Stalling at idle with A/C + brake, hard start
- Symptoms
- Dies at idle under load
- Likely cause
- Suggested: weak fuel pump/clogged pump sock, catalyst, low compression
- Fix
- Check fuel pressure; replace in-tank filter/pump
- Applies to
- KGC10/KGC15/QNC10; Boon M300S/M301S/M310S (same platform)
- Related fault codes
- P0171/P0172 possible
- Related part numbers
- 23210-B1010, 23908-97205
- Confidence
- unverified (suggestions only)
Sources
Related problems on this car
- A/C load: idle vibration & poor pick-up with A/C on
- Blocked catalytic converter
- No power to fuel pump (KGC10 1KR)
- 1KR oil consumption
Similar problems on other cars
- Will not start: weak battery · Toyota Vitz (1st gen)
- Cold start, then engine dies · Toyota Vitz (1st gen)
- Idle hunting / stalling when the clutch is pressed (IACV/throttle body) · Toyota Corolla (9th gen, E120)
Where the parts are · Warning lights · Fault codes · Maintenance
Stuck with a car problem? Ask owners and mechanics for free in the UstadFix WhatsApp group.
Guidance only – confirm with a mechanic before repairs. All common problems