SHUDDERS AND A WHITE SMOKE

  • Tiny
  • bniland2
  • 1997 Chevrolet Silverado
  • 17,000 miles

SOMETIMES WHEN I START MY TRUCK IT "SHUDDERS" AND A WHITE SMOKE WITH A SULFUR LIKE SMELL COMES FROM UNDER THE HOOD. IT WILL THEN START LIKE NORMAL.

It has done this about 4 times. After the fourth time it would not start. I took it to a shop and they replaced the ignition module and it started again, but it did the smoke thing again. I'm stumped please help. Thank you

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Tuesday, April 24th, 2012 AT 12:17 AM

3 Replies

  • Tiny
  • ASEMaster6371
  • Expert
  • 25,556 posts

Sulfur is usually the cat converter overheating from too much unburnt fuel. You need to have the injector system checked for running rich like a coolant sensor failing.

Roy

Roy

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Tuesday, April 24th, 2012 AT 12:21 AM
  • Tiny
  • bniland2
  • Member

So it's possibly a coolant sensor in the injector system?

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Tuesday, April 24th, 2012 AT 12:30 AM
  • Tiny
  • ASEMaster6371
  • Expert
  • 25,556 posts

Possibly but a shop with a scan tool can monitor it for you to verify.

Roy

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Tuesday, April 24th, 2012 AT 11:25 PM

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