Doosan (& Daewoo) G25P-3:
no spark when cold for 8-10 seconds

I have a Deawoo/Doosan GC25P-3 with a 3.0 GM that has a long crank time when cold. There is no spark during the first 8 - 10 seconds. After initial start, it starts right up every time, till it sits for 8+ hours. any thoughts? Software upgrade?
  • Posted 16 Nov 2016 05:07
  • Discussion started by roadtek
  • Massachusetts, United States
Showing items 1 - 5 of 5 results.
did you get this fixed? also was any codes showing?
  • Posted 24 Dec 2017 13:50
  • Reply by forktime
  • Alberta, Canada
The P series never used an oil pressure lock out. Had one once that had a bad wire harness between the coil and distributor that caused a long crank time. I have also seen a couple now where shade tree mechanics have removed the Woodward fuel system and install an Impco system. These can be hard to start and they stall easily as the PCM no longer has any control over mixture.
  • Posted 6 Dec 2016 06:41
  • Reply by dale_mc
  • Alberta, Canada
Great idea, i thought the same and asked the shop tech doing the work to watch the oil light during cranking ( since its only a tier 2 truck it has an ops, not a sensor), he says the light goes out in 2-3 seconds but still no spark Running out of ideas. Problem with this truck is its an outside truck and here in the northeast were coming into freeze season. It will surely get worse.
  • Posted 1 Dec 2016 23:33
  • Reply by roadtek
  • Massachusetts, United States
Could it be related to oil pressure?
  • Posted 1 Dec 2016 23:00
  • Reply by stam
  • Ontario, Canada
One additional note: if a battery charger is connected during a cold start, spark occurs right away. Charging and starting systems test ok. Seems when battery voltage drops below 10.5 during cranking , no spark happens.
  • Posted 1 Dec 2016 06:08
  • Reply by roadtek
  • Massachusetts, United States

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