AC blend air doors operate off of engine vacuum and when you press the gas pedal vacuum decreases. The vacuum lines for AC control have a check valve (under the hood along the firewall) and a vacuum reservoir which are supposed to keep vacuum on the system when engine vacuum is low. Check that all lines are good with no leaks and that check valve is working. Even a small vacuum leak can cause this issue.
SOURCE: How do you replace a Cabin Air Filter and air filter for vented front seats?
The seat filters are located underneath each seat, driver and passenger. Slide seat(s) all way forward. From the rear reach underneath and feel for a small square filter, about 2x3in. Grasp an edge and pull down , it will pop out. Replace same way. Good hunting finding replacements. Had to go to a dealer and order.
SOURCE: heater is blowing but its cold air not hot air 2000 expedition
Make sure the heater core is in the open position by using the shut off valve and turning it to open. next, you may have a malfunction in the direction door the directs the air flow in the dash. a lever may have become lose or separated. may be a bad servo motor not directing the door to move to the heater position. i would start by checking that shut off valve first on the heater core.
SOURCE: AC not blowing cold air
Most likely the A/C system needs to be recharged with freon.
Most shops charge under $50 for this service.
SOURCE: AC blowing warm air
When they refilled the refrigerant did they put die in it to check for leaks, it sounds like there may be a leak.
SOURCE: i have black smoke blowing out the exhaust wen i step on the gas
I own a 2004 F-350 with the 6.0 Turbo Deisel...My wife has been driving it periodicll arround town and had mentioned from time to time it seemed to not want to get going. Well yesterday I went and picked the boat up and on my way home the truck lost all power and was spewing black smoke. After reading a few blogs I decided to pull the EGR Valve.. It sits right on top of the engine (from the front bumper looking at the engine) just forward and to the left of the oil filter. Two 8mm bolts and it comes off ( rotate back and forth while pulling up). The EGR valve was covered in soot and partialy in the open position..no matter how far I manually opened the valve it stayed in that position.. After checking the price of a new EGR ., I decided a little home remedy was in need.. I let the valve portion of the EGR ( the lower porting, NOT THE ACTUATING PORTION) soak in fuel over nite. Cleaned the soot off and lubricated the valve shaft. Actuated the valve manualy an few times and it began to spring closed beautifully..A tad more touch up cleaning..reinstalled the valve and was able to hear a feel a noticeble difference in the way the turbo spooled up... no black smoke .. and running smoother... Quick fix..easy fix.. so easy I plan to make this part of my oil change ritual... pull the valve .. clean and lube... HOPE THIS HELPS ! !
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