04-25-2020, 06:31 AM
(04-25-2020, 03:55 AM)Lord Popgun_imp Wrote: Well, first test. One probe on Bl/R and one on Bl/Y. Both probe ground leads connected to battery negative terminal.
Both traces show a square wave pulse train that comes up, then goes away. I am taking video’s and that I can email and someone can post them if they want. I AM NOT a videographer. I’m am using my iPhone on a stand. Due to test setup I can’t really watch the scope and reach the key. So, I start the video, turn on the key and wait for a response.
Interestingly, the pulse train does not appear until the fuel pump is done cycling. This is consistant every time I turn on the ignition. EDIT: not true. on the second run they showed up before the pump was done cycling.
The second run was interesting, but I messed with the scope and kinda messed up the video. So I’ll run it again in a while.
There are two shocking things I did not expect in my case. The pulse train goes from - 12v to 12v (was expecting from 0v to 12v). On opening throttle from zero the pulse train appears again for less than a second, and this is what I don't understand. I put one end of the probe in Bl/Y and the other in Bl/O, in other words, measuring what the coil is receiving. I believe this pulse train on opening throttle is somehow screwing the position of my valve. If you want you can send the video to jose.maria.miranda.castillo@gmail.com so I can post it here with a youtube link!