I'm needing some info on the throttle body body itself because I think I'm starting to have some problems with mine but I'm wanting to ask everyone here. One of the biggest problems it the RPM's fluctuate from 500 to 900 when the car is at idle and the car hesitates to get up to speed. I took my car into my local Ford dealership for diagnostics into such problem but they said it was normal for them to fluctuate like that because the car has almost 100k on it and the hesitating to speed up Ford couldn't figure out. So is Ford right about the RPM fluctuating or not. Also the car has recently been tuned up within the last 7k miles. New plugs from Ford and a Fram air filter. Thanks.