Waveform-like surging under acceleration at any speed - SOLVED
Hey folks!
Well, it's day 2 of ownership and she's acting up. :frown:
As the subject described, under any level of acceleration the engine surges up and then returns to normal, then up, and returns to normal (the duration is 1-1.5 seconds). In other words, it's as if I'm playing with the throttle by lightly gunning it to the beat of music - this is why I used waveform-like as the description. I don't detect the supercharger clutch engaging/disengaging as the feeling of torque is always present, if that makes communicates.
Now, she idles smoothly and there are no sputters or surges once I enable cruise control (maintaining set speed). If I use cruise control to accelerate, there doesn't appear to be any surging at all. And, no warning indicators are present on the instrument cluster.
In bullet points:
Does this point to a faulty accelerator pedal assembly (drive-by-wire)?
Hey folks!
Well, it's day 2 of ownership and she's acting up. :frown:
As the subject described, under any level of acceleration the engine surges up and then returns to normal, then up, and returns to normal (the duration is 1-1.5 seconds). In other words, it's as if I'm playing with the throttle by lightly gunning it to the beat of music - this is why I used waveform-like as the description. I don't detect the supercharger clutch engaging/disengaging as the feeling of torque is always present, if that makes communicates.
Now, she idles smoothly and there are no sputters or surges once I enable cruise control (maintaining set speed). If I use cruise control to accelerate, there doesn't appear to be any surging at all. And, no warning indicators are present on the instrument cluster.
In bullet points:
- Silky smooth idle
- Surges up and down under any level of acceleration
- Can accelerate with cruise control with no surging
- No warning lights are present - waiting for OBDII sensor (arriving this weekend) for possible codes
- Car failed emissions test... apparently.
Does this point to a faulty accelerator pedal assembly (drive-by-wire)?