I've lived with the low power and pickup up to now, but the new twist in this is that the miles per
gallon on the car is now slowly dropping - and that was a wakeup call that something was
really wrong.

any ideas what could slowly be going bad ?

thanks...

 

Man, that could be absolutely anything. Kind of a broad subject. It could be something simple like spark plugs, wrong ones, or plugs going bad. They could have a lot of deposits on them. How do they look? Could one or more bad plug wires. I would also check the oxygen sensor. A bad sensor could really screw up your fuel mixture and affect performance and mileage. Could be a clogged converter. That'll really bog things down. But it could also be something as serious as lost compression. You could be losing compression in a couple cylinders. You may want to have that checked also.