Opel Rallier since 1977
No improvements except for an adjustable fuel pressure regulator... put it to stock with known new and or good parts. Wanted to try it that way. Checked and measured every piece, replaced a bad temp coolant sensor, and installed new injectors. Adjusted the arm calibration on the airflow (AFM) door for best running. It wants to be lean between around 50 to 90% thottle and gets really lean nearing 90%. For the last 10% of the throttle range, the WOT indicator switch on the throttle shaft activates, and the computer pours in extra fuel, and the mixture is what it needs to be, so it takes off great if you floor it. If you enrich the system for that 50-90% range to work better, then it tends towards too rich at idle and light cruise. Without a schematic, I can't see for sure where to change a resistor or 2 in the ECU or AFM to make that range run better.So what did you do to improve the system?
I put in a Torquer cam and that 50-90% lean throttle range went leaner, I got that adjusted better with the AFM and the fuel pressure, but it is obvious that the more cam is put in, the worse that lean area gets. I have read that the stock mapping was tilted towards lower emission and fuel economy. Any decent carb setup has a better mid to heavy throttle responsiveness.
So am heading towards putting 2x DCOE45's on the engine now; need to put them to use!