Quote:
Originally Posted by elise/europa
I found the source of trouble causing that I was not able to see online all gauges (or channel): my laptop. I still don't know exactly why. I just took a old laptop with direct RS232, and I was able to see the gauge.
With the possibility to see all channel, I was able to adjust the TPS, very important to control the idle. And now the idle is not so bad.
Still had difficulty with the start up, but my batterie is on charge. I saw that when I was cranking the engine, with a very low power into the battery, I lost the calibration of the TPS with the computer on-line...
Tomorrow I will go to a tuner to test more, and build one open loop map (for track), and based on that, I will build the close loop program for street (at the beginning).
The program is very easy, but I think it should be very nice to have a specific place to program the start mode, like the idle. It still not clear what the ECU is taking as parameter during cranking, like spark timing, crankng pulse (on fuel menu, and not adjustable based on air temperature). It is my major stress at the moment with the EFI, I am using my car on a large band of temperature (-10C to 35C), and no specific cranking menu will maybe not help me.
|
The cranking mode for spark and fuel are found in the spark constants and fuel constants. For exmaple, most engines favor a cranking limit of about 500 rpm, this is the threshold from crank mode to run mode. The fuel cranking value typically ranges from 4000 Usec to 6500 Usec (depending on injector volume). Once the engine is above the 500 rpm limit the ECU then defaults to the fuel map and the correction tables. For example, most engines will require a warm up enrichment curve. The base maps already come with a preset typical curve that may only need slight altering depending on your ambient conditions (extreme cold climate).
The non-DBW cars use the Idle Constants found in the file folder. Here you can adjust the target idle relative to water temp, and gain for the IAC motor. It is recommended that the closed throttle position is close to 10 Deg.
There is more information on this and more here
DRS Engine Control Support
thanks
Kris