My CQT 20v continues to give me problems. This problem is intermittent but seems to be getting worse! When driving in city areas at approx 30-35mph 4th gear the engine RPM suddenly drops and if I press the accelerator several times the power comes back with a kick and will then repeat, RPM is below 2000. If I drop to a lower gear(over 2000rpm) the problem seems to clear. Any ideas anyone?