Marquis Jerking/Heating and then runs fine until it happens again

SOME MORE INFO: After the Mechanic fixed, I had check engine light flashing the next day and the day after the check engine light is on. Check engline light goes off sometimes and comes back and sometimes flashing. Another important point, the problem would start when car was floored and also if it goes over bumps! but now it starts whenever irrespectively.

ok sounds like your fuel filter is stoped up.it could be a sticking thermostat,blown head gasket,check oil on dip stick see if it is milkey looking,if so head gasket,if not replace thermostat,temp sensor would not cause this.also the water pump could be going bad.another thing to do is have a pressure test done on colling system,the radiator,has plastic tanks on both sides one may be cracked loosing collent while driveing,the pressure test will show a leak good luck,let me know how it goes.

I had a similar problem with my last vehicle, a 94 Dodge Caravan. I could be scootin down the road..doing fine. Then out of the blue,it started sputtering and acting like it was gonna run out of gas. I decided it had something to do with my fuel system, more specifically, the feul pump. Well, I took it to 3 shops, trying to get a consistant report. The results were unanimous. I had a "weak" fuel pump. It turns out the pump was getting too hot, causing the fuel system to shut down. Scary. Anyway, a fuel pump, an external fuel filter and problem solved..Hope this helps..

I check engine light came on and I took my car to have it checked out at auto advance and they said it was a thermostats stuck open. If I change the thermostat myself will the light go off on it own or would I have to get a cod put in?

I have a 2000 Grand Marquis and sometime when I'm driving it jerks also my heating and my air conditioner is not coming on at all can someone help me