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At a glance
Symptom triage summary
The engine stalls specifically when idling — at a stop sign or in traffic — but runs fine at speed, which points toward an idle-control or fuel-delivery issue rather than a broader engine fault.
UrgencyUrgency not yet verifiedSeverityModerateEvidenceSource notes available
What it may indicate
The engine stalls specifically when idling — at a stop sign or in traffic — but runs fine at speed, which points toward an idle-control or fuel-delivery issue rather than a broader engine fault.
Possible system
Engine
Urgency
Urgency not yet verified
Can I drive?
Drive with caution
Evidence/confidence
Source notes available
See source & evidence notes below
Short answer
The engine stalls specifically when idling — at a stop sign or in traffic — but runs fine at speed, which points toward an idle-control or fuel-delivery issue rather than a broader engine fault.
SeverityModerateDrive?Drive with caution
Can I still drive with this?
Drive with caution
Limit trips; avoid heavy loads and long highway runs.
SeverityModerate
Moderate
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Troubleshooting at a glance
UrgencyModerate
Check firstNote whether it restarts easily afterward — an easy restart points more toward idle control than a fuel-delivery failure
Can you drive?Drive with caution
Stop driving ifStalling in traffic is a safety concern for surrounding vehicles — have…
It cuts out when idling
The engine stalls specifically when idling — at a stop sign or in traffic — but runs fine at speed, which points toward an idle-control or fuel-delivery issue rather than a broader engine fault.
Possible causes
A dirty or failing idle air control valve or throttle body
A vacuum leak most noticeable at low engine speed
A weak fuel pump unable to maintain pressure at idle
A symptom on its own does not confirm which of these is responsible — it narrows the search, not the diagnosis.
Possible causes
A dirty or failing idle air control valve or throttle body
A vacuum leak most noticeable at low engine speed
A weak fuel pump unable to maintain pressure at idle
What to check first
Note whether it restarts easily afterward — an easy restart points more toward idle control than a fuel-delivery failure
Have the vehicle scanned for stored codes
Check for a rough or irregular idle just before it stalls
When to stop driving / seek help
Stalling in traffic is a safety concern for surrounding vehicles — have it diagnosed promptly rather than continuing to drive on unpredictable idle.