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1997 GMC Yukon Won"t start in cold.

Tiny
LINDA JONES
  • MEMBER
  • 1997 GMC YUKON
  • V8
  • 4WD
  • AUTOMATIC
  • 178,000 MILES
Cold weather is here and my Yukon won't start without gas being poured into the carb. I have an engine light that stays on continous. The auto shop I went to says my cataslytic converter is going bad, but it only has to do with emission control and will not effect my performance. A backyard mechanic said it was affecting the sensors regulating fuel mixture. He said I need to replace it and the two sensors as needed, and to have the crank sensor checked. He also said that I might need to have the brain of my vehicle checked by a pro to see if it needs to be changed to accept changing fuel mixture. Are either of these guys right or should I just go to GM?
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Sunday, December 7th, 2008 AT 8:09 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
1. CPS problem the vehicle w/n start at all-it started when you prime it-right

2. Clogged C/Converter will choke its breathing and engine will not start or lost of power

3. The O2 sensors will not prevent the engine from starting.

Check the fuel pressure to rule out the fuel pump and also the oil pressure sending unit this is where you should start.
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Sunday, December 7th, 2008 AT 9:25 AM

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