Hope you had an earlier answer for this problem. The air sound could be the air suspension running after a long time of sitting inactive. As for choking, it does not quite describe how the fuel enrichment system works. The "cold start sequence" is suppose to increase the idle speed and enrichen the fuel ratio until the engine warms up.
If the engine speed is low on start-up, the cold start sequence is not working. The water temperature sensor gives the cue for this system to work. Low antifreeze levels or dirty or defective temperature sensors can affect this. Some vehicles have 2 sensors with 1 operating dash gauges and the other the engine controls. A few sensors operate off of manifold heat without making contact with antifreeze.
There is also the possibility of water in the fuel through condensation similar to a pop bottle sweating. Use 1 or 2 bottles of a product called "HEET" into the gas tank and start the car. You will see clouds of vapor coming from the exhaust if the water was present.
SOURCE: I have a 1978 Chevy
the check valve in the fuel pump may have gone bad causing fuel to leave the carb and lines thus losing the prime ....as far as the choke i wonder if it is getting power and if the vacum pull off is working.
SOURCE: 98 Lincoln Continental Whistling Noise From left Front end?
try sticking your hand out the window while driving and cover up the seem on the side mirrors. ususally those make loud whislte noises
SOURCE: NEED DIAGRAM FOR BELT REPLACEMENT AND INSTRUCTIONS
Here is a diagram of your belt, leave me a feed back and thanks for using FIX YA
http://www.2carpros.com/car_repair_information/tec_info/1999/lincoln/town_car/1999_lincoln_town%20car_drive_belt_routing_diagram.htm
SOURCE: 1998 lincoln continental idles very rough
Has your engine gotten wet? Sounds like water around your spark plug boots down in the port around the spark plugs. If there is any water down there, make sure you blow it out with air compressor prior to removing plugs, or it will drain directly into the engine. Another scenario, could be EGR valve or related parts. Is your check engine light on? With that rough of a ride, it should be. If it is an auto parts store should be able to read the code to help pin point the problem. Good Luck!
SOURCE: HOW TO REPAIR FUEL INJECTION FOR GMC YUKON 98
check for plugged fuel filter on the frame rail on driver side, blow through it to see if it is plugged. also have fuel pressure checked if it is below 60 psi replace fuel pump
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