but car is running well, except when I first start it in the AM. The pickup is slow, but gets better once it warms up.

Any way to increase mpg? I've heard that I should be getting 28 mpg....

I've adjusted the valves, changed filters(by the way how often should one change the fuel filters?) could it be the injectors???

Thank you for any help, I've just bought the thing, It has 312k on it and I've already put in around an additional $1000.

Thanks again for any feedback.