CMP
#2
RF Veteran
iTrader: (1)
CMP = Cam position sensor
Cam sensors were added to increase accuracy of sequential fuel injection.
So yes they are used when engine is running, but are not "required" for engine to run.
The Crankshaft position(CKP) sensor is the main timing sensor on distributorless engines, computer uses it to set spark and injector timing, engine will not start without its "signal" pulses.
But a crank sensor is not as accurate as a Cam sensor
Cam sensor fine tunes injectors and spark for best MPG and lowest emissions
Cam sensors were added to increase accuracy of sequential fuel injection.
So yes they are used when engine is running, but are not "required" for engine to run.
The Crankshaft position(CKP) sensor is the main timing sensor on distributorless engines, computer uses it to set spark and injector timing, engine will not start without its "signal" pulses.
But a crank sensor is not as accurate as a Cam sensor
Cam sensor fine tunes injectors and spark for best MPG and lowest emissions
#4
#5
RF Veteran
iTrader: (1)
Yes, it is replaceable without taking off timing belt cover
There are TWO bolts
Drawing here: http://www.explorerforum.com/photopo...or_95-97_b.gif
No retiming is needed for this cam sensor replacement, like on the 3.0l and 4.0l OHV engines
There are TWO bolts
Drawing here: http://www.explorerforum.com/photopo...or_95-97_b.gif
No retiming is needed for this cam sensor replacement, like on the 3.0l and 4.0l OHV engines
#7
RF Veteran
iTrader: (1)
Just a heads up
90% of sensors or engine electrics replaced by DIYers were working fine, people often replace parts like these on speculation
Sensors rarely fail.
You read alot about people replacing sensors...............becase 90% of them do and shouldn't have, lol.
Before buying sensors you should buy:
Volt/OHM meter, $20
Vacuum gauge, $20
Bluetooth OBD2 scanner, $30
Pretty much any sensor or electric part can be tested with meter
All gasoline engines are self power air pumps, no matter how many sensors or other parts they bolt on to the outside, they are still just air pumps
So a vacuum gauge can tell you ALOT about a running engine
OBD2 is the communication software required by LAW, to be used on ALL vehicles sold in North America since 1995.
So if you plan on owning any vehicles for the next few years, then an OBD2 scanner will be worth the cost
The Bluetooth units are cheaper because you need to use YOUR smartphone or a Tablet/laptop as the display to see the data.
Yes, these read codes but do a whole lot more, like LIVE engine data while driving, you can see what each sensor is reporting to the PCM(engine computer), and what the PCM is doing with that data.
90% of sensors or engine electrics replaced by DIYers were working fine, people often replace parts like these on speculation
Sensors rarely fail.
You read alot about people replacing sensors...............becase 90% of them do and shouldn't have, lol.
Before buying sensors you should buy:
Volt/OHM meter, $20
Vacuum gauge, $20
Bluetooth OBD2 scanner, $30
Pretty much any sensor or electric part can be tested with meter
All gasoline engines are self power air pumps, no matter how many sensors or other parts they bolt on to the outside, they are still just air pumps
So a vacuum gauge can tell you ALOT about a running engine
OBD2 is the communication software required by LAW, to be used on ALL vehicles sold in North America since 1995.
So if you plan on owning any vehicles for the next few years, then an OBD2 scanner will be worth the cost
The Bluetooth units are cheaper because you need to use YOUR smartphone or a Tablet/laptop as the display to see the data.
Yes, these read codes but do a whole lot more, like LIVE engine data while driving, you can see what each sensor is reporting to the PCM(engine computer), and what the PCM is doing with that data.
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