Sunday, November 28, 2010
Saturday, November 27, 2010
O2 Feedback Box - Power FC
The setting here relates to the INJ map. Any cell with an INJ value below the setting value will be subject to O2 feedback/correction provided the function is turned on.
Before I showed how most people use the INJ map, for fuel adjustments, and then ReCelc Base and set all the values back to 1.000. As you can see, this will make every cell in the map subject of O2 Feedback Control if the function is on and the default setting value is used.
You need to pick the setting value so that you are only applying O2 feedback correction to cells very near stoichiometric. I use a value of 1.035, which corresponds to a commanded AFR of 14.2:1 (assuming 14.7:1 as base AFR value).
This would work well when using the INJ map as a target AFR table.
However, in practice this function works extremely poorly. It is very slow to respond and wildly overshoots stoichiometric.
I find that at idle, the car will fluctuate between 12.5 and 16.5 AFR with this setting turned on. Unfortunately, the settings that control the response of this function are protected and hidden on the Power FC.
On more advanced ECU's such as the AEM EMS, these functions are tunable.
Since the function essentially doesn't work, I just leave it off permanently. With the function off, you no longer have a real consideration with how you use your INJ map.
Before I showed how most people use the INJ map, for fuel adjustments, and then ReCelc Base and set all the values back to 1.000. As you can see, this will make every cell in the map subject of O2 Feedback Control if the function is on and the default setting value is used.
You need to pick the setting value so that you are only applying O2 feedback correction to cells very near stoichiometric. I use a value of 1.035, which corresponds to a commanded AFR of 14.2:1 (assuming 14.7:1 as base AFR value).
This would work well when using the INJ map as a target AFR table.
However, in practice this function works extremely poorly. It is very slow to respond and wildly overshoots stoichiometric.
I find that at idle, the car will fluctuate between 12.5 and 16.5 AFR with this setting turned on. Unfortunately, the settings that control the response of this function are protected and hidden on the Power FC.
On more advanced ECU's such as the AEM EMS, these functions are tunable.
Since the function essentially doesn't work, I just leave it off permanently. With the function off, you no longer have a real consideration with how you use your INJ map.
Thursday, November 25, 2010
IACV - Decel (like hitting the brakes)
The IAC also has a lot of control over how the car decelerates. If you disconnect the IAC, the engine braking is much more. You let off the throttle, and it is like you hit the brakes. This is because the IAC is not allowing any air at all into the engine and it would prefer to stop.
ELD - Idle Up 100 rpm
On the USDM GS-R, the ELD only kicks the idle up by 100 RPM (750 to 850). So does the power steering switch and the A/C compressor
Wednesday, November 24, 2010
Pomen
Bro/Sifu,
My Kancil got this problem just after doing the top overhaul of my Engine. Went into the same pomen/mechanic and he said something about oil seal leak etc. after all that he had done, its still leaking. my last drive just 2300km and the indicator warning already on. need second opinion from other sifu out there.
TQ for your reply
My Kancil got this problem just after doing the top overhaul of my Engine. Went into the same pomen/mechanic and he said something about oil seal leak etc. after all that he had done, its still leaking. my last drive just 2300km and the indicator warning already on. need second opinion from other sifu out there.
TQ for your reply
Saturday, November 20, 2010
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