My car was chugging and bucking after the motor warmed up. Our mechanic said it's likely the coil pack. Now that we fixed it, the engine light is still on. Can we turn it off by ourselves?

SOURCE: engine chugging

Sounds right. Either Coil pack(s) or MAF sensor. Buy one and swap it out until you find bad COP (coil on plug). Each spark plug has one and there is not really a good way to test under stress. MAF sensor is just past the intake air filter. You can buy a spray at the auto store to clean this, which may help. Don't touch the sensor itself (ith your finger) as this will ruin it. Just soak it with the spray.

SOURCE: car chugging

To determine what's wrong, u need to have the codes read. If the light is coming on, it is a signal that something is wrong w/ the emissions system. A code is stored in the cars computer that will indicate what the problem is. Most parts stores will read the stored engine codes for free. They plug a scan tool into a port under the dash to retrieve the code(s). Write them down, and ask what u should do to correct the problem. If u have any further questions after that, u can post them here. Let me know how u make out.

SOURCE: How do you change the ingnition coil for a 2003 chevy trailblazer

it would not be the ignition coil....injector cleaner could help it, most people add it to the gas to help maintain clean injectors and you should do the same. as far as the coil no leave it alone.

SOURCE: car is bucking, engine light on code po742

"Torque converter clutch" solenoid is stuck open which is causing your bucking problems. The solenoid is either disconnected or faulty. if you ran over something, it may have damaged the wiring, but if not, you need to take it in for checkup.

SOURCE: 2005 Kia Rio check engine light with no other symptoms

first you will have to find out what the light is all about it could be something as simple as a bad airfilter or something more complex like an o2 sensor you can go to auto-zone and they will check the light for free and tell you what the problem is once you do this if you like send me a message and ill tell you how to rectify the problem hope this helps you.

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