Check fuel pressure when the car idles.
bad switch off the steering column.
Thermostat would be my first guess, If not is a fan blown, do a radiator flush?
Mitsubishi eclipse is famous because of failing transmission. If I were you I would start with checking transmission fluid level. But most likely you will have to change transmission or fix one you have.
If it pops when turning it is most likely the CV joints.
Starting problems in a Mitsubishi Eclipse GST 1995 could be caused by a weak battery or an alternator that does not charge. You might also have gotten a bad starter when you replaced that one.
Could be a bad CV joint. It would make a popping noise.
No coolant in the system, failed thermostat, failed water pump, leaky headgasket.
It could just be a bad spark plug wire or the spark plugs need changing.
i have a 02 Mitsubishi eclipse gt v6 and the oil capacity is 4 quarts and 1/5...i don't know if this would help
Check the compression for the cylinders on the Eclipse. If there is?æa leak in one of the cylinders then this could cause the jerking.
I would Invest in a Haynes Manual.
just buy the ANY MAKE AND MODEL. when i asked for some for my 2001 eclipse they said that would be perfect.