I have a 1996 Mercury Grand Marquis. I live in IN and I came to OH for the holiday. My car was driving fine until I got to OH and I had to have it towed to Cleveland. It would not maintain a speed of 60mph, it dropped to 30mph. I had put the car in the shop and the guy told me it was a tsu sensor and that I needed a tune up. I had that done on Sat. and on Sun. I was going home and it took me 30 miles out of the city and started to drop the speed. My check engine light is not on and when I'm driving on the streets the car does fine. I took the car back to the shop, now he is telling me it's the fuel pump & fuel filter. He said my car is only pushing out 20 specks when it should be pushing out 80 specks. I need a second opinion on this but I'm low on cash. I'm not a macahanic & I don't want to keep putting money into the car if it's not fixing the situation. PLEASE GIVE ME SOME ADVICE.