Here are the waveform captures. I was limited on time and scope channels. So, you have proof of #1 TDC on the leading edge. I lined up the cursor on it and the injector leading edge. The trailing edge of the injector waveform never changes position, but the leading edge does with commanded on time. Surprised me how much injector lead time there was.
optispark capture 1.jpg
optispark capture 2.jpg
optispark capture label cycles.jpg
Even though it says Jeep Grand Cherokee, I assure you it was on my 95 caprice wagon. That was the vehicle I was working on before I ran out to my vehicle to do this.
Whoops! it looked like I left the coupling to the red injector signal on the AC voltage setting. the high line is supposed to be 13.5V, the low dip is close to zero volts, the peak kickback voltage is around 60v.
Reply With Quote
Bookmarks