About Mark Bisig Expertise I have been working on Chevrolets since 1979 and do all minor and major repair of these vehicles. I work at a large Chevrolet dealer. I can answer questions on engines, transmissions, drive-line, A/C, PCM, drivability. I will do my best to answer and get back to you fast.
Experience 26 years working at a car dealer
Education/Credentials Denver Automotive and diesel college
Question I have a 99 Chevy Lumina that recently has begun to "buck" and hesitate when I step on the accelerator. When this happens I can not go faster than 10 mph. I have replaced the air filter, fuel filter and added fuel injector cleaner to the gas tank. A local repair shop said the OBDII codes were for the MAF Sensor and Catalytic Converter (Under threshold).
I'm not convinced that either of these will fix the problem. Can you help?
Answer Hi Steve, the cat- con can cause this problem but it won't go away so you could drive the car. It would be there all the time. Check your ignition coils where the plug wires go on for corrosion. To check the MAF you can just disconnect it and drive it.
