Engine Performance problem
2001 Chevy Monte Carlo 6 cyl Front Wheel Drive Automatic 164000 miles
I just got an new muffler. That day when I step on the gas it slowly accelerates. When it hits 30mph it will not accelerate no matter how much I push on the accelerator. If I let off the gas, then press on it again it slowly accelerates again. When the car does accelerate, it is very slow. Today it took me a mile to get from 0 to 55mph. I am not too car savy and have a lot of ideas running around in my head. I am looking to be pointed in the right direction.
Possibilities: Inspect and test all the following listed below: Oxygen sensor.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position sensor.
Crankshaft position sensor
Manifold absolute pressure sensor.
Fuel pressure regulator leaking or defective fuel pump.
False air leakage.
Foul/defective spark plugs.
Open spark plug wires.
Ignition coil/Coil packs defective.
Incorrect ignition timing.
Cap and rotor.