2002 Mazda 323

YOTAN27

MEMBER
2002 MAZDA 323
4 CYL
FWD
AUTOMATIC
154,000 MILES

HI, MY MAZDA 323F HAVING A PERFORMANCE PROBLEM, THE ENGINE IS JUMPING WHEN I WANT TO ACCELERATE, LOOSING POWER WHEN I DRIVING 60-70 MILES PER HOUR, IT IS NEARLY UNDRIVABLE.I WENT TO MAZDA SERVICE, THEY CHANGED THE COILS, THE FUEL FILTER, NOTHING HAPPEND, AND THE COMPUTER CANNOT FIND ANY PROBLEMS!CAN YOU HELP ME, PLEASE

1 Reply

RASMATAZ

MECHANIC
75,992 POSTS

Possibilities: Inspect and test all the following listed below:

Oxygen sensor.
Catalytic converter.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position sensor.
Crankshaft position sensor
Manifold absolute pressure sensor.
EGR Valve
Fuel pressure regulator leaking or defective fuel pump.
False air leakage.
Fuel contamination.
Foul/defective spark plugs.
Open spark plug wires.
Ignition coil/Coil packs defective.
Incorrect ignition timing.
Cap and rotor.

Note:If it doesn't apply disregard