Great help just what I need
Thanks

The diagnostic plug is located behind the vaporizer near the FTV (dither ) valve. Rectangular in shape with two wires.
You will require the Doosan/ Woodward software, connecting cables and interface as well as USB security fob.
If you have all that, upload "RBAK" update to SECM.

I have software and cabling for several brands but none of it appears to plug into any connection I can find on this machine. I'm not sure what the plug looks like on a Doosan.

thanks for the input

You will need to get he local Doosan dealer to update. As far as i know only dealers have the software and cabling.

I don't know what the tooling even looks like

the symptoms described are similar to complains resolve by a SECM up date. If you have the tooling update first.

G25E-3
KP00543
There are no wires or vacuum hoses attached to distributor on this machine. The engine is a Doosan G424E

That may have something to do with the wires in the distributor and the vacuum advance causing them to move. Maybe try disconnecting the vacuum hose on the distributor and see if it still does it.

send l serial number please

checked wiring-ok
checked coil and ignition module and pickup coil-ok
these were checked before I came on line
if I start the unit and leave it at idle I can drive around and use the hydraulics-it works fine, but if I accelerate at a normal rate the unit dies because the spark stops. will not start right away but will start after about 30 seconds. I have a spark tester in line with the distributor wire and can see the spark stop before the unit dies.

Assuming an ignition fault, check for broken wiring to and from the ignition coil and distributor. if all that checks out, test ignition coil if coil tests ok, (coil may be breaking down under load so a good test can be misleading). Test ignition module and pick up coil.
Doosan's have many wiring issues especially the -3 units. So check the wiring harness crossing over the transmission , wires often break under the clamps.