First be sure the coolant level is not to low, if the level is okay check engine temp gauge, it should reach normal operating temp (aprox 200 degrees F). If not replace the thermostat. If it does reach normal operating temp feel both heater hoses with your hands. They should both be almost the same temp (hot). If one is hot and the other is warm or cold flush the heater core, it is plugged.
ok well in the summer i blew a heater hose because i put a lift kit in and didn't lenghten the heater house but anyways it broke the plastic piece that rubber hose goes on so i never put the plastic peice back on just by passed it would it be because there is no restricker in there to slow down the coolant would that do it...if not i'lll check the hose's t.m to see what i find...thanks
Probablty low on coolant. Check the level after the engine has cooled.
bISS iDLE SCREW ON THE THROTTLE BODY
1995 MonteCarlo i have heat when car is idle but when you put in gear and you give it gas has no heat any thoughts i have already had the head gaskets replaced and the heater core flushed but still no heat
Idle Air Control Valve.
5 to 6 hundred rpms. Is recommended idle
The Devil Makes Work for Idle Hands was created in 2000.
Eric Idle Sings Monty Python was created in 2000.
Idle speed is controled by the computer, therefore non adjustable.
Could be your idle valve
2000 gmc serria 5.3 vortec,had new crank shaft put in along with berrings now truck dont run right,rough idle,check engine light comes on stays on 2 or 3 days then goes off.sometimes will not start on first crank,usally 2/nd or 3/rd time,burning lot of gas
on the throttel body
There is no idle screw. The idle air control valve controls the idle and can be set on different settings. You should consult a Ford dealer or mechanic for proper settings.