I HAVE A 1997 P-3500 STEP VAN WITH A 6.5 DIESEL ENGINE/NOT TURBO.

  • Tiny
  • overworked
  • 1997 GMC
  • 14,300 miles

It starts and runs very well, then after a few minutes, white/gray looking smoke starts to go from light to heavy, but it still runs fine. What is causing this? I have been told that it could be EGR vaulve, but it is ok. Where do I look next.

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Saturday, September 10th, 2011 AT 1:26 AM

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  • Tiny
  • Jacobandnickolas
  • Expert
  • 68,409 posts

Make sure your vehicle isn't using coolant. Check fuel pressure.

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Saturday, September 10th, 2011 AT 1:30 AM

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