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vk efi stalling when reaching 1/4 heat

sykechri

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Joined
Sep 13, 2012
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Australia
Members Ride
84 vk calais 202 efi
hi im getting my self confused in diagnosing a fault in my vk 202 efi.
Almost everytime i drive it till it reaches 1/4 heat it stalls or if im driving at speed it runs rough and trys stall it last max of 5 secs. Then 30seconds after this happens the temp moves to the next notch everytime so it is heat related. A message comes up on the dash coolant low. The car always cranks and fires first go after this happens with no more problems. But with this getting dangerous i decided to have a look at it. I was thinking maybe the temp sensor was shorting out at a set temp and going into a safe mode and stalling the car. so with the car running i disconnected the sensor and it stalled proving to myself it has a safety cut off. I installed a new 1 but it still stalls and new message on the screen is "monitor". Can anyone please help me.
 
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