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Idles Rough At Start-Up

Discussion in 'Chevy Suburban Forum (GMC Yukon XL)' started by mrcaddy, Jan 11, 2010.

  1. mrcaddy

    mrcaddy Rockstar

    What would cause my 1995 Chevy C1500 Suburban (350) to idle rough at start-up? After it is driven a couple miles it goes away. It doesn't seem to effect the driving of it too much at all. It has been bitter cold here-- single digits and colder. Thanks,Scott
  2. Crawdaddy

    Crawdaddy Epic Member Staff Member 5+ Years 1000 Posts Platinum Contributor

    The cold is doing it most probably. The "choke" circuit (it's really a computer program in a 95) is most probably having trouble coping with the extreme cold and is dumping tons of fuel into the motor, which can't be burnt quick enough. Once it warms up a little it should run better.

    My Bronco has a similar issue, but it's an 82 and has a carb, with a real choke circuit. Truck ran like junk yesterday because of the cold.

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