Why can't the Mazda6 accelerate properly?

[DeHarley]

Possible causes include clogged fuel lines or exhaust system, or excessive carbon buildup in the throttle body. Here's relevant information: 1. Body dimensions: The Mazda6 is a midsize sedan from Mazda, measuring 4670mm in length, 1780mm in width, and 1435mm in height, with a wheelbase of 2675mm. 2. Powertrain: The Mazda6 uses two engines - a 2.0L naturally aspirated engine producing 147 horsepower and 183Nm of torque (max power at 6500rpm, max torque at 4000rpm) featuring multi-point fuel injection and aluminum cylinder head/block; and a 2.3L naturally aspirated engine delivering 163 horsepower and 204Nm of torque (max power at 6500rpm, max torque at 4000rpm).