diff --git a/sanguo_portfolio/runner_live.py b/sanguo_portfolio/runner_live.py
index 1d227e9..7981861 100644
--- a/sanguo_portfolio/runner_live.py
+++ b/sanguo_portfolio/runner_live.py
@@ -42,6 +42,32 @@ CONNECT_RETRY_ATTEMPTS = 5
 CONNECT_RETRY_WAIT_SEC = 10.0
 
 
+PREFLIGHT_QUOTE_CODE = "510500.SH"  # QMT 后缀格式;聚宽 .XSHG 传入返回空(09-03 踩坑)
+
+
+def quote_preflight(_fetch: Any = None) -> str:
+    """启动期行情腿自检:进程内 get_full_tick 一笔,返回可读结论字符串。
+
+    2026-09-03 行情腿事故定位用:引擎进程内取价失败(momentum 6 笔卖单
+    fail-closed 忽略)而独立探针 .SH 格式全通——需要**进程内**直接证据区分
+    「引擎会话坏」vs「数据服务坏」。boot 时留痕一笔,轮换后即知新进程
+    行情腿通不通;只记日志不阻断启动(自检失败不挡交易,留证据即可)。
+    """
+    try:
+        if _fetch is None:
+            from xtquant import xtdata
+            ticks = xtdata.get_full_tick([PREFLIGHT_QUOTE_CODE])
+        else:
+            ticks = _fetch()
+        d = ticks.get(PREFLIGHT_QUOTE_CODE) if isinstance(ticks, dict) else None
+        if d:
+            price = d.get("lastPrice", d.get("last_price"))
+            return "OK price=%s" % price
+        return "EMPTY ticks=%s" % (str(ticks)[:60] if ticks else "{}")
+    except Exception as e:  # noqa: BLE001 - 自检不阻断引擎启动
+        return "EXC: %s" % e
+
+
 def with_connect_retry(broker: Any,
                         attempts: int = CONNECT_RETRY_ATTEMPTS,
                         wait_sec: float = CONNECT_RETRY_WAIT_SEC,
@@ -274,6 +300,8 @@ def run_live(provider_config: Dict[str, Any] | None = None) -> None:
     logger.info("QmtBroker 装配 account=%s data_path=%s(connect 失败退避重试 %d×%.0fs)",
                 cfg["account"], cfg["mini_path"],
                 CONNECT_RETRY_ATTEMPTS, CONNECT_RETRY_WAIT_SEC)
+    logger.info("[quote-preflight] 行情腿自检 %s: %s",
+                PREFLIGHT_QUOTE_CODE, quote_preflight())
 
     # 实例虚拟账本(共享 QMT 账户的切片视图,2026-08-19 互卖/对账/收益率三问题同根):
     # 先建+恢复再起 engine——适配层 _setup 经 get_active() 注入 facade 通道
diff --git a/tests/portfolio/test_runner_live_connect_retry.py b/tests/portfolio/test_runner_live_connect_retry.py
index 986042d..e81c94b 100644
--- a/tests/portfolio/test_runner_live_connect_retry.py
+++ b/tests/portfolio/test_runner_live_connect_retry.py
@@ -66,3 +66,31 @@ def test_live_config_carries_instance_strategy_name():
     from bullet_trade.core.live_engine import LiveConfig
     cfg = LiveConfig.load({"strategy_name": "live_17"})
     assert cfg.strategy_name == "live_17"
+
+
+# ---------------- quote_preflight:启动期行情腿自检(2026-09-03 事故定位) ----------------
+
+def test_quote_preflight_ok_with_price():
+    """行情腿通:返回 OK+价格(进程内直接证据,boot 时一笔留痕)。"""
+    from sanguo_portfolio.runner_live import quote_preflight
+    out = quote_preflight(_fetch=lambda: {"510500.SH": {"lastPrice": 7.88}})
+    assert out.startswith("OK")
+    assert "7.88" in out
+
+
+def test_quote_preflight_empty_is_reported_not_raised():
+    """取到空(格式错/会话坏/盘后无数据):返回 EMPTY 摘要,绝不抛。"""
+    from sanguo_portfolio.runner_live import quote_preflight
+    assert quote_preflight(_fetch=lambda: {}).startswith("EMPTY")
+    assert quote_preflight(_fetch=lambda: None).startswith("EMPTY")
+
+
+def test_quote_preflight_exception_is_swallowed():
+    """fetch 抛异常:返回 EXC 摘要——自检不阻断引擎启动。"""
+    from sanguo_portfolio.runner_live import quote_preflight
+
+    def _boom():
+        raise RuntimeError("xtdata down")
+    out = quote_preflight(_fetch=_boom)
+    assert out.startswith("EXC")
+    assert "xtdata down" in out