Reader Question I have a 92 Buick Century I just bought on 12/30/06.
When driving at cruise speed my car sputters after a half hour of driving, but does not when accelerating, decelerating, or at idle. I did not hear any strange noises such as popping from the engine or exhaust.
This symptom does make the car hesitate consistently at any consistent speed. I noticed that they did change the spark plug wires.
Can you please help me?
From your email, spark plug wires would have been my first guess. I would get the computer codes read and see if any information is being stored in your computer and go from there. I have seen a weak fuel pump cause symptoms of a misfire at cruising speeds, when you mash on the gas the pump works fine.
I have also seen the transmission torque converter cause similar problems. Try driving in DRIVE not overdrive, or LIGHTLY tapping the brake pedal (which releases the lock up torque converter) next time the problem happens. If the sputtering stops, you probably have an internal transmission problem.