2000 Lexus RX 300

2000 LEXUS RX 300
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GODBLESSUSA
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Engine Performance problem
2000 Lexus RX 300 6 cyl

When I accelerate, the engine makes a rattling noise. Also, it feels like the engine is "hesitating" to accelerate, as though it has lost some of its power. I'm fairly certain something is wrong with it, I'm just not sure what.
Aug 12, 2010 at 10:52 AM
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RASMATAZ
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Lack of acceleration,chugging,hesitating,bogging,misfiring etc. could be caused by one of the following below:

Oxygen sensor.
Catalytic converter.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position sensor.
Crankshaft position sensor
Knock 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 it.
Aug 13, 2010 at 12:23 AM
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GODBLESSUSA
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Could you tell me some ways in which I could check some of the problems you mentioned? Or how to better understand what my engine is doing so I can eliminate some of the choices? Thanks!
Aug 13, 2010 at 10:36 AM
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RASMATAZ
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Could be pinging/detonating -Sounds like the knock sensor is not retarding the ignition timing, an EGR valve that's not opening or the engine is overheating/clogged catalytic converter
Aug 13, 2010 at 5:58 PM