Originally Posted by
maro
Thanks for the link!
Actually i have graphs somewhere proving that two sharp accelerations from idle resulted in roughly same throttle valve opening angle ~99% and same intake manifold vaccuum ~960mBar for same amount of time but with different mass airflow. One slowly building with hesitating effect and second quickly rising with space shuttle start effect.
What bugs my mind where ECU finds input data for calculating mass airflow when MAP (with integrated temperature sensor), temperature sensor after air filter and brake booster pressure sensor are disconnected.
Maybe it is just some fallback hardcoded map in ecu? But then it does not explain how the value could "predict" engine acceleration. It must be based on some other sensor's output giving real data not just some simulated vectors from Bosch test bench.
EDIT:
I found MAP covered with oil year ago. Since then i clean it on regular basis.