diff --git a/daemon/test_daemon.go b/daemon/test_daemon.go
index 4f889d7bf..1f3af5c18 100644
--- a/daemon/test_daemon.go
+++ b/daemon/test_daemon.go
@@ -47,6 +47,7 @@ import (
 	"github.com/bsv-blockchain/teranode/test/utils/wait"
 	"github.com/bsv-blockchain/teranode/ulogger"
 	"github.com/bsv-blockchain/teranode/util"
+	libp2pPeer "github.com/libp2p/go-libp2p/core/peer"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 	tc "github.com/testcontainers/testcontainers-go/modules/compose"
@@ -460,8 +461,13 @@ func NewTestDaemon(t *testing.T, opts TestOptions) *TestDaemon {
 	blockAssembler, ok := blockAssemblyService.(*blockassembly.BlockAssembly)
 	require.True(t, ok)
 
+	assetURL := fmt.Sprintf("http://127.0.0.1:%d", appSettings.Asset.HTTPPort)
+	if appSettings.Asset.APIPrefix != "" {
+		assetURL += appSettings.Asset.APIPrefix
+	}
+
 	return &TestDaemon{
-		AssetURL:              fmt.Sprintf("http://127.0.0.1:%d", appSettings.Asset.HTTPPort),
+		AssetURL:              assetURL,
 		BlockAssembler:        blockAssembler.GetBlockAssembler(),
 		BlockAssemblyClient:   blockAssemblyClient,
 		BlockValidationClient: blockValidationClient,
@@ -1294,6 +1300,25 @@ func (td *TestDaemon) WaitForBlockStateChange(t *testing.T, expectedBlock *model
 	}
 }
 
+func (td *TestDaemon) WaitForBlockhash(t *testing.T, blockHash *chainhash.Hash, timeout time.Duration) {
+	ctx, cancel := context.WithTimeout(td.Ctx, timeout)
+	defer cancel()
+
+	for {
+		select {
+		case <-ctx.Done():
+			t.Errorf("Timeout waiting for block with hash %s", blockHash.String())
+			return
+		default:
+			_, err := td.BlockchainClient.GetBlock(ctx, blockHash)
+			if err == nil {
+				return
+			}
+			time.Sleep(100 * time.Millisecond)
+		}
+	}
+}
+
 func (td *TestDaemon) WaitForBlock(t *testing.T, expectedBlock *model.Block, timeout time.Duration, skipVerifyChain ...bool) {
 	ctx, cancel := context.WithTimeout(td.Ctx, timeout)
 	defer cancel()
@@ -1865,6 +1890,25 @@ func (td *TestDaemon) DisconnectFromPeer(t *testing.T, peer *TestDaemon) {
 	require.NoError(t, err, "Failed to disconnect from peer")
 }
 
+func (td *TestDaemon) InjectPeer(t *testing.T, peer *TestDaemon) {
+	peerID, err := libp2pPeer.Decode(peer.Settings.P2P.PeerID)
+	require.NoError(t, err, "Failed to decode peer ID")
+
+	p2pService, err := td.d.ServiceManager.GetService("P2P")
+	require.NoError(t, err, "Failed to get P2P service")
+
+	p2pServer, ok := p2pService.(*p2p.Server)
+	require.True(t, ok, "Failed to cast P2P service to Server")
+
+	// Inject my peer info to other peer...
+	header, meta, err := peer.BlockchainClient.GetBestBlockHeader(td.Ctx)
+	require.NoError(t, err, "Failed to get best block header")
+
+	p2pServer.InjectPeerForTesting(peerID, peer.Settings.Context, peer.AssetURL, meta.Height, header.Hash().String())
+
+	t.Logf("Injected peer %s into %s's registry (PeerID: %s)", peer.Settings.Context, td.Settings.Context, peerID)
+}
+
 func peerAddress(peer *TestDaemon) string {
 	return fmt.Sprintf("/dns/127.0.0.1/tcp/%d/p2p/%s", peer.Settings.P2P.Port, peer.Settings.P2P.PeerID)
 }
diff --git a/services/p2p/server_helpers.go b/services/p2p/server_helpers.go
index 5fa4d043a..6f6c0515c 100644
--- a/services/p2p/server_helpers.go
+++ b/services/p2p/server_helpers.go
@@ -480,6 +480,23 @@ func (s *Server) addConnectedPeer(peerID peer.ID, clientName string, height uint
 	}
 }
 
