The crankshaft position sensor is positioned so that teeth on the reluctor ring attached to the crankshaft pass close to the sensor tip. The reluctor ring has one or more teeth missing to provide the engine computer (PCM) with the reference point to the crankshaft position. In this GM engin...
The Check Engine lamp has proven to be a great annoyance to many motorists (as well as your professional customers) because it doesn't tell you anything about the nature of the problem. The problem could be something serious or relatively minor. There is no way to know until you hook up ...
Oxygen (O2) Sensor: Located in the exhaust system, it measures the oxygen content to help maintain the ideal air-fuel ratio. Crankshaft Position Sensor: Tracks the crankshaft’s position and speed to adjust ignition and fuel injection systems accurately. Camshaft Position Sensor: Measures the timin...
For a 4-stroke, a complete stroke cycle is 720 degrees of crankshaft rotation (i.e. two revolutions); for a 2-stroke, it is 360 degrees (this is also factored in the REQ_FUEL value downloaded to MegaSquirt). (Technically, for MegaSquirt® EFI Controller, a cycle is defined as nCyl...
Sensors like this can also be used to measure speed (for example, to count how fast a wheel or car engine cam or crankshaft is rotating). You'll often find them in electronic speedometers and anemometers (wind-speed meters), where they can be used in a similar way to reed switches....
the position sensors for the camshaft and crankshaft, which identifies the engine's cycles; the mass airflow sensor and MAP (manifold absolute pressure) sensor, which monitor different ways air affects the engine; the oxygen sensor, which measures exhaust quality; idle control; the EGR valve sens...
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a first year 1975 Rabbit. The plan was to test it only to 24,000 miles, but since the car required extensive upgrading to 1976 specs (by VW) and then suffered a major failure (broken crankshaft) along with numerous more minor maladies, the test was...
There are no alignment pins for the front timing chain cover, so Mr Gasket makes a slick tool to align the front seal to the crankshaft. Slip the tool over the crank snout and then torque the front cover bolts in place. With all the bolts tight, remove the tool. The other tool is ...
How the mass air flow sensor is tested In modern cars, the only way to test the mass air flow sensor is with a scan tool. Mechanics measure the amount of air flow (mass air flow sensor readings) at different RPMs. They compare the readings to the specifications or to the readings of ...