2002 pontiac grand am 3.4l v6 surges at 45-55 mph, not every trip. Checked for dtcs only dtcs are o2 sensor related. What would be the most probable cause of this surging at this speed range?
2002 pontiac grand am 3.4l v6 surges at 45-55 mph, not every trip. Checked for dtcs only dtcs are o2 sensor related. What would be the most probable cause of this surging at this speed range?
If the car has egr, I'd be looking into that. Could be leaning out at that speed.
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