Just got the 50K maintenance done on the car, changed spark plugs and spark plug wires, and changed the valve cover gasket, had the fuel injectors inspected.
This started a few days after that. When pressing down on the clutch and hitting the gas pedal, the engine starts to shake and sound like a helicopter until the rpm hits about 2500. This is happening only when the car is on 1st and 2nd gear.
Could this be a symptom of a worn clutch, or issues with the spark plugs replace incorrectly?
Sounds like a miss fire. I would check coils and wires first. Spray the ignition system with a spray bottle and see if there are sparks jumping to ground around the coils and wires. Or if it starts to idle poor.