My car is chugging very bad won't go over 10 mph 97 stratus?

If it's putting out black smoke when it acts like that it's probably a stuck injector. Otherwise, run a computer diagnostic test and a compression test.

#2, It could be the oxygen sensors, if that is the case then it will run OK until it warms up. if its the injector it will run bad all the time. we assume you have checked the air filter for signs of plugging up and that the air intake from the outside is clear, the little critters love to nest where they are not wanted, a clogged catalytic converter is a possibility, buy new or take off and bust up the element in the converter and store in a sealed bucket . busted element is worth about $100 to the right reclaim shop.