When i park car and get out the front release air and front drops down to almost on tires when i start it back up it airs up and everything seams fine is this normal

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After TPMS sensor replacement or tire rotation, reprogramming is required. 1. key on engine off, parking brake on. 2. turn park lights on and off 4 times you will hear a horn chirp twice, you are in program mode. Start at L/F tire release air for 10 seconds, wait 15 seconds until horn chirp, after chirp go to R/F tire do the same until horn chirp then R/R let air out til the chirp then L/R do the same after the L/R chirp, turn key off and you are done, note you have only 5 min. to complete. If you do not hear horn chirp at each tire, you will have to start from beginning. When complete, remember to add air to each tire, 35 psi is recommended.

If it's the same air valve that releases the parking brake then replace it so the brakes won't drag because of low air pressure. Air is APPLIED to release the brake so if the system air pressure starts to go low the parking brake will start to apply. This will eventually cause the brake drum to overheat and possibly start a tire fire.

Try this from my previous post....

Have a similar problem... My 2003 Lincoln Navigator was manufactured May 22, 2003 so it's the late model that came with the Intec 5.4 Liter DOHC V-8 (not the Triton engine).

I replaced the two front ride height sensors (one for each air strut) and replaced the one rear ride height sensor that controls the ride height for BOTH rear air struts. (Yours may have one ride height sensor for each of the rear air struts.) That solved the problem for a few months during the warm months, until the weather started cooling off. Then back to the same issue.

The front passenger air strut started releasing air from the solenoid (air block) making a "hissing sound." Replaced BOTH front air strut solenoids (connected at the top of each air strut). That also resolved the problem for a few days. After going all around the world, I discovered it's the Air Ride Control Module (ASM) that was the problem all along.

Maybe you didn't bleed all of the air out of your coolant systtem.
I had a very similar problem, last month, my heat would not go above 50 degrees F.

I had air in my heater core.

I put wheel blocks behind the back tires and engaged the emergancy brake.
I jacked the front of my van up so both tires were off the ground (about 3")
I removed the radiator cap, started the engine, and turned the heat on high.
I added antifreeze, until it was full.
I let the engine continue to run, as I watched the antifreeze level go back down, then I added more antifreeze.
After doing this 2 times, I squeezed and held the upper radiator hose. I did not release it.
I started pouring more antifreeze in and when it started to over-flow, I still kept pouring as slowly released the hose.
With the raditator level full, I replaced the cap and put some antifreeze in the coolant reservoir.
Lowered the front back to the ground and removed the tire blocks.
I stuck a guage in the inside vent and I now get a 125 degree reading.

Note...after I got the van jacked up, it only took me 15 minutes to get the air out of the system (mainly, because I squeezed and held the hose).

That usually means that one or more of your tires has dropped below the level of air pressure that the manufacturer recommends. It is basically a low pressure warning light. This way you will know to find a place to check your tire pressures. Look on your tires sidewall and you will find a cold psi rating and a hot or warm psi rating. The tire pressures need to stay within those parameters in order for the light to not come on. As the tire warms from motion the air inside begins to expand and will read a higher pressure than if the tire is cold. Check your pressures and if any of the tires have a low pressure (below 30 psi) it should be inspected...........Or you may be leaving your emergency brake on. Pull up then push down to release a hand break lever and push all the way down and pull hard on the release lever for a foot brake. Another possibility is the car needs brake pads soon.

Sounds like you need the compressor and airlines checked out.

If you are talking about your low tire pressure sensors, theres a button in the glove compartment. Press it for 5 seconds to reset the sensors.

okay 1. key on engine off, parking brake on. 2. turn park lights on and off 4 times you will hear a horn chrip you are in program mode.start at L/F tire release air may take 10 seconds continue to release air until horn chrip, after chrip go to R/F tire do the same until horn chrip then R/R let air out til the chrip then L/R do the same after the L/R chrip turn key off, go and set all 4 tire preasures and your done, note you have only 5 min. to complete this so have valve caps off and some thing to push on the stem to let the air out.hope this helps,

Shut off pump switch located in drivers side panel door in trunk. Jack up car at frame and support with jack stands. This will make sure the car does not come down on you when you release the air.
Pop retaining off of solenoid valve located at top of airbag and turn valve to first stop till air starts releasing