+// InjectPeerForTesting directly injects a peer into the registry for testing purposes.
+// This method allows deterministic peer setup without requiring actual P2P network connections.
+func (s *Server) InjectPeerForTesting(peerID peer.ID, clientName, dataHubURL string, height uint32, blockHash string) {
+	s.addConnectedPeer(peerID, clientName)
+	s.updateDataHubURL(peerID, dataHubURL)
+	s.updateBlockHash(peerID, blockHash)
+	s.updatePeerHeight(peerID, int32(height))
+
+	if s.peerRegistry != nil {
+		s.peerRegistry.UpdateStorage(peerID, "full")
+	}
+
+	if s.syncCoordinator != nil {
+		s.syncCoordinator.UpdatePeerInfo(peerID, int32(height), blockHash, dataHubURL)
+	}
+}
+
 func (s *Server) removePeer(peerID peer.ID) {
 	if s.peerRegistry != nil {
 		// Mark as disconnected before removing
diff --git a/services/p2p/sync_coordinator.go b/services/p2p/sync_coordinator.go
index 1aa37eefe..c77110402 100644
--- a/services/p2p/sync_coordinator.go
+++ b/services/p2p/sync_coordinator.go
@@ -503,7 +503,7 @@ func (sc *SyncCoordinator) logCandidateList(candidates []*PeerInfo) {
 func (sc *SyncCoordinator) periodicEvaluation(ctx context.Context) {
 	defer sc.wg.Done()
 
-	ticker := time.NewTicker(30 * time.Second)
+	ticker := time.NewTicker(sc.settings.P2P.SyncCoordinatorPeriodicEvaluationInterval)
 	defer ticker.Stop()
 
 	for {
diff --git a/settings/interface.go b/settings/interface.go
index 1c6dc18b8..afce24a90 100644
--- a/settings/interface.go
+++ b/settings/interface.go
@@ -451,6 +451,9 @@ type P2PSettings struct {
 
 	// Node mode configuration (full vs pruned)
 	AllowPrunedNodeFallback bool // If true, fall back to pruned nodes when no full nodes available (default: true). Selects youngest pruned node (smallest height) to minimize UTXO pruning risk.
+
+	// This is the time we trigger a periodic evaluation in the sync coordinator
+	SyncCoordinatorPeriodicEvaluationInterval time.Duration
 }
 
