Buick Repair Questions? Ask a Mechanic for Answers ASAP
hi there ,
Im cam and ill try to help you out.
Do you have access to a scope at all?
the only way to see if this injector is firing is by scoping the feed wire and comparing the pattern to another injector.
A injector firing should take about 1 amp to fire. IF it is anything lower than it is either the injector driver inside the computer or the wiring from that cylinder to the computer.
I would also scope the ignition coil too, and compare it to the other cylinders.
Problems like this where you have replaced the plugs, coil and injector requires a scope to go any further.
If i can be of any more assistance id be happy to help!