4.8 / 5.3 / 6.0 vortec
The crankshaft sensor is a 24X (58X on 2004 and later engines) pulse
sensor that controls ignition coil firing and injector pulse. The 24
tooth reluctor wheel is mounted on the back of the crankshaft. This
location is known as the "quiet" deflection zone that minimizes any
false signals to the pcm that can be misinterpreted as a fault. As with
the CMP, the crankshaft sensor is a magnetic sensor that has the field
interrupted by the passing the the teeth on the reluctor. This signal
is conditioned by the sensor circuitry so I can be properly used by the
pcm.
The pcm constantly times the pulse intervals it receives, in conjunction
with the CMP to resync the point of the #1 firing stroke. Any changes
to the timed intervals at each firing order stroke is read by the pcm as
a change in crankshaft velocity. Using the other sensors such a MAP,
and TPS, the pcm can determine the changes in crankshaft speed when the
engine is accelerating or decelerating, within normal operating
conditions, and when the changes are outside the normal parameters, the
pcm detects this as a misfire, and the appropriate DTC is set. A loss
of this signal will result in a no-start or no run condition.
The location of the CKP is on the right hand side above the starter.
http://chevythunder.com/LS1_crank_sensor_loc..jpg
http://chevythunder.com/LS1_crank_sensor.jpg
On the 4.3 vortec, it's located on the front bank2 of the engine by the crank shaft.
http://www.2carpros.com/forum/automo...CAS371KE_1.jpgThank you for using fixya
Read more at http://gmcowners.com/gmc-forum/showthread.php?t=16373&kcplink=1
We changed engine cores but when complete no fire at all we used same heads, intake, crank sensor, distributor and all.
my obd2 says no codes could i be missing a ground to the block and how does the crank sensor work?
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