1995 Buick Roadmaster V8 Two Wheel Drive Automatic
95 Buick with LT1 motor. At low RPM's or idle you get next to no heat out of the heater raise the rpm and it gets hotter. With the motor temp gage at little over a quarter running down the freeway in drive you get very little heat drop it down into 3rd gear higher r's and it warms up.
Checked all to regular stuff the water temp flowing into the top of the radiator is at 160 degrees. Which should be more than enough for the heater. Oh ya I flushed the core. Had a 95 Chevy that did the same thing Is there a problem with the flow design or what.