diff --git a/speeduino/sensors.ino b/speeduino/sensors.ino
index dca6904..2587fb6 100644
--- a/speeduino/sensors.ino
+++ b/speeduino/sensors.ino
@@ -43,6 +43,7 @@ void initialiseADC()
      BIT_CLEAR(ADCSRA,ADPS0);
   #endif
   MAPcurRev = 0;
+  MAPcount = 0;
 #endif
 }
 
diff --git a/speeduino/speeduino.ino b/speeduino/speeduino.ino
index f9e2b07..83c0a56 100644
--- a/speeduino/speeduino.ino
+++ b/speeduino/speeduino.ino
@@ -824,6 +824,7 @@ void loop()
       secCounter = 0; //Reset our seconds counter.
       currentStatus.startRevolutions = 0;
       MAPcurRev = 0;
+      MAPcount = 0;
       currentStatus.rpmDOT = 0;
       ignitionOn = false;
       fuelOn = false;