1990 burb, sputters off idle

Discussion in 'Chevy Suburban Forum (GMC Yukon XL)' started by myolbug, Oct 5, 2008.

  1. myolbug

    myolbug New Member

    Hello,
    have a sputter/stumble off idle. I am guessing that it is something with the idle circuit(?). I don't know much about the TBI I have on this. It is a 1/2 ton 1500 with auto and 5.7. All stock.

    A mechanic suggested a couple of things, tho it's been a while since I talked with him over the phone.

    Thanks
  2. LiquidSacrifice

    LiquidSacrifice New Member

    Bad gas if your running the cheap stuff stop now Bite the bullet and buy mid grade to the top dollar stuff 2 or three tanks should stop the problem if that doesn't help run injector/fuel system cleaner(with the better gas) through if your problem continues have the idle circuit looked at my truck did the same thing for a month befor i figured it out I was lucky it was cheap gas syndrome. It might be that simple hope this helps.
    Last edited: Oct 6, 2008

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