How to Identify and Fix Common car Problems ?
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The RSX MAP sensor in your Acura is mounted to your throttle body, and it reads information about the air charge heading into your K series engine.
This sensor is connected by a 3 prong weather proof connector and is located on side of your throttle body assembly, to the right of your engine if you are looking from the front of the RSX.
your car fails to start: the engine`s computer uses the map sensor to gauge atmospheric pressure before the engine is started. a false reading could cause too much or too little fuel to be delivered to the engine. both conditions could keep it from firing up.
It is not advisable to drive your vehicle with the MAP (manifold absolute pressure) sensor disconnected. The MAP sensor`s job is to determine the load being placed on the engine and deliver fuel to the engine accordingly.
MAP Sensors
The sensor provides instant manifold pressure information to the engine`s electronic control unit. The data is used to calculate air density and determine the engine`s air mass flow rate, which in turn determines the required fuel delivery for perfect combustion.
Check the MAF sensor and clean it out with dry air. Then put it on and disconnect the battery for 12 minutes and hook it up. This will clear the computer to want to relearn itself. Then drive the vehicle and see what happens.
The O2 sensor will not cause the no start. The no start can be caused by the fuel pump or the ignition system. You should check the engine for spark and fuel pressure, when it is not turning on to help narrow the problem down.
Bad Sensors
Sensors that fail to send information to the computer may cause the engine to run less efficiently, and they can sometimes be the cause of an engine that won`t start. One common culprit for this problem is the crankshaft position sensor, which measures the position and speed of the crankshaft.
A faulty fuel rail sensor may send an inaccurate signal to the computer which may cause the engine to experience hard starting. The engine may take a few cranks longer than normal to start and in more serious cases may not start at all.
The short answer is “Yes,” your vehicle`s engine can operate without oxygen sensors. But without them, your PCM won`t know how much fuel to inject into the engine.
Yes, you can drive with a bad oxygen sensor if you can still start your engine and feel little difficulty driving. But don`t leave it alone for over a couple of days, as it might cause safety problems and lead to the malfunction of other parts of your vehicle.
The MAP sensor is normally accessible and quite easy to remove and reinstall. It is often located near the engine`s intake manifold, and should have an electrical as well as some way to measure the air pressure in the intake, either by a direct attachment to the manifold or via a vacuum hose.
The manifold absolute pressure sensor (MAP sensor) works with intake air pressure to define proper air and fuel quantities required for the ignition cylinders. The MAP sensor measures the vacuum of the intake manifold, which fluctuates according to engine load, relative to the barometric pressure.
You can use a bench test setup, which simulates the car`s electrical system and sensors, to connect your ECU and check its operation. You can also use a software tool, such as an ECU simulator or a diagnostic scanner, to communicate with your ECU and monitor its parameters, codes, and outputs.
Why do MAP sensors fail? Like most electric sensors, MAP sensors are sensitive to contamination. If the map sensor uses a hose, the hose can become clogged or leak and unable to read pressure changes. In some cases, extreme vibrations from driving can loosen its connections and cause external damage.
With the ignition on, the MAP sensor output should be around 5 volts. Start the engine and check the reading; at idle, the MAP sensor should read 1 to 2 volts. This indicates the MAP sensor is responding to changes in vacuum. Digital MAP sensors are best tested with an oscilloscope.
While a MAF sensor is always located before the throttle body, a MAP sensor can usually be found attached to the intake manifold. Because it is in the intake tract, A MAF sensor will also have its own housing (usually plastic) to hold it in place.
If you`re using a MAP sensor, then it should be calibrated. Most MAP sensors include a data sheet, that illustrate their voltage output based on the pressure they are exposed to.
While a MAF sensor is always located before the throttle body, a MAP sensor can usually be found attached to the intake manifold. Because it is in the intake tract, A MAF sensor will also have its own housing (usually plastic) to hold it in place.
What`s the difference between a MAP and a MAF sensor? A MAF sensor measures how much air is aspired by the engine. A MAP sensor, on the other hand, provides a measurement of the air pressure in the intake manifold. The ECU uses this information to calculate the amount of air that needs to be aspired.
This vehicle comes with a MAP sensor. This is located on the RHS of the engine bay near the strut tower.