Whistling from the engine bay at idle
- Symptoms
- Whistling at idle that stops when you press the accelerator quickly
- Likely cause
- Dirty or stuck idle air control valve (IACV) under the throttle body
- Fix
- Clean the IACV with carburettor cleaner; replace if still faulty
- Applies to
- SCP10 1SZ-FE
- Confidence
- low (owner thread, fix confirmed by owner)
Sources
Related problems on this car
- Engine will not stay running when cold
- Timing chain rattle at idle
- Cold start, then engine dies
- Lean code from an air leak (P0171)
Similar problems on other cars
- Idle drops or engine stalls when pressing the clutch · Suzuki Cultus (2nd gen, EFI)
- A/C load: idle vibration & poor pick-up with A/C on · Toyota Passo (1st gen)
- Check engine light at full throttle · Suzuki Cultus (2nd gen, EFI)
Where the parts are · Warning lights · Fault codes · Maintenance
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Guidance only – confirm with a mechanic before repairs. All common problems