Mechanics

HESITATION WHILE DRIVING/ACCELERATION

2001 Ford Focus

Engine Performance problem
2001 Ford Focus 4 cyl Front Wheel Drive Automatic

hello I am a new member to this forum, I have a 2001 Ford Focus SE sedan with the 2.0 litre zetec engine and lately when I drive the vehicle on the highway, it tends to hesitate especially when I try to accelerate on a hill and the power just wouldn't kick in.I don't know if it's the spark plugs orthe air filter, and right now I have 148,000 miles on the car. Can you tell me what the problem could be. Thanks
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Jdb2010
September 1, 2009.




Dirty fuel injectors (cleaning the injectors often fixes this).
Bad MAP (manifold absolute pressure) sensor
Bad TPS (throttle position) sensor
Bad or dirty MAF (mass airflow) sensor
Low fuel pressure (leaky fuel pressure regulator or weak fuel pump)
Vacuum leaks (intake manifold, vacuum hoses, throttle body, EGR valve)
Bad gasoline (fuel contaminated with water or too much alcohol)

Sometimes, what feels like a hesitation is actually ignition misfire rather than lean misfire. The causes of ignition misfire may include: Dirty or worn spark plugs
Bad plug wires
Weak ignition coil
Wet plug wires

Tiny
Rasmataz
Sep 1, 2009.


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