Engine Performance problem
2001 Chevy Suburban V8 Two Wheel Drive Automatic 104000 miles
I just replaced the Fuel Tank pressure sensor and had the suburban's plugs changed and tune up at the dealer. Now the fuel sensor is bad and they want me to replace Fuel pump and sensor. (Big money). I have not done this yet. But since the tune-up the Gas mileage has dropped to about 12MPG avg city/hiway. Before Tune-up was Avg 17 to 19 City/hiway. Can you tell me what happened?
I do not have any engine lights on or codes that I know of. All this work was done after a misfire code came in P03? What can I do to get MPG back?
Saturday, September 6th, 2008 AT 9:56 PM