One problem related to vehicle shudder has been reported for the 2007 Suzuki Forenza. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2007 Suzuki Forenza based on all problems reported for the 2007 Forenza.
2007 Suzuki Forenza accelerates extremely slowly when hot. Car shudders and will not gain rpms. Often will not accelerate out of stop lights. Engine light flashes during such episodes. Engine light stays on at all times. Will lose speed randomly while in traffic. After time, it will suddenly regain power, resulting in an abrupt lunge if accelerator is depressed. Vehicle code said problem was with the catalytic converter. Replaced cat, but it made no impact on the vehicle's performance. Was advised that the problem could be the shift range sensor. Have not yet repaired as I spent all of my repair money on the cat replacement.