Almost no heat at idle?
#1
Almost no heat at idle?
Used the search, didn't mind much -
Ambient temp is high 20s to low 30s. At idle I get almost no heat - wait, let me finish...
Even after the truck warms up, at idle the heater is blowing borderline cold air. However, when it is running at 1500 - 2000 RPM I can barely hold my hand in front of the heating vent. Hate it think it's a water pump but not sure what else would cause that...
I flushed coolant about a week ago, this is the first time it's been cold enough to really use the heat, Could this also be a symptom of air in the heater core?
Ambient temp is high 20s to low 30s. At idle I get almost no heat - wait, let me finish...
Even after the truck warms up, at idle the heater is blowing borderline cold air. However, when it is running at 1500 - 2000 RPM I can barely hold my hand in front of the heating vent. Hate it think it's a water pump but not sure what else would cause that...
I flushed coolant about a week ago, this is the first time it's been cold enough to really use the heat, Could this also be a symptom of air in the heater core?
#4
These engines at idle are barely heating 300°F EGT. Most of that heat goes out the exhaust, Some into the oil and out the Oil Cooler and some makes it thru the block and into the Coolant.
It takes a while to warm up a cold soaked engine block. And it's not producing a lot of heat to even maintain coolant temps when sit and idle.
contrast that to having 800°-900°F EGTs when you have 15-20 lbs boost going through a working engine
What are your coolant temps at idle when you have no heat?
It takes a while to warm up a cold soaked engine block. And it's not producing a lot of heat to even maintain coolant temps when sit and idle.
contrast that to having 800°-900°F EGTs when you have 15-20 lbs boost going through a working engine
What are your coolant temps at idle when you have no heat?
#7
Trending Topics
#8
Heat at idle
That's a good thought, I will be pulling vacuum on the system tonight.
It's really strange as I'll get heat if the rpm are 1500 to 2000, other than that nothing.
Also discovered this morning that the hubs aren't engaging with 4wd. Had to manually lock the hubs in order for it to work.
It's really strange as I'll get heat if the rpm are 1500 to 2000, other than that nothing.
Also discovered this morning that the hubs aren't engaging with 4wd. Had to manually lock the hubs in order for it to work.
Thread
Thread Starter
Forum
Replies
Last Post
bad_habit59
1987 - 1996 F150 & Larger F-Series Trucks
4
04-21-2008 02:06 AM