6.6 duramax diesel engine cranks good cold but periodically won't crank hot unless I use starting fluid. This usually happens after engine has been turned off about 30 minutes. Also if idles for several minutes accelerator is very slow to react sometimes have to push it several times before it works.

  • Which year/model is your Duramax in? – Pᴀᴜʟsᴛᴇʀ2 Jun 23 '16 at 15:51
  • 2002 Chey 2500hd 4 wheel drive silverado – Bird Jun 24 '16 at 22:01
  • Have you tried to prime the fuel system when this happens? I believe the primer pump is on the fuel filter housing. – Pᴀᴜʟsᴛᴇʀ2 Jun 25 '16 at 0:35
  • Yes with no success it's like it has shut off fuel to injectors, vapor lock or something – Bird Jun 27 '16 at 14:27
  • How long does it take for it to start again? What do you do to get it started? How long do you have to wait for it to start again? You stated "periodically" ... this means it's sporadic and doesn't happen every time? – Pᴀᴜʟsᴛᴇʀ2 Jun 27 '16 at 14:56

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