B16, B18, B20
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By 92dxeg
#322602 ok guys i have a gsr in my hatch. when the car warms up too about hafe way on the temp gauge amd i let off the throttle or come too a dead stop my rpm drop to 100 rpm and go up to 250-500 and go up and down for a few seconds then will go up to 800-900 no problem only happens when the temp gets hafe way. i do not think kmy rad fan is working it has lead me to belive that it is somthing in the coolant system becuze it only happens when the temp is hafe way. also my car takes forever to warm up in the cold then when it does if i have the heat on and drive it goes back down or if iam crusing down hill temp goes down what could this be?? could it be linked to the same issue ??