Your valve timing is off
The o2 sensor is not reading properly causing the system to go very lean.
On a Lexus IS300, the O2 sensor signal can typically be found in the engine bay, connected to the exhaust system. The upstream O2 sensor is located in the exhaust manifold or just after it, while the downstream sensor is located after the catalytic converter. You can access the wiring harness connector for the O2 sensors by following the exhaust pipes and locating the sensors. For precise identification, consulting the vehicle's service manual is recommended.
They typically screw into the exhaust manifold and have an electrical connection. They're easy to remove/replace, but sometimes getting to them can be a little difficult.
The two primary methods of sensing incoming engine airflow are the mass airflow sensor (MAF) and the manifold absolute pressure (MAP) sensor. The MAF sensor measures the mass of air entering the engine, providing data for fuel injection and ignition timing. In contrast, the MAP sensor measures the pressure within the intake manifold, which can be used to calculate airflow indirectly based on engine load and RPM. Both sensors play crucial roles in optimizing engine performance and efficiency.
Newer oxygen sensors are heated for accuracy. If the heater element goes bad the oxygen sensor doesn't work and needs to be replaced. If you have an oxygen sensor heater malfunction, it just means that the oxygen sensor has failed.
A low voltage O2 sensor typically refers to an oxygen sensor that is providing a voltage reading below the expected range, often indicating a problem. This could suggest issues such as a malfunctioning sensor, exhaust leaks, or fuel mixture problems, which can lead to poor engine performance and increased emissions. Diagnosing the root cause is essential to ensure proper vehicle operation and compliance with emissions standards.
The oxygen sensor is located in the exhaust manifold before the catalytic convertor. If you look down between the radiator and the exhaust manifold a few inches before the exhaust pipe connects to the exhaust manifold you will see the Oxygen sensor. The sensor will have 2 wires coming from it and it kinda looks like a sparkplug stuck into the exhaust manifold. There is 2 nuts that hold the oxygen sensor into the exhaust manifold.
By "exhaust manifold sensor" do you mean the O2 or oxygen sensor? The only sensor I know of on a exaust manifold is the O2 sensor and if you follow the manifold you will see 2 sensors sticking out they will have (usually) green wires coming from them
In the exhaust manifold behind the engine.In the exhaust manifold behind the engine.
Screwed into the exhaust manifold.Screwed into the exhaust manifold.
In the exhaust manifold on the back of the engine.In the exhaust manifold on the back of the engine.
02 sensor is either in exhaust manifold, or in exhaust pipe between manifold and muffler
exhaust manifold
your oxygen sensor should be located on your exhaust manifold or on the exhaust pipe near the exhaust manifold, Make sure your engine is cool before placing your hands on the exhaust manifold, It can be very hot!
Bank 1 oxygen sensor is the closest to the engine exhaust manifold. It is usually can seen and replaced if necessary with open hood.
oxygen sensor is found either in exhaust manifold or in actual exhaust pipe between manifold and muffler
it is in the exhaust manifold,or exhaust pipe...
It is on the exhaust manifold. If you look down at your exhaust manifold there should be one plug sticking out of it. That's the O2 sensor.