Misfire on cylinders 1, 3 and 5

[bigBADbenny]

Just as an update, I resoldered the pins of the injector driver chip, the one s for cilinder 1 which was seeing bad signal by applying the soldering iron tip on the small pins.
it is now running great since 4 month.
So I think the problem is solved.

That’s awesome, so good you got to it.

Did you use the ecu block diagram in the FSM to find the correct components?

[gui67]

In the service manual, the wiring diagram to see which pin and which connector the injector which was not opening is connected.
then I just followed the trace on the PCB. fortunately, the chip is just 1 or 2 cm from the connector. If it was on the other side, it would have been more difficult.

[bigBADbenny]

That’s great info, it seems the “first row” components are a potential fault location, but what’s the mode?

Eg insufficient solder flow during manufacture, or could flex from the adjacent ecu plugs play a part?