no spark when cold for 8-10 seconds

  • roadtek
  • Massachusetts, United States
  • Posted 16 Nov 2016 05:07 AM
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?
Showing items 1 - 5 of 5 results.
  • roadtek
  • Massachusetts, United States
  • Posted 1 Dec 2016 06:08 AM
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.
  • stam
  • Ontario, Canada
  • Posted 1 Dec 2016 11:00 PM
Could it be related to oil pressure?
  • roadtek
  • Massachusetts, United States
  • Posted 1 Dec 2016 11:33 PM
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 6 Dec 2016 06:41 AM
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 24 Dec 2017 01:50 PM
did you get this fixed? also was any codes showing?

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