data logging a stock ecu??

[bumble zee]

is it possible??? i want to do this so i can tell exactly what my engine is doing instead of going by fuel pressures, and a a/f guage. anybody done this?? this is on a 81zxt ecu

[SleeperZ]

The data you could log will not tell you the information your gauges will. You cannot measure fuel pressure, mixture or exhaust temperature from your ECU - you need the gauges.

 

However, you can get a portable multichannel oscilloscope, like a Fluke graphical multimeter, and measure injector duty cycle (from the injector signal), timing advance (from the tach and the CAS), and airflow, at least the AFM signal - you could tell if it was maxxed out.

[Guest zrl]

what do you want from the ecu?

firing and fuel injection time? these are the only major control signals that ecu will send out.

 

if you want other input signals: O2, air/fuel/engine/exhaust temperatures, pressures, rpm, speed, and etc, the ecu won't tell you. you have to get them from these sign lines.