Question about 2000 Nissan Maxima
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Posted on Jan 02, 2017
Electronic throttle assembly failure, which has throttle position sensor built into it, that is a sensor for the transmission and tells the computer where the throttle is to adjust/shift if needed. I would look into the throttle assembly.
Posted on Oct 15, 2008
simple test to know if the catalytic converter is clogged. Only a clogged cat could cause this kind of issue,, so as you try to go faster the problem would get worse because the presuure would have no way out. So to test a clogged cat you unplug the oxygen sensor and put in a pressure gauge. Ask the mechanic if he did this and if the pressure was well above 3psi. For you to have issues right off the line the pressure would have to be around 15 to 30 psi as soon as he reved up the motor. Or if you unplug the 02 sensor from the exhaust and drive the car and still have the same problem then the cat is not the cause. By creating a hole before the catalytic converter this allows the pressure out and if the cat was clogged the car should run better.
Personally I suspect you need spark plugs, or spark plug wires, or possibly a coil, or you may even have a clogged injector. Your discription of the symptom sounds like an ignition issue. If it only stumbles on accel but runs smooth at higer cruising speeds I would suspect possble a vacuum leak at the intake gasket or possible a clogged injector.
My point here is before you replace a catalytiic for a drivability issue only, you have to have excessive backpressure to cuase a drivability concern. Even if a catalytic was old and worn out and did not clean up any pollutants, which is its main purpose, the car would still drive just fine. It would just polute.
Posted on Jun 15, 2010
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