[s-cars] Failing POS? How do I rewire it?

[Dave Forgie]

Chris:  As you know, there are two POSs.  Each one has three channels. 
For the one that serves 4 and 5, there is a spare channel.  While its
easiest if you have a bad no. 4 or 5 channel to move those pins to the
empty "6th" channel, you can also create a spare channel situation for a
cylinder 1, 2 or 3 problem. 

The first thing to do is to swap both pairs of ECU input and coil
output connectors to the other POS.  This means that cylinder 1 will now
be fine but 4 probably has a problem now because its plugged into the
bad channel (the channel that No.1 was plugged into).  If that is the
case, then you can move the No. 4 pins to the now spare channel (the one
that used to server No. 3 before you moved the connector pairs).  If I
got this wrong and moving the connector pairs gave No. 5 the problem,
you still have an empty channel on that POS to play with.

Note:  You only get to play this game once.  When another channel
fails, then you will need new a new POS (351 A or the V6 351).

HTH

Dave F.

Chris Chambers posted:

Car has been running fine, upon returning to 
Michigan lsat night (from Ohio) I parked the car
for ~ 15 minutes. Came back out and it's only
running on 4 of the 5 cylinders.

Mechanic used a temperature sensor to determine
that it's missing on cylinder #1, which I have also
verified by disconnecting the injecor.

Checked the spark plug, all is fine there, hasn't been
acting up under boost so I believe it is the POS.

I have read about using the unused channel on the POS.
Question, how do I do "rewire" to use the "unused" channel?
And can I do this for cylinder #1?



Thanks for the input
Chris