2001 Mazda 626 Hesitating

2001 MAZDA 626
94,000 MILES • 4 CYL • FWD • MANUAL
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TONY 01
  • MEMBER
  • 2 POSTS
My 2l Mazda 626 sport hesitates intermitently between 50-70 mph.
Any speed lower than 50mph or higher than 70 mph its fine.
Any ideas
Regards Tony
Feb 8, 2010 at 10:27 AM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Inspect and test all the following listed below:

Oxygen sensor
Catalytic converter
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)
Dirty or worn spark plugs
Bad plug wires
Weak ignition coil
Cap and rotor

Note:If it doesn't apply disregard.
Feb 9, 2010 at 12:08 AM
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TONY 01
  • MEMBER
  • 2 POSTS
Thanks razmataz
Basically check the car.
Should keep me busy for a few hours.
Feb 9, 2010 at 6:10 AM
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