cam sensor (cps)cid hall effect

[shoclown]

after resealing the front and top of the 89, we are putting it back togather (differenet students installing than the ones that tore it down. a question has come up mostly due to other frod engines.
Does it matter if the metal hall effect vane is positioned? it can only go one two ways(as it has two screws holding it on. can you put it on upside down? the windows look close to eachother but measure out slightly different?
after the timming belt goes on and all the sprokets are lined up to marks and the belt marks line up . what position does the metal van go on?
does it matter? the students werelooking up the instal info and came across a article that is discussing the correct line up procedure but the article is for a known sho v6. on the non sho it looks as it will make a huge difference but i am not sure on the sho? any help would be greatly appreciated

 

[SHOZ123]

Here's a description from the Ford manual. With only one trigger point it doesn't sound like orientation would make any difference.

The camshaft and crankshaft sensors used on the 3.0L SHO and 3.8L SC vehicles are digital hall devices (Figure 5). The 3.0L SHO camshaft sensor is located on the right end of the rear cylinder head close to cylinder 1. In the 3.8L SC, the camshaft sensor is in the location normally used for the distributor. The camshaft sensor is the same in both cases but the mounting adapter is different. A rotary vane cup (or wheel), made of ferrous metal (Figure 6), is used to trigger the hall effect switch located in each of the sensors. The camshaft cup has one tooth and is driven by the camshaft. The signal from the camshaft sensor has one positive-going edge once every two crank revolutions (one cam revolution). The crankshaft cup has three teeth and the crankshaft sensor generates three positive (PIP) edges every revolution of the crankshaft.

When the window of the vane cup is between the magnet and hall effect device, a magnetic flux field is completed from the magnet through the hall effect device and back to the magnet (Figure 7), the output signal will be low (zero volts). However, when the vane tooth moves into the gap between the hall effect device and the magnet, the flux lines are shunted through the vane and back to the magnet (Figure 8) and the output will change from a low to high (VBAT).

 

[projectSHO89]

Because the computer is probably looking for a signal transition from one state to the other (ie, high-to-low or low-to-high) in order to properly synchronize the injectors, I'd suspect it is mandatory that the vane be positioned on the correct position.

Failure to do so on the cam sensor would cause a signal to be 180 degrees out of phase with what the computer needs. Therefore; Yes, the vane does need to be correctly oriented.

Steve

 

[shoclown]

does anyone know the orentation?

 

[SHOZ123]

Plug up.

 

[AREA 91]

The "shutter wheel" that's on the end of the cam can only be positioned 1 way due to the mounting screws being offset. The cam semsor can only go on 1 way was well. The 12 o-clock position.

 

[shoclown]

then i have some sort of morphidite becouse mine will bolt up either way

 

[K-Dawg]

Are you talking about the sensor? If so, do you have the "adapter" that goes between the sensor and head?

The vane only goes on one way. Seems like the vane is on the top with the engine at TDC, but I don't remember for sure. It might be on the bottom.

 

[sdpatt]

I looked at the pictures from a previous service I performed to replace the camshaft seals on my car. From that I recall that with the crank damper white index line at the 0 degree mark on the lower timing belt cover (number one cylinder at TDC), the orientation of the vane on the CID sensor was such that you could see and access the two bolts that secure it to the camshaft. The vane was toward the firewall and the opening was toward the front of the car.