Engine Performance problem
2003 Audi Cabriolet 4 cyl Two Wheel Drive Automatic 88,000 miles
I have Slow accelleration until 1800-2000 RPM then a miss until over 2000. Everytime this occurs. I had the injectors cleaned, using 93 octane, had coil check out and apears to be ok. I am running fuel cleaner through the gas tank with no improvment.
Hi richard.E. Merrill, Welcome to 2carpros and TY for the donation
Lack of acceleration, chugging, hesitating, bogging etc. Could be caused by one of the following 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.