trouble shooting question

First, there is no DCS upgrade from Proto 2 (PS2) to Proto 3 (PS3). PS2 and PS3 are two different types of engines, both of which should work equally well with DCS.

Rather, I expect that someone may have, in actuality, upgraded the DCS software that runs in the TIU and the DCS Remote.

Regardless, both types of engines should add to DCS and operate in exactly the same way. It sounds like the DCS is fine, since the PS3 engine added and operates as it should. From the scenario that you described regarding the PS2 engine, it sounds like it may be the problem, not the DCS.

Has the PS2 engine ever operated, and does it still operate, conventionally?

Lil Dave,

   I sure agree with Barry it sounds like you have an engine problem.

I also recommend you purchase Barry's book the DCS O Gauge Companion Vol 2 and the OGR Video guide to DCS.  Further I always recommend setting up a permanent programming track for adding engines one at a time. Further IMO BCR's are fantastic in P2 Engines and a must in all early P1 engines. 

PCRR/Dave

Are you saying that as soon as power is applied, the loco starts moving on its own?

I'd have to sing with the chorus, when I see that behavior, it's normally a shorted driver for the motor control.

If a motor lead is touching the can motor and  the engine sees the dcs signal  on start up but the scale miles per hour is still  at 0, It won't take off until the speed is scrolled up??? Right?

I would check and see if all the wires are attached to the tach reader board, the little board attached to the motor. If the loco doesnt' take off until the thumbwheel is turned, that would be my first suspect. 

Not true.  Depends.  When the PS-2 board starts up the Positive Voltage is available immediately.  If the return wire is touching chassis ground current will flow through the motor and into chassis ground bypassing the Motor FET.  Engine will start moving, and the load can prevent the processor/5VDC circuit from operating.  I have seen this many times on diesels.

If it takes a throttle response to go full throttle that is usually a tach issue or a motor FET issue.  G

G,

Now that I think about it, I agree with you that all it takes is track power to get an engine moving when the motor lead is shorting to the chassis. Thinging back, that was what was the scenario with the Northern.

I've revised my post above.

You guys are probably correct, I ain't going to try it. Yep! that's me.

thank you all and your all correct I do think its a engine problem.im going to bring it to the shop and have it serviced.i did get it to run but it is very touchy.