On cold mornings my 2006 lincoln zephyr has a hard time starting, but after that it starts fine the rest of the day.

To reset the anti theft on your 2006 lincoln zephyr, turn your ignition key from off to run 8 times and depress any button on your remote.

The thing to do is have the vehicle hooked up to diagnostic scan tool . Viewing engine sensor data ,see whats off . The computer may think the vehicle is warmer then it is an giving it less fuel . Checking coolant temp sensor data , IAT - intake air temp sensor . 048 Engine Hard to Start or No Start Scan Data for Starting Problems

Where you at Kim,north pole,helping Santa,lol,How many cold cranking amps is your battery,may need a stronger one,Try this to see,remove battery overnight,store in your warm house,then in morning install back in car and see if it will start,if it does then battery is too weak for your Lincoln.Also metal shrinks in cold weather.

I would get the battery checked,if they fail they make the car do all sorts of weird things.Also get the earths of the battery and other looms checked.If a computer or electrical item isnt earthed properly,that too can cause odd things

Hello
The engine and automatic transmission in this vehicles drive train are fully electronically controlled by a computer called the PCM and TCM (Power Train Control Module, Transmission Control Module). When a problem like this or other drive-ability related problems occurs the computer stores a record of the problem (there are of course some exceptions to this, like the fuel pump, engine coolant temperature sensor and MAF sensor for instance) in the form of a fault code in its memory, to read these fault codes you must have the systems memory scanned with a special tool. Once the fault code(s) are read you then must perform the appropriate diagnostic testing to find and resolve the problem(s) DO NOT REPLACE ANY PARTS UNTIL A TRAINED TECHNICAIN HAS DIAGNOSED THE PROBLEM TO AVOID SPENDING YOUR HARD EARNED MONEY ON PARTS THAT MAY NOT CORRECT THE PROBLEM

check the spark plug gaps ,25 th if too wide it will not start

Mine is doing the exact same thing! The first time it completely failed to turn over was last week on 12/7/10. A jump start got it going and although it was hesitant to turn over on a few occasions afterwards, it would start ... until this morning, 12/14/10. I do not have a solution yet, but if you find out anything, please post it here. I will do the same.

check for antenna ground if corroded relocalize the ground.

Remove fuses 10 and 11 in the underhood junction box. Leave out for 5 minutes then reinstall. If the seats start working your Zephyrs dual climate control seat module will need replaced.

manually lock the door with the key this may reset the alarm