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check for vacuum leaks and check your oil level. the pvc valve might be bad as well. some vehicles will run badly after a quick loss of vacuum such as when you get off of the freeway. check the tps too Throttle position sensor check/adjustmentbig_aluminum_wing said:My car's a '97 SE, 147k. After I get off of the interstate for about 45 miles or so and slow down at the end of the exit ramp my car acts like its going to stall out! What the heck? It hasn't stalled out, but the idle drops waaaayyy down, like 300 rpm or so. This is not normal behavior for the car, and after a little more driving around in town it won't do this anymore. Any ideas? I'm fresh out.