diff --git a/selfdrive/car/fw_versions.py b/selfdrive/car/fw_versions.py
index 6da282d7ec..4f51c8e1a3 100755
--- a/selfdrive/car/fw_versions.py
+++ b/selfdrive/car/fw_versions.py
@@ -72,6 +72,7 @@ def match_fw_to_car_fuzzy(fw_versions_dict, log=True, exclude=None):
         all_fw_versions[(addr[1], addr[2], f)].append(candidate)
 
   matched_ecus = set()
+  match_count = 0
   candidate = None
   for addr, versions in fw_versions_dict.items():
     for version in versions:
@@ -81,12 +82,14 @@ def match_fw_to_car_fuzzy(fw_versions_dict, log=True, exclude=None):
 
       if len(candidates) == 1:
         matched_ecus.add(ecu_key)
+        match_count += 1
         if candidate is None:
           candidate = candidates[0]
         # We uniquely matched two different cars. No fuzzy match possible
         elif candidate != candidates[0]:
           return set()
 
+  print(candidate, match_count, len(matched_ecus), match_count == len(matched_ecus))
   if len(matched_ecus) >= 2:
     if log:
       cloudlog.error(f"Fingerprinted {candidate} using fuzzy match. {len(matched_ecus)} matching ECUs")
diff --git a/selfdrive/debug/internal/fuzz_fw_fingerprint.py b/selfdrive/debug/internal/fuzz_fw_fingerprint.py
index 81dca9af77..0c5743618a 100755
--- a/selfdrive/debug/internal/fuzz_fw_fingerprint.py
+++ b/selfdrive/debug/internal/fuzz_fw_fingerprint.py
@@ -24,16 +24,13 @@ if __name__ == "__main__":
   wrong_match = 0
   confusions = defaultdict(set)
 
-  for _ in tqdm(range(1)):
+  for _ in tqdm(range(10)):
     for candidate, fws in FWS.items():
       fw_dict = {}
       for (tp, addr, subaddr), fw_list in fws.items():
         fw_dict[(addr, subaddr)] = [random.choice(fw_list)]
 
-      print(f"Testing {candidate}")
-      matches = match_fw_to_car_fuzzy(fw_dict, log=False)
-      print(matches)
-      print()
+      matches = match_fw_to_car_fuzzy(fw_dict, log=False, exclude=candidate)
 
       total += 1
       if len(matches) == 1: