PS3 Engine takes off at full throttle when misses watchdog signal

Conventional lock in neutral should eliminate the full throttle from missed WD..Forum member Dave Zucal has the details..hopefully he chimes in.

willygee posted:

Conventional lock in neutral should eliminate the full throttle from missed WD..Forum member Dave Zucal has the details..hopefully he chimes in.

This is what I did a few years back.  It worked for me.  I found that I had more of an issue with the PS3 engines when using old school power.  I like my PW ZW but the 180 watt Lionel power houses seem to never have the issue for me.  Curiously, what REV TIU do you have?  From the drawing, it would appear a REV L.  I had the missed watchdog issue with both a REV I and a REV L TIU.

Tony

It is a Rev L TIU.  How do I set the conventional lock in neutral?

Here is the thread from a few years back:

https://ogrforum.com/...-dcs-watchdog-thread 

Thanks for the replies.  Your answers gave us another search (conventional locked in neutral) which brought up a thread about conventional locked in forward, which we think is what was happening.  

We finally got it to actually do a conventional reset using a MRC transformer on our test track.  We took the TIU completely out of the equation.  We set the volts at 10 v and finally ended up at about 8 v (just at the point the lights stayed on but the engine was not moving, or just barely moving).  We then pushed the horn button once and the bell button five times as stated in the manual for a conventional feature reset.  It took a few tries and we kept lowering the voltage until finally after pushing the horn button once and the bell 3 times we heard the two horn blasts, so not sure exactly how many bell pushes were needed.

The engine now comes up in neutral as it should!

Tony, thanks for adding that link.  That was not the thread I originally found, but very helpful.