My truck has had an odd hesitation that started a few weeks ago. To me it feels like a bad spark plug, wire or COP. I have tried to test and narrow it down, but looking for some thoughts.
Truck has 55k on it. Mods are K&N intake/filter, Gibson dual exhaust, 2017 Duramas hood (full ram air hood) and a Diablo tune. No other mods besides tires.
The hesitation only happens after the truck is warmed up. When it is cold, it doesn't do it. It is a slight hesitation/stuttering. Doesn't matter if it is going up a hill or flat.
I have changed the plugs (replaced with stock) and changed the wires (again with stock). Really don't want to waste $400 on a set of COPs unless I need to. Cleaned the K&N. All this made it a little better, but it still happens. I reverted back to the stock tune, it didn't change anything. Tried running it in trailer-mode, still happens.
Thoughts?