P0303

I have a 2011 4cyl Tacoma that has had a misfire fire. Sometimes the truck works fine, but then it will go into limp mode and I’m stuck at 25mph.

I’ve replaced spark plugs, ignition coils, fuel injectors, checked compression, relieved sec cat, and had the fuel injectors graphed. I’m not sure where to go next with it. Has anyone else ran into this problem

 

Try swapping coils and see if the misfire moves. 0303 is for cyl 3 IIRC, so maybe swap 1 & 3.

Someone is going to ask compression results and brands of coils / plugs you used (as well as sourse) because of multiple reported problems with faux parts from Amazon.

 

Other than having a scope on the Injector and Ignition control wires.
I'm not sure where to go from here.

A scope will allow you to see if something is dropping out when this happens.