Mechanics

MASS AIR FLOW SENSOR/

1998 Mazda 626

Engine Performance problem
1998 Mazda 626 4 cyl Front Wheel Drive Manual

My car start jacking while on motion as if the fuel system fails. It does not accelerate well, I thought my fuel filter is blocked & I replaced it. The problem continues until the car finally stop, I have change the fuel pump, Ignition coil & the problem continues. Later, I change the air flow sensor or AIS. But it runs but not effectively. Please I need to know what next?
Avatar
TUNDE
April 16, 2010.



Lack of acceleration, chugging, hesitating, bogging etc. Could be caused by one of the following below.

Inspect and test all the following listed below and get back with some results

Oxygen sensor.
Catalytic converter.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle 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.

Rasmataz
Apr 16, 2010.