PONTIAC ENGINE RUNS ROUGH

When I Drive My 1998 Pontiac Sunfire It Will Drive Smooth Until I Hit 50 To 55 Miles An Hour And Then It Will Chugg Until I Get Up To 60 Mph...

My 2003 Pontiac Grand Prix Has Been Running Funny Lately It Seems To Accelerate Slowly Also I Accidentally Hit A Large Pothole Recently I've...

1995 Pontiac Transport 6 Cyl Hello, My Mini Van Starts Well, Runs Well When Cold, But As Soon As It Worms Up A Little, It Seem...

Engine Performance Problem 1971 Pontiac Lemans V8 Two Wheel Drive Automatic? Miles 3 Days Ago My Engine Started Running Poorly I Cannot...

Engine Performance Problem 1997 Pontiac Transport 6 Cyl Two Wheel Drive Automatic When I Press The Brake, The Engine Start To Idle...

2000 Pontiac Grand Prix, 69000 Miles, 3.1 Engine. When I First Start Car I Get Excessive Valve Noise. It Goes Away After A Few Minutes...

I Was Driving About 20 Minutes And And Stopped For A Light. The Car Stalled. I Started It. Bklack Smoke Came Out Of Exhaust And Then It...

What Would Cause A 2003 Pontiac Sunfire To Cut Off When It Comes To A Stop Without Any Indicator Lights But It Starts Back And Appears To...

My Car Had A Misfire At #5. Engine Light Came On. Was Running Rough. After Checking All The Plug Wires Round Fine But Engine Light Still On

What Wil The Dealer Want To Do To My Car For 100k Mile Maintnenace Visit? Just Wondering How Much It Will Cost Me? I Have No Problems...