New guy with a 99 sub 1500 has a ? hesitation problem.

Discussion in 'Chevy Suburban Forum (GMC Yukon XL)' started by Pat10, Mar 29, 2012.

  1. Pat10

    Pat10 Member

    No this didn't start right after the gasket was replaced, that was late fall and this problem came about a month or so ago.
    but I will try what you said while I'm at it good tip.
  2. janikphoto

    janikphoto Rockstar 3 Years 100 Posts

    The tank additives will only help a bit. I would notice a little improvement on my truck when I did tank additives. The big difference came when I changed my fuel filter and used a can of carb cleaner and a toothbrush down the throttle body. Not the best way to clean it, but it was quick.
  3. Pat10

    Pat10 Member

    I changed the fuel filter and spark plugs. Now its got some get up! Guess it was just time for a tune....
  4. janikphoto

    janikphoto Rockstar 3 Years 100 Posts

    Don't stop there. Depending on mileage and previous maintenance, you could probably use a new dist cap & rotor, rear diff fluid change, trans fluid & filter change... and, as mentioned by several people above, a good cleaning of the TB and injectors. My 180k mile burb went from feeling like a 4 cylinder to a supercharged v-12 after all the maintenance!
  5. royiii01

    royiii01 New Member

    Try cleaning your MAF sensor, I had the same problem with my 99 suburban and once cleaned it went away.
  6. Quikfire

    Quikfire Member

    I second the cap and rotor. I had issues when I first bought my 99 burb and when I pulled the cap it was a mess in there. Made a huge difference!
    Good luck and happy whomping down the road.
  7. janikphoto

    janikphoto Rockstar 3 Years 100 Posts

    Really, any/every tune-up piece should be done on a 12 year old car with over 100k miles. My cap and rotor looked horrible, my plugs looked terrible, the plug wires weren't great, my fuel filter needed replacing, my injectors needed some cleaning, etc... The truck runs much better, but it needed several weekends in the driveway with me turning a few wrenches.

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