Hey everyone -
I bought my 04 Grand Prix used with about 130k miles. I put new plugs and wires in, cleaned the MAF and the throttle body, replaced air filter, and a new fuel filter as well. The car got great mileage right after the new fuel filter but has since averaged right around 18-20 mpg. The car hesitates a bit when I accelerate and idles a little rough.
I'm thinking that i might need to replace or service the fuel injectors -- but I'm not sure. I wanted to see if any of you had some knowledge or thoughts that you could share with me. Tire pressure is around 35 psi.
