Idle drops or engine stalls when pressing the clutch
- Symptoms
- RPM falls and the engine may stall when you press the clutch, mostly with A/C or lights on
- Likely cause
- Dirty or faulty idle air control valve (IAC) and throttle body. On cars with a CNG kit, owners fixed it by replacing the automatic CNG valve with a manual one.
- Fix
- Clean the throttle body and IAC valve; a scanner can show if the IAC duty changes with load. Replace the IAC valve if cleaning does not help. On CNG cars, check the CNG kit valve.
- Applies to
- EFI
- Confidence
- medium
Sources
- pakwheels.com/forums/t/cultus-vxri-efi-rpm-drops-with-light-ac-after-p
- pakwheels.com/forums/t/cultus-efi-engine-off-issue-b-c-rpm-drop-solved
Related problems on this car
- Check engine light at full throttle
- Overheating
- Gearbox oil leak from a seal
- Camshaft and tappet wear (top-end noise)
Similar problems on other cars
- RPM drops when braking with the A/C on · Honda City (5th gen, GM2)
- Idle hunting / stalling when the clutch is pressed (IACV/throttle body) · Toyota Corolla (9th gen, E120)
- Whistling from the engine bay at idle · Toyota Vitz (1st gen)
Where the parts are · Warning lights · Fault codes · Maintenance
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Guidance only – confirm with a mechanic before repairs. All common problems