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Suburban K1500 4x4 jerking

My 1996 Suburban has 155,000 miles on it. I have owned it for 2 years now and just did the full tune up about a year ago. I noticed a slight and persistent jerk to it on the interstate, but it was so slight i thought maybe it was the wind. Within the last week it has been getting worse and worse and now its not just on the interstate. The wierd thing is it only happens when i am trying to maintain a steady speed, and if i feel it happening i can step on it and the engine responds quickly and takes off i just cleaned the throttle body out and put a can of sea foam in my gas but no impovement. It idles great at stops, has no problem starting from a stop and fires up right away when starting. I had a friend check the TPS sensor and he said there were no changes in the voltages when opening and closing the throttle...any suggestions?

Comments

  • I ALSO HAVE A 1999 1500 4X4 SUBURBAN AND IT DOES THE SAME THING. ITS RUNS GREAT WHEN YOU AND PUTTING THE GAS TO IT BUT WHEN YOU ARE TRYING TO STAY AT A STEADY SPEED IT STARTS TO JERK/BUCK FOR A WHILE THEN GOES AWAY BUT COMES BACK AGAIN........HELP
  • suburbsuburb Posts: 2
    Was there ever a response? I am having the same trouble with a 2000 Suburban
  • I found out the problem for me was that the transmission fluid was low and the fluid happened to be leaking into the transfer case, we ended up pulling out the transfer case and putting in a new seal, tranny fluid level has been fine and I have not had the problem since, so id start by checking your fluid
  • suburbsuburb Posts: 2
    Thanks for the response, I will give it a look
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