I hope someone can help or had this problem before, I started getting a miss in my 2016 Chevy Truck 5.3 L. It has continued to get worse. I have changed spark plugs, wiring, coil packs, checked for vacuum leaks. So far nothing has fixed it. It does not throw a code, I got it to throw one time with it was missing bad, P0300. Multiple misfire it said. I’m thinking it has to be something with fuel. IDK, any ideas???

 

Welcome to the forum. You need to post your issue in the appropriate truck section of the Forum where you will get more views. This is the Welcome New Members section of the forum.

 

Check for a faulty fuel pump or a stuck AFM lifter—both are common on that engine. A dirty mass airflow sensor is another possibility.

 

I assume you mean check fuel pressure to see if producing proper pressure? I’ll check Mass Air

 

There was 2 questions in that last post. I didn’t give enough info

 

I appreciate your advice, it has gotten really bad now. The TCM light is coming on sometimes it’s so bad