NO CODES, ONE MECHANIC THAT LOOKED SAID HE GOT A HISTORY OF MISFIRES, COULD IT BE CAMSHAFT AND OR CRANKSHAFT SENSORS EVEN WITHOUT ENGINE LIGHT?
CHANGED IT
HOWS IT GOING OUT THERE? I'M NEW TO THE CLUB. I HAVE A 2001 IMPALA, 3.4L. IT SOMETIMES HESITATES ON TAKE OFF, AND WILL SHAKE LIKE ITS MISFIRING AT HIGH SPEED, FROM 60MPH AND HIGHER. MOSTLY AT A STEADY SPEED. INSTALLED NEW PLUGS AND WIRES,COILS,FUEL FILTER,FUEL PUMP, THROTTLE POSITION SENSOR, AND VEHICLE SPEED SENSOR. STILL HAVE SAME PROBLEM.HOPE SOMEONE CAN HELP, THANKS
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