07/25/2017 at 10:10 •
Went over all the wiring, cleaned ground points and redid some suspected bad connections. After going over the datalogs and measuring signals with a multimeter, it seems that the wideband lambda controller is at fault and is displaying incorrectly. Unfortunately I don't have time for new components to be shipped to me in time, as I am leaving to study in the US. Car has been put in storage and the project will continue later. The future plan is to replace the O2 controller with a Spartan 2 OEM which is a low cost DIY controller designed to run the Bosch 4.9 lambda sensor, the one I already have.
As seen from the pretty graph above, the o2 sensor is measuring changes with throttle and rpm increases. But the digital display and analog controller output is displaying different signals, even after repeated calibrations.
06/23/2017 at 22:51 •
The car is currently running very uneven and rich. Did some spark testing and I have a strong suspicion the ignition system is not working as it should. When running an engine crank and cam shaft simulator called Ardustim the ECU looks to work as intended. Injection time has been calculated to be 12.7ms using one method and 12.2ms using a different formula, seeing as these are only about 5% apart from each other I cannot be too far off. Earlier in the project I have had issues with the wiring harness, this left me stranded at a gas station once as the starter actuator signal was missing. I believe the wiring was damaged when I removed or inserted the engine and transmission.
Hopefully there aren't too many more wiring issues, but we will see.