That said, if you are determined to bypass the sensors on your 4Runner, there are a few things you will need to do. You must remove the intake assembly and disconnect the sensors from their respective connectors. Once the sensors are disconnected, you must plug the holes where the sensors were inserted with a suitable material such as rubber grommets.
Bypassing the sensors can lead to several problems. First, the engine may run too lean or rich, which can reduce power and fuel economy and increase emissions. Second, the engine may not be able to compensate for changes in the ambient temperature or altitude, which can cause the engine to run poorly or even stall. Third, bypassing the sensors may void your vehicle's warranty.
For these reasons, it is strongly recommended that you do not bypass the sensors on your 4Runner. If you are looking to improve the performance of your vehicle, there are other, less risky modifications you can make, such as installing a cold air intake or a performance exhaust system.
