diff --git a/pjs/config.json b/pjs/config.json
index 541d6be..f30964f 100644
--- a/pjs/config.json
+++ b/pjs/config.json
@@ -132,6 +132,7 @@
       "http/access-log.js",
       "http/auth.js",
       "http/route.js",
+      "http/fault-injection.js",
       "filter/request-redirect.js",
       "filter/header-modifier.js",
       "filter/url-rewrite.js",
@@ -156,6 +157,7 @@
       "http/access-log.js",
       "http/auth.js",
       "http/route.js",
+      "http/fault-injection.js",
       "filter/request-redirect.js",
       "filter/header-modifier.js",
       "filter/url-rewrite.js",
diff --git a/pjs/http/fault-injection.js b/pjs/http/fault-injection.js
new file mode 100644
index 0000000..c54f54d
--- /dev/null
+++ b/pjs/http/fault-injection.js
@@ -0,0 +1,108 @@
+((
+  { config, isDebugEnabled } = pipy.solve('config.js'),
+
+  delayFaultCache = new algo.Cache(
+    route => (
+      (
+        range,
+        min = 0,
+        max = 0,
+        unit = 0.001, // default ms
+        delay = route?.config?.Fault?.Delay || __domain?.Fault?.Delay || config?.Configs?.Fault?.Delay,
+        percent = delay?.Percent,
+        fixed = delay?.Fixed,
+      ) => (
+        percent > 0 && (
+          delay.Unit?.toLowerCase?.() === 's' ? (
+            unit = 1
+          ) : delay.Unit?.toLowerCase?.() === 'm' && (
+            unit = 60
+          ),
+          delay.Range ? (
+            range = delay.Range.split('-'),
+            min = range[0],
+            max = range[1],
+            min >= 0 && max >= min && (
+              () => (
+                Math.floor(Math.random() * 100) <= percent ? (
+                  (Math.floor(Math.random() * (max - min + 1)) + min) * unit
+                ) : 0
+              )
+            )
+          ) : fixed > 0 && (
+            fixed *= unit,
+            () => (
+              Math.floor(Math.random() * 100) <= percent ? (
+                fixed
+              ) : 0
+            )
+          )
+        ) || null
+      )
+    )()
+  ),
+
+  abortFaultCache = new algo.Cache(
+    route => (
+      (
+        abort = route?.config?.Fault?.Abort || __domain?.Fault?.Abort || config?.Configs?.Fault?.Abort,
+        percent = abort?.Percent,
+        status = abort?.Status,
+        message,
+      ) => (
+        percent > 0 && status > 0 && (
+          __domain.RouteType === 'GRPC' ? (
+            message = new Message({ status: 200, headers: { 'content-type': 'application/grpc', 'grpc-encoding': 'identity' } }, null, { headers: { 'grpc-status': status, 'grpc-message': abort?.Message || '' } })
+          ) : (
+            message = new Message({ status }, abort?.Message || '')
+          ),
+          () => (
+            Math.floor(Math.random() * 100) <= percent ? (
+              message
+            ) : null
+          )
+        ) || null
+      )
+    )()
+  ),
+
+) => pipy({
+  _timeout: 0,
+  _message: null,
+})
+
+.import({
+  __domain: 'route',
+  __route: 'route',
+})
+
+.pipeline()
+.branch(
+  () => (_timeout = delayFaultCache.get(__route)?.()) > 0, (
+    $=>$.handleMessageStart(
+      () => new Timeout(_timeout).wait()
+    )
+  ), (
+    $=>$
+  )
+)
+.branch(
+  () => _message = abortFaultCache.get(__route)?.(), (
+    $=>$.replaceMessage(
+      () => _message
+    )
+  ), (
+    $=>$.chain()
+  )
+)
+.branch(
+  isDebugEnabled, (
+    $=>$.handleMessageStart(
+      () => (_timeout || _message) && (
+        console.log('[fault-injection] delay, message:', _timeout, _message)
+      )
+    )
+  )
+)
+
+)()
\ No newline at end of file
diff --git a/pjs/samples/fault-injection/config.json b/pjs/samples/fault-injection/config.json
new file mode 100644
index 0000000..880ce17
--- /dev/null
+++ b/pjs/samples/fault-injection/config.json
@@ -0,0 +1,249 @@
+{
+  "Configs": {
+    "EnableDebug": true,
+    "ErrorPage": [
+      {
+        "Error": [
+          404
+        ],
+        "Page": "404.html",
+        "Directory": "pages/"
+      },
+      {
+        "Error": [
+          502
+        ],
+        "Page": "502.html",
+        "Directory": "pages/"
+      }
+    ],
+    "Gzip": {
+      "GzipMinLength": 1024,
+      "GzipTypes": [
+        "text/css",
+        "text/xml",
+        "text/html",
+        "text/plain",
+        "application/xhtml+xml",
+        "application/javascript"
+      ]
+    }
+  },
+  "Listeners": [
+    {
+      "Protocol": "HTTP",
+      "Port": 8080
+    },
+    {
+      "Protocol": "HTTP",
+      "Port": 8081
+    },
+    {
+      "Protocol": "HTTP",
+      "Port": 8082
+    },
+    {
+      "Protocol": "HTTP",
+      "Port": 50052
+    }
+  ],
+  "RouteRules": {
+    "8080": {