 type CoinbaseSettings struct {
diff --git a/settings/settings.go b/settings/settings.go
index 40f1e6020..d7df011eb 100644
--- a/settings/settings.go
+++ b/settings/settings.go
@@ -400,6 +400,7 @@ func NewSettings(alternativeContext ...string) *Settings {
 			AllowPrivateIPs: getBool("p2p_allow_private_ips", false, alternativeContext...), // Default false for production safety
 			// Full/pruned node selection configuration
 			AllowPrunedNodeFallback: getBool("p2p_allow_pruned_node_fallback", true, alternativeContext...),
+			SyncCoordinatorPeriodicEvaluationInterval: getDuration("p2p_sync_coordinator_periodic_evaluation_interval", 30*time.Second, alternativeContext...),
 		},
 		Coinbase: CoinbaseSettings{
 			DB:                    getString("coinbaseDB", "", alternativeContext...),
diff --git a/test/e2e/daemon/ready/multi_node_inject_test.go b/test/e2e/daemon/ready/multi_node_inject_test.go
new file mode 100644
index 000000000..c1ab38387
--- /dev/null
+++ b/test/e2e/daemon/ready/multi_node_inject_test.go
@@ -0,0 +1,124 @@
+package smoke
+
+import (
+	"fmt"
+	"net/url"
+	"testing"
+	"time"
+
+	"github.com/bsv-blockchain/teranode/daemon"
+	"github.com/bsv-blockchain/teranode/services/blockchain"
+	"github.com/bsv-blockchain/teranode/settings"
+	"github.com/bsv-blockchain/teranode/test/utils/aerospike"
+	"github.com/stretchr/testify/require"
+)
+
+func getAerospikeInstance(t *testing.T) *url.URL {
+	urlStr, teardownFn, err := aerospike.InitAerospikeContainer()
+	require.NoError(t, err, "Failed to setup Aerospike container")
+
+	url, err := url.Parse(urlStr)
+	require.NoError(t, err, "Failed to parse UTXO store URL")
+
+	t.Cleanup(func() {
+		_ = teardownFn()
+	})
+
+	return url
+}
+
+func getTestDaemon(t *testing.T, settingsContext string, aerospikeURL *url.URL) *daemon.TestDaemon {
+	d := daemon.NewTestDaemon(t, daemon.TestOptions{
+		EnableRPC:       true,
+		EnableP2P:       true,
+		EnableValidator: true,
+		SettingsContext: settingsContext,
+		SettingsOverrideFunc: func(s *settings.Settings) {
+			s.P2P.PeerCacheDir = t.TempDir()
+			s.UtxoStore.UtxoStore = aerospikeURL
+			s.ChainCfgParams.CoinbaseMaturity = 2
+			s.P2P.SyncCoordinatorPeriodicEvaluationInterval = 1 * time.Second
+		},
+		FSMState: blockchain.FSMStateRUNNING,
+		// EnableFullLogging: true,
+	})
+
+	t.Cleanup(func() {
+		d.Stop(t)
+	})
+
+	return d
+}
+
+func printPeerRegistry(t *testing.T, td *daemon.TestDaemon) {
+	registry, err := td.P2PClient.GetPeerRegistry(t.Context())
+	require.NoError(t, err)
+
+	fmt.Printf("\nPeer %s (%s) registry:\n", td.Settings.ClientName, td.Settings.P2P.PeerID)
+
+	for _, peerInfo := range registry {
+		fmt.Printf("\tName: %s (%s): Height=%d, BlockHash=%s, DataHubURL=%s", peerInfo.ClientName, peerInfo.ID, peerInfo.Height, peerInfo.BlockHash, peerInfo.DataHubURL)
+	}
+
+	fmt.Println()
+	fmt.Println()
+}
+
+// This test creates 2 nodes, and nodeA mines 3 blocks.  Then we inject nodeA into nodeB, and nodeB should sync up to nodeA's height.
+func Test_NodeB_Inject_After_NodeA_Mined(t *testing.T) {
+	SharedTestLock.Lock()
+	defer SharedTestLock.Unlock()
+
+	sharedAerospike := getAerospikeInstance(t)
+	nodeA := getTestDaemon(t, "docker.host.teranode1.daemon", sharedAerospike)
+	nodeB := getTestDaemon(t, "docker.host.teranode2.daemon", sharedAerospike)
+
+	t.Log("         Creating initial blockchain: [Genesis] -> [Block1] -> [Block2] -> [Block3]")
+	coinbaseTx := nodeA.MineToMaturityAndGetSpendableCoinbaseTx(t, nodeA.Ctx)
+	t.Logf("         Coinbase transaction available for spending: %s", coinbaseTx.TxIDChainHash().String())
+
+	// nodeA.InjectPeer(t, nodeB)
+	nodeB.InjectPeer(t, nodeA)
+
+	printPeerRegistry(t, nodeB)
+
+	nodeABestBlockHeader, _, err := nodeA.BlockchainClient.GetBestBlockHeader(nodeA.Ctx)
+	require.NoError(t, err)
+
+	nodeB.WaitForBlockhash(t, nodeABestBlockHeader.Hash(), 10*time.Second)
+
+}
+
+// This test creates 2 nodes, and nodeB injects nodeA before nodeA mines any blocks.  Then we mine 3 blocks on nodeA, and nodeB should sync up to nodeA's height.
+func Test_NodeB_Inject_Before_NodeA_Mined(t *testing.T) {
+	SharedTestLock.Lock()
+	defer SharedTestLock.Unlock()
+
+	sharedAerospike := getAerospikeInstance(t)
+	nodeA := getTestDaemon(t, "docker.host.teranode1.daemon", sharedAerospike)
+	nodeB := getTestDaemon(t, "docker.host.teranode2.daemon", sharedAerospike)
+
+	// nodeA.InjectPeer(t, nodeB)
+	nodeB.InjectPeer(t, nodeA)
+
+	printPeerRegistry(t, nodeB)
+
+	// go func() {
+	// 	for {
+	// 		time.Sleep(5 * time.Second)
+	// 		printPeerRegistry(t, nodeB)
+	// 	}
+	// }()
+
+	t.Log("         Creating initial blockchain: [Genesis] -> [Block1] -> [Block2] -> [Block3]")
+	coinbaseTx := nodeA.MineToMaturityAndGetSpendableCoinbaseTx(t, nodeA.Ctx)
+	t.Logf("         Coinbase transaction available for spending: %s", coinbaseTx.TxIDChainHash().String())
+
+	printPeerRegistry(t, nodeB)
+
+	nodeABestBlockHeader, _, err := nodeA.BlockchainClient.GetBestBlockHeader(nodeA.Ctx)
+	require.NoError(t, err)
+
+	nodeB.WaitForBlockhash(t, nodeABestBlockHeader.Hash(), 26*time.Second)
+
+}