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2001 Lexus IS 300 bogging down during accelleration

Tiny
WILDMAN47
  • MEMBER
  • 2001 LEXUS IS 300
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 60,000 MILES
When I give it gas, it doesn`t want to go.
The check engine light is not on.
It gets worse when I go above 3500 RPM`s
I have been having problems with my brakes.
Friday, August 28th, 2009 AT 5:37 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Oxygen sensor/s
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)

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
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Friday, August 28th, 2009 AT 6:33 PM

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