Hesitation/sputter low throttle between 35-50mph

I get it from time to time giving it a little throttle for slight inclines or maintaining speed starting around 35-40mph. I replaced the plugs thinking that may be it but still does it off and on. Anyone else have a similar issue they have found a resolution for?

 

Do you have a check engine light on? Have you scanned it for codes?

 

No check engine light so I have not checked for any codes yet.

 

Scanned for codes and nothing

 

Cleaned the throttle body today which by the looks of it was definitely needed. This did not fix my issue though. Seems to be getting a little worse. Any suggestions. Still no check engine light for anything. Can definitely feel it light bucking when it happens

 

Yo, mine was doing the same a few years ago. It was really bad. I was told to replace the spark plugs and the wires. Replacing the plugs worked for me so I never did the wires. Might try that next.

 

Ours are coil on plug so there are no wires. Typically if a coil was bad it would throw a code so I could track it down to which one.

 

Pull the coils out and look at the insulation for cracks or carbon tracking

Plug in a scan tool and look at fuel trims while driving