I have a serious problem that no one seems to be able to figure out. For the last 5 or 6 months my car spits, spudders, and stalls when the temperatures get above 210 degrees. The car runs perfectly fine untill it reaches that temperature. I first took it to my local dealer and they ran the computer on it and said that the fuel pump was bad so I sunk money into that and the next day the same problem arrived. The next option my mechanic said to try was plugs and wires so I did that as well, same problem. I put a 180 thermostat in it to help keep the running temperature down but that didnt help either. I just bought a 160 thermostat but everyone on this page says that if you dont have a supercharged or stroker motor you dont need that. I cant figure it out and I need HELP

 

Stock thermostat is a 180*.

Maybe you have a bad O2 sensor or something?

 

Where is the O2 sensor and how do you check if it is bad

 

Look into replacing your coil as well. I know a few people who have had the same problem with intermittent studdering only when the engine is warmed up. Turns out the coil gets somehow heatsoaked and causes those symptoms.

 

O2 sensors are on each of the exhaust manifolds. If you have a dual-cat car, you have a third O2 after the cat.

 

Where is the coil located and how do you test or check to see if it was bad. Thanks alot for the information.