+      "*": {
+        "RouteType": "HTTP",
+        "AccessLog": "/var/log/fgw-access.log",
+        "Fault": {
+          "Delay": {
+            "Percent": 50,
+            "Fixed": 300,
+            "Unit": "ms"
+          },
+          "Abort": {
+            "Percent": 50,
+            "Status": 503,
+            "Message": "fault-injection-message"
+          }
+        },
+        "Matches": [
+          {
+            "Path": {
+              "Type": "Prefix",
+              "Path": "/"
+            },
+            "BackendService": {
+              "backendService1": {
+                "Weight": 100
+              }
+            }
+          }
+        ]
+      }
+    },
+    "8081": {
+      "*": {
+        "Matches": [
+          {
+            "ServerRoot": "/var/www/html",
+            "Index": [
+              "index.html",
+              "index.htm"
+            ],
+            "TryFiles": [
+              "$uri",
+              "$uri/default/",
+              "=404"
+            ]
+          }
+        ]
+      }
+    },
+    "8082": {
+      "*": {
+        "Matches": [
+          {
+            "ServerRoot": "www2",
+            "Index": [
+              "default.html",
+              "index.html"
+            ]
+          }
+        ]
+      }
+    },
+    "50052": {
+      "*": {
+        "RouteType": "GRPC",
+        "Matches": [
+          {
+            "Fault": {
+              "Delay": {
+                "Percent": 50,
+                "Fixed": 300
+              },
+              "Abort": {
+                "Percent": 50,
+                "Status": 14,
+                "Message": "fault-injection-message"
+              }
+            },
+            "Method": {
+              "Type": "Exact",
+              "Service": "helloworld.Greeter",
+              "Method": "SayHello"
+            },
+            "BackendService": {
+              "backendService2": {
+                "Weight": 100
+              }
+            }
+          }
+        ]
+      }
+    }
+  },
+  "Services": {
+    "backendService1": {
+      "StickyCookieName": "_srv_id",
+      "StickyCookieExpires": 3600,
+      "HealthCheck0": {
+        "Interval": 10,
+        "MaxFails": 3,
+        "FailTimeout": 30,
+        "Uri": "/",
+        "Matches": [
+          {
+            "Type": "status",
+            "Value": [
+              200
+            ]
+          }
+        ]
+      },
+      "Endpoints": {
+        "127.0.0.1:8081": {
+          "Weight": 50
+        },
+        "127.0.0.1:8082": {
+          "Weight": 50
+        }
+      }
+    },
+    "backendService2": {
+      "Endpoints": {
+        "127.0.0.1:50051": {
+          "Weight": 50
+        }
+      }
+    }
+  },
+  "Chains": {
+    "HTTPRoute": [
+      "common/access-control.js",
+      "common/ratelimit.js",
+      "common/consumer.js",
+      "http/codec.js",
+      "http/access-log.js",
+      "http/auth.js",
+      "http/route.js",
+      "http/fault-injection.js",
+      "filter/request-redirect.js",
+      "filter/header-modifier.js",
+      "filter/url-rewrite.js",
+      "http/service.js",
+      "http/metrics.js",
+      "http/tracing.js",
+      "http/logging.js",
+      "http/circuit-breaker.js",
+      "http/throttle-domain.js",
+      "http/throttle-route.js",
+      "http/error-page.js",
+      "http/proxy-redirect.js",
+      "http/forward.js",
+      "http/default.js"
+    ],
+    "HTTPSRoute": [
+      "common/access-control.js",
+      "common/ratelimit.js",
+      "common/tls-termination.js",
+      "common/consumer.js",
+      "http/codec.js",
+      "http/access-log.js",
+      "http/auth.js",
+      "http/route.js",
+      "http/fault-injection.js",
+      "filter/request-redirect.js",
+      "filter/header-modifier.js",
+      "filter/url-rewrite.js",
+      "http/service.js",
+      "http/metrics.js",
+      "http/tracing.js",
+      "http/logging.js",
+      "http/circuit-breaker.js",
+      "http/throttle-domain.js",
+      "http/throttle-route.js",
+      "http/error-page.js",
+      "http/proxy-redirect.js",
+      "http/forward.js",
+      "http/default.js"
+    ],
+    "TLSPassthrough": [
+      "common/access-control.js",
+      "common/ratelimit.js",
+      "tls/passthrough.js",
+      "common/consumer.js"
+    ],
+    "TLSTerminate": [
+      "common/access-control.js",
+      "common/ratelimit.js",
+      "common/tls-termination.js",
+      "common/consumer.js",
+      "tls/forward.js"
+    ],
+    "TCPRoute": [
+      "common/access-control.js",
+      "common/ratelimit.js",
+      "tcp/forward.js"
+    ]
+  },
+  "Version": "0"
+}
\ No newline at end of file