The car runs smooth when idling, runs smooth when accelerating, but as the car gets close to the desired speed, it starts dropping rpms, then surging back up again. It's really hard to drive because the car is continously jerking.
With the cruise set at about 73mph, it was running at about 2900rpms then it was hesitate the rpms would drop to about 2500rpms, it would surge back up to about 3100 rpms and then level out to about 2900 rpms. The intervals between it doing this would depend on the road (going up/down hills or flat surface)I would guess at least every 45 - 90 seconds. (Note: It does NOT matter what the speed I'm driving at, it continously does this. Also, the car will not shift gears until it reaches about 4000rpms regardless of the speed of the vehicle)
I recently replaced the throttle position sensor (28 August 07) and the throttle body (22 September 07. After I replaced the throttle position sensor, it stopped surging for 1 day, after I replaced the throttle body, the car ran great for about three weeks, then it started surging again.
Could anyone offer any assistance or advise to resolve this problem? I would really appreicate it.
Tks, Mark
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