SHUDDERS AND A WHITE SMOKE

1997 CHEVROLET SILVERADO
17,000 MILES
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BNILAND2
  • MEMBER
  • 2 POSTS
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
Apr 23, 2012 at 5:17 PM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 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
Apr 23, 2012 at 5:21 PM
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BNILAND2
  • MEMBER
  • 2 POSTS
So it's possibly a coolant sensor in the injector system?
Apr 23, 2012 at 5:30 PM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
possibly but a shop with a scan tool can monitor it for you to verify.

Roy
Apr 24, 2012 at 4:25 PM
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