Rockledge
Pluggin' away
The cam (CID) sensor actually does a bit more than that in the Ford DIS system, most notably it helps synchronize the firing of the coils for the ignition module. What that means (among other things) is that you can still start the car without a good CID signal going to the PCM, since the DIS system is still able to "guess" which coil to fire, and inasmuch as one coil fires two plugs at the same time (due to the DIS "waste spark" design), there is in essence a 1 in 3 chance of the right cylinder being fired at the right time upon starting.richsho said:Cam sensor only used for start ups at least thats what i've read in about 3 of my sho magazines, out of 40 that i have ! Dear Vito! that what he says ,Sounds like crank sensor.
Also, as I understand it from others here on the board, the SHO's cam sensor signal (along with the crank sensor signal) is used by the DIS module to help develop and maintain the tach signal. In other words, a bad cam signal can adversely affect the tach signal.
So based on the above, I don't think the cam sensor can be ruled out in this case, at least given the information provided to this point.
(FWIW, the cam sensor is also used by the PCM for fuel synchronization, that is, it helps determine which injector should be firing, and when).
