ECU two injectors fail to open

[VeryFastSnail]

hello, I have this Opel Astra ecu (picture attached) and the problem is that it fails to send signal to injectors, two injectors works fine, and other are failing, one gives low signaling, and another is always opened. (testes with Oscilloscope). what could be the problem?

[hesham10]

did you try with another one and problem solved ? do you have same units known to be faulty (parts replacement) ? if yes open ecu and give clear pictures .

[VeryFastSnail]

The problem is that I do not have replacement unit. Tested wiring and injectors itself, both good. attaching pictures.

[VeryFastSnail]

New pic with heat sink removed, will draw diagram of it soon.

[hesham10]

i think this ic near two yellow capacitors but not sure ... in last picture ... behind white connector not red connector ...

[VeryFastSnail]

It's Delco 55199 chip injector controller. Do you think it's bad?

[hesham10]

just try another one

[ollync]

Injector driver 100%


Sent from my iPhone using Tapatalk Pro