My name is Dale.
If you would be so kind as to answer a few questions for me I think we can resolve your power and performance issue with your vehicle fairly easily and without spending a lot of money.
How long since the fuel filters have been replaced?
Have you noticed that the engine on acceleration blows out a lot more black smoke out the tailpipe than it use to ?
Does the engine use any appreciable amount of crankcase oil?
Do you have access to a good auto parts store and/or a Walmart store in your area/
What Country do you live in?
How long and what weight and Brand of Motor oil do you run in the engine?
So, give me a little bit more information and I will try to help you.
Have a Blessed & Productive Day!
I am just waiting for the information.