Mechanics

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.

1997 Chevrolet Silverado • 17,000 miles

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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Bniland2
April 24, 2012.




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

ASEMaster6371
Apr 24, 2012.
So it's possibly a coolant sensor in the injector system?
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Tiny
Bniland2
Apr 24, 2012.
Possibly but a shop with a scan tool can monitor it for you to verify.

Roy

ASEMaster6371
Apr 24, 2012.

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