A car juddering under acceleration can involve ignition, fuelling, mounts, clutch or drivetrain faults. See the clues that help separate the possibilities.
Juddering under acceleration is a symptom rather than a diagnosis. The most useful distinction is whether the vibration follows engine speed, road speed, clutch operation or simply appears when the engine is placed under load.
Misfires from spark plugs, ignition coils, injectors or air/fuel problems often become more noticeable under load. An engine-management light or stored misfire code can provide useful supporting evidence.
If the judder is strongest while moving away from a standstill, clutch contamination, clutch wear, a dual-mass flywheel or engine/gearbox mounts may be relevant. If it changes mainly with road speed, driveshafts, CV joints, wheels and tyres deserve more attention.
Note the gear, engine speed, road speed, whether the engine is hot or cold and whether the problem occurs at light throttle or only during harder acceleration. These details help separate faults that otherwise feel very similar from the driver's seat.
Describe what your vehicle is doing and AutoAid can use the details, your saved vehicle and any OBD-II code to narrow the likely causes.
Start a diagnosisSee all symptom guides →Symptom pages are a starting point, not a confirmed diagnosis. If braking, steering, overheating, smoke or another safety-critical problem is present, stop somewhere safe and arrange professional inspection.