[V8] Dizzy Hall sensor, knock sensors

[Tony and Lillie]

Easy way to check the hall sender for proper function (though does not 
guarantee to show intermittent issues). With it plugged in, ignition turned 
on. should see 12V+ on one of the end wires (usually red), ground on the 
other end (usually brown). Should see 5V on the center wire, or ground. As 
you turn the engine over by hand, you will see it change from 5v to ground, 
and back. Pulsating square waveform DC, basically.

If it's doing this, I wonder about the timing of it? How did you do the TB, 
and has this been an issue since the TB was done?

On a side note, I once unplugged the hall sender on my V8Q. It's a stock '91 
3.6 Auto. Very little difference in the way it ran. Next to none, to be 
honest. If you really apid attention, you noticed a split second delay in 
throttle response compared with plugged in, that's about all. However, if 
it's shorting to + or ground, that may produce more drastic results.

Knock sensors, check Ebay. Paid about $30 each for two or three shipped. 
Cheap Chinese ones, but have had good results so far.

I have a spare dizzy as well, but would like to hang onto it just in case, 
you know. I'll check and see if I might still have two spares, but I'm 
doubtful.

HTH,
Tony

----- Original Message ----- 
Subject: [V8] Dizzy Hall sensor, knock sensors


> Some of you have been following my saga related to a timing belt change,
> and an odd stumbling at 2500RPMs.  After taking it for a little drive
> around the neighborhood to see if perhaps it just needed time to get the
> fuel maps figured out, I think i'm back to the Hall sensor.  I had rebuilt
> the wiring and the connector mount on the passenger side distributor for
> the Hall sensor, but I don't think the rebuild worked.
>
> After the shakedown I'm getting codes 2111, 2113, 2142, 2144, indicating
> RPM, Hall, Knock #1, Knock #2.  SJM recommends checking knock 
> wiring/sensor
> for the latter two, but 2113 points back to my hall sensor.