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SHUDDERS AND A WHITE SMOKE

Tiny
BNILAND2
  • MEMBER
  • 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
  • MECHANIC
  • 52,797 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
  • 2 POSTS
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
  • MECHANIC
  • 52,797 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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