Question about 2001 Chevrolet Silverado 1500

1 Answer

Throttle sticks at 200 RPM

After prolonged driving on freeway for say 1 hour at a constant speed (RPM 2000) the throttle sticks at that speed and then accelerates to 3000 RPM. the truck is a manual 5 speed. (180Km) rRmoval of air horn and a shot of fuel injector cleaner to butterfly in air box seems to only fix problem temporarily. this problem only occurs at a sustained rpm as if it has a "not so sweet spot'. under normal acel and decel say in town problem does not occur.
any help is appreciated. this is bloody annoying
thanks
Allan

Posted by on

  • clark1000 Oct 19, 2008

    Steve, thanks for your comment, that is exactly what I deduce the to be he problem! (or is it in the throttle cable)?. I have done what you suggest many times before and as I run a K&N filter have had no visible accumulations of "dirt" or blackening. So my thoughts are perhaps the butterfly sticks at that RPM due to a flat spot or perhaps a faulty bearing (if there is one).
    what do you think of after a cleaning (again) I try a silicone lube in the butterfly bearing areas?
    Allan


  • clark1000 Oct 19, 2008

    oh yeah the problem also occurred way before I installed a K&N filter, so I don't think it is oil or dirt..and as always the throttle butterfly is not "dirty' when this occurs.
    again, thanks for your thoughts.


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Sounds like your throttle body may be dirty. Take off the tube to your throttle body. Right there you should be able to see your butterfly. Open the butterfly, is it all brown/black? Needs to be cleaned. Your butterfly is more then likely sticking. Get some carb cleaner and a used toothbrush. Open butterfly and spray all around in there. Let is soak up for a few minutes and then start cleaning it away. When you see it all silverish, it's clean. Give it a try.

Posted on Oct 19, 2008

  • Steven Brock Oct 19, 2008

    Honestly, if cleaning it fixes the problem temporarily, there has to be something with it. How long do you consider temporarily? A day or two? If so, cleaning it isn't the option like I thought before, if it fixes it for a week or more, do a complete cleaning like i stated above. Now, as for the throttle cable, get some wd40 and spry it inbetween the cable and the covering of the cable. You know what I mean. Spray some in there and work it back and forth. Repeat that several times and you'll have the cable system lubed properly. As for the butterfly bearings, I don't know if there is any or what it uses. I have never seen or even heard of a problem with it. Can't help you with that one. But I'm going to be frank, if you use a K&N air filter, that uses oil to help catch dirt, correct? That could be the cause of the throttle body getting dirty so fast. I got a 99 full size stock with 160,000 and I don't have a single problem with it, other then rust. Try what you want, I'm only recomending what I know.

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