diff --git a/src/monocoque/devices/hapticeffect.c b/src/monocoque/devices/hapticeffect.c
index 2501a37..cf81bcf 100644
--- a/src/monocoque/devices/hapticeffect.c
+++ b/src/monocoque/devices/hapticeffect.c
@@ -43,9 +43,17 @@ int loadtyreconfig(SimData* simdata, char* configfile)
         return 1;
     }
 
+
     config_cars = config_lookup(&cfg, "cars");
 
+    if(config_cars == NULL)
+    {
+        config_destroy(&cfg);
+        return 1;
+    }
+
     int cars = config_setting_length(config_cars);
+
     int i = 0;
     while (i<cars)
     {
@@ -77,6 +85,7 @@ int loadtyreconfig(SimData* simdata, char* configfile)
         i++;
     }
 
+
     config_destroy(&cfg);
 
     return 0;
@@ -294,7 +303,7 @@ double slipeffect(SimData* simdata, int effecttype, int tyre, double threshold,
     wheelslip[2] = 0;
     wheelslip[3] = 0;
 
-    slogt("wheel vibration calculation");
+    slogt("wheel vibration calculation with wheel config set to %i configchecked %i configfile %s", useconfig, *configcheck, configfile);
 
     switch (effecttype)
     {
@@ -309,17 +318,27 @@ double slipeffect(SimData* simdata, int effecttype, int tyre, double threshold,
                 // avoid many opens of the same file
                 if(useconfig == 1 && configfile != NULL && *configcheck == 0)
                 {
+                    slogt("loading tyre config");
                     int error = loadtyreconfig(simdata, configfile);
                     *configcheck = 1;
                 }
+                else
+                {
+                    slogd("Skipping config check");
+                }
 
                 if(hasTyreDiameter(simdata)==false)
                 {
                     getTyreDiameter(simdata);
                     if(useconfig == 1 && hasTyreDiameter(simdata)==true)
                     {
+                        slogt("saving tyre config");
                         savetyreconfig(simdata, configfile);
                     }
+                    else
+                    {
+                        slogd("Skipping tyre diameter save");
+                    }
                 }
             }
             if(hasTyreDiameter(simdata)==true)
diff --git a/src/monocoque/monocoque.c b/src/monocoque/monocoque.c
index 6c1cfc7..284a9b3 100644
--- a/src/monocoque/monocoque.c
+++ b/src/monocoque/monocoque.c
@@ -106,7 +106,7 @@ int main(int argc, char** argv)
     free(diameters_file_str);
 
     slogi("Loading configuration file: %s", config_file_str);
-    slogd("using diameters file %s", ms->tyre_diameter_config);
+    slogd("using diameters file %s %i", ms->tyre_diameter_config, ms->configcheck);
     config_t cfg;
     config_init(&cfg);
     config_setting_t* config_devices = NULL;
@@ -246,6 +246,7 @@ int main(int argc, char** argv)
             pulseaudio = true;
 #endif
 
+            ms->useconfig = 0;
             error = tester(devices, numdevices);
             if (error == MONOCOQUE_ERROR_NONE)
             {