hello all,

i have a quick question, can the PIP (stator) be tested and how do you test it? any information would be greatly appreciated.

thanks

faceman

 

Which stator are we talking about?

 

The CMP (hall effect PIP) sensor is a digital output device located within the distributor. A rotary vane cup, used to trigger the hall sensor, is mounted on the shaft of the distributor and is made of a ferrous metal. When the window of a cup is in the air gap between the hall device and the permanent magnet, a magnetic flux field is completed from the magnet through the hall device and back to the magnet. This condition results in a low (0 volts) output signal (Figure 1 below). As the distributor shaft turns, a tooth on the cup will move into the air gap. The magnetic field will be shunted by the tooth (Figure 2 below), preventing it from reaching the Hall device, and the output signal will change from a low to a high (B+).

On engines having sequential electronic fuel injection (SFI), one tooth on the vane cup is smaller than the rest to identify when cylinder No. 1 is at 10 degrees BTDC. The width of the PIP signal generated by this tooth is smaller than that of the other teeth and is called signature PIP (Figure 3 below). It is required by the PCM so that it can accurately control the sequential firing of the fuel injectors.





Also see:
http://i54.photobucket.com/albums/g91/subford/Electrical/Ignition/HallSwitch.gif

http://i54.photobucket.com/albums/g91/subford/Electrical/Ignition/dist.gif

http://i54.photobucket.com/albums/g91/subford/Electrical/Ignition/TFIDISMONT.gif

http://i54.photobucket.com/albums/g91/subford/Electrical/Ignition/TFIModule.gif

 

so is there a way to test the pip?

 

To test the PIP sensor you need the test cable and breakout box.

Unplug the EEC Computer, unhook the battery while doing this.
DVOM on 20 volt AC scale.
Crank engine and measure voltage between J15 (PIP) and J7 (BAT-).
Is voltage between 3.0 and 8.5 volts AC?
If YES the Sensor is OK.
If NO then the sensor is bad if the TFI Module is good.

Test Cable:
http://i54.photobucket.com/albums/g9...osticCable.gif

 

Bill you're right on, but I just wanted to add that even the batch fire truck distributors use a narrow tooth for cylinder 1 reference.

 

well i thank you all very much and i guess ill be going to get some new parts. hopefully i can get this old girl to start one day. untill next time.

thanks

faceman