Nissan Sentra Engine Hesitate

I Need Some Help Diagnosing A Problem With My Car Listed Above.  My Current Problem; The Speedometer Quits Working When Driving At Speeds...

The Gas Pedal Acuator And The Throttle Body Have Been Replaced.

I Wanting To Know If I May Have A Problem With My Indignition Switch? When I Had My Car Serviced They Did A Test Diganostic Test And...

My Car Drives Fine, Starts Fine, But In Town Traffic Makes It Hesitates From A Stop, Like I Have To Pump The Pedal For It To Kick In To Go...

I Ran The Codes And Had A P0128, 0340, And 0447, All Which Also Gave The Duplicate Pending Code. I Changed The Plugs, And Checked The Coils...

My Car Just Started Chugging Really Bad Like It's Not Getting Correct Gas. Now The Check Engine Is Flashing. It Is "gutless" When It Starts...

My Sentra Hesitates Sometimes Before Starting And Sometimes Doesn't Start On The First Try. A/c On Or Off Doesn't Seem To Make A Difference...

When I Drive My Car With The Ac On, Regardless How Fast I'm Driving The Car Just Stops (hesitate, Almost Like I'm Downshifting It) Randomly...

Is I Press On The Accelerator The Car Begins To Tug As I'm Driving 40 To 60 Miles Per Hour Tugging May Increase When I Take My Foot Off...

Nissan Sentra Gxe 2002 Intermiting Sputter Or Engine Hesitation At Any Rpm No Pattern But Does It Frequently Other Wise Runs To Perffection...