Car sputters, more noticeable when AC is on - 2004 Chevrolet Aveo

Go to the auto parts and get a container of Heat fuel treatment and get a new fuel filter also. Then pour in the proper amount of fuel treatment and change the fuel filter. This should fix your problem. Also when was the last time you changed the air filter. This would help it run better and increase your mileage.

have amp load checked on ac compressor/

Check for vacuum leaks. Fill a spray bottle with a few drops of d/w liquid and the rest with water. Start and run the engine. Spray around all vacuum lines and areas to where hoses may be going. If the engine r.p.m. increases, that's where your vacuum leak is. Stay away from electrical.

I have a 1990 Buick Century with 3.3 v6. My car would sputter and the check engine light would come on and off while driving and the car would die when I came to a stop and tried to take off. I noticed my cooling fan turning on and off even when the car was not up to temp, and that is when the check engine light would come on. I changed the temp sensor and all is well.

u must check ur idling valve

you may be experiencing vapor lock you will have to open you gas cap from time to time in extreme hot weather to let some air into your tank.or have a gas line cooler installed on yur vehicle.

When your car acts up... tap on your Mass Airflow Sensor (MAF) and if your car idles fine and stops sputtering while doing this replace your MAF sensor.

tuneup either u have a bad plug wire or a bad plug sometimes the coil pac could be breaking down but im leaning toward tuneup.

Most auto parts stores Advance/ Autozone etc will get the diagnostics codes from cars computer and tell you why the light is on and what the problem is if there is a problem.





http://www.kiatechinfo.com/index.asp

Good source for Kia its free to register NO STRINGS

sorry to be the one but its your fuel pump.. good luck keith...p.s. try the filter first...