I have tried in vain to do my due diligence in searching for this problem and am now asking for help.
The problem I am experiencing is my truck feels like it is misfiring under light acceleration and the problem is only getting worse. I thought it was bad gas at first and for the last year I am only putting in premium non ethanol. It has been a while since I last did a valve cleaning but it has been done. When the truck fully warms up it is not as bad but still present. I am not convinced it is not the trans. About 12k ago I changed the trans fluid JIC. No change. The truck runs and feels best when it is first started in the AM and run for a few miles. After that it starts bucking. There is no backfire or other issues. I am at a loss....
It is the worst in the warm up phase of the trans.
The only mod is a catch can and a Range AFM disabler
I did unplug the Range to see if that helped and it did not at all
Any help or suggestions are GREATLY appreciated!
Truck has 55k on it