What else can I do?

Question

I have a p0301 code on a cadillac cts 05. I have replaced all the spark plugs and 5 of the ignition coils. Cylinder 1 was misfiring before I did the work. It used to shake at idle pretty bad but after the work we put in it runs much smoother. There is still hesitation if I give it gas and it shakes a little at idle still. CHeck engine light flashes when I give it a little gas goin down the road. I'm thinkin to check the injectors next. Any thoughts?

Answer 1

Injector #1 is probably the next step, but if possible, try to perform a compression test, just to make sure there are no blown gaskets.