1987 Jeep Cherokee gas emissions ….?

GST (sensor position) was replaced a year ago. For the past few months, the motor rev at high speed for about one second every time you start the vehicle. Quickly return to idle. This was annoying, but I learned to live with him. Now The problem: So far, while three times at a coastal station (such as a ramp between the states, etc), the engine jumped the gas, apparently about half total second and then returns to the correct idle speed. It has been two after last week, and I have fear of urine out of me. Fortunately, it was very short, but obviously something which must be corrected. What could be causing this? Could be related to the GST? Thanks! NOTE: My foot is not on the accelerator in this case. In response questions below, has 250,000. I never replaced the fuel filter, and I have owned for more than two years. I think I could have replaced the O2 sensor a few years before.

It could also be that the throttle cable sticks to hang. I had this problem before and that kept the throttle cable … check and replace, if that is the problem. it was for me … In general, if the TPS is faulty, you will get a code and check engine light should be lit.

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