this thread will make a good reference to others in my same situation.
Altering the Fuel Compensation Tables
High load is wide open throttle, medium load is accelerating but not at wide open throttle, and light load is cruising and very light throttle.
ECT should not change when it is cold out. The car should always run at the same operating temp. IAT is the only thing that will really be drastically changed in cold weather.
The IAT and ECT correction factors are added together, so 10% each would be a 21% increase in fuel overall.
ECT should not change when it is cold out. The car should always run at the same operating temp. IAT is the only thing that will really be drastically changed in cold weather.
The IAT and ECT correction factors are added together, so 10% each would be a 21% increase in fuel overall.
Ok great, but you failed to answer all of my questions, and question #2 I think was answered incorrectly. I'll rephrase it because it was probably confusing. I was talking about ENGINE temp there, not the temperature outside.
1) Can anyone give the definitive on the BEST way to go about altering the Fuel Compensation Tables? It seems as though there are too many variables to consider at one time.
2) If your engine is in the middle of the temperature colums for ECT, AND the temperature outside puts you in the middle of the ECT compensation tables as well, where would you start adjusting first - IAT or ECT compensation?
3) How do I know by how much I should adjust them?
5) When I do finally figure out how to alter these correctly, am I trying to target the same "Target Lambda" settings as I've been doing, or am I trying to get a richer/leaner mixture than optimum?
1) Can anyone give the definitive on the BEST way to go about altering the Fuel Compensation Tables? It seems as though there are too many variables to consider at one time.
2) If your engine is in the middle of the temperature colums for ECT, AND the temperature outside puts you in the middle of the ECT compensation tables as well, where would you start adjusting first - IAT or ECT compensation?
3) How do I know by how much I should adjust them?
5) When I do finally figure out how to alter these correctly, am I trying to target the same "Target Lambda" settings as I've been doing, or am I trying to get a richer/leaner mixture than optimum?