Hello everyone, my problem is that almost a year ago my car (Corolla 95 automatic 7AFE engine) started with very soft first pulls, they did not show up continuously, however currently it is continuous, very annoying and occurs when I drive forward, no in idle and parking. I have tested changing ECU, TPS sensor, MAP, cleaning injectors and even changed the fuel pump and regulator. All this has been because the mechanics in my area do not find the fault or simply do not want to grab the car for diagnosis because they do not want to complicate. lately I did a test and bought an oscilloscope, the first thing I identified was that the alternator was failing since it gave an average of 14.2 v of charge, however it had voltage peaks of up to 18 v, I originally thought that this was the problem that my auto, however the pulls continue, change the voltage regulator and the alternator portadiode, if this voltage tests were made which is already constant (average 14.2) and the amperage was measured by oscilloscope with the car stopped and running, I it gives amperage between 5 and 13 amperes, however eventually an amperage peak of up to 80 v appears, very sudden and uncommon (I will put picture). later I went on to evaluate the CKP sensor which goes great the oscillogram (I will put photo), I went to the injectors, I have video and photos of the behavior of each injector, it has the typical form but I have compared with some videos and a little theory and the shape of the waves of the injectors is very straight, it does not have the typical form of closing of the coil or it seems that it does it of delayed form. It is in this situation that I would like your help, since the 4 injectors have this shape and according to what I have read, it means that the injectors are not closing properly, what makes me strange is that they are 4, my doubt is if I could be a problem of the injectors (damaged by the high voltage delivered by the alternator when it failed) or if it is a problem of the ECU that is sending the ground signal erroneously. Simultaneous voltage and amperage test on the injector is missing. Files: https://www.dropbox.com/sh/qp5mnqnedn2cuxo/AABWkC0QEz7-Y5k7VZDMcr-Ra?dl=0

Good afternoon, friend I rule out a fault in the ignition, coil, spark plug wires and spark plugs ...

Hi, sorry for the delay, I kept track of the amperage peaks that the alternator gave, I checked the 3 wires that reach the alternator voltage regulator, L, S and IG, I found one of the "IG" wires checking the diagram electric says it only receives battery voltage when you open the switch, however the cable brings ground when the switch is not open, something you should not have, the test lamp turns on slightly, which indicates that the earth is weak but is present . I followed the wiring to the first connector and to the fuse box where it leads to a "relay integration" when disconnecting these connectors the earth is lost, in the same way I was following the power of the same and at this moment I detected that there is a relay called " power main relay "that when disconnecting it also loses the ground the" IG "cable of the alternator, I guess this comes from further back, at this moment I am at this point I hope to move forward tomorrow to identify why this cable has ground, maybe more wires that they are receiving land and this is causing the failure