car wont start, help?

Question

i drive a 99 ford expedition and it has been normal all day but now it wont start, it starts but wont stay on, this has never happened before so im not familiar with whats going on. and something else caught my eye, when it starts and cuts off the theft light blinks (this has never happened before), so is my car in like "theft mode" and wont start because it think its being stolen? i dont know but PLEASE HELP ME!

Answer 1

sounds like the key may need to be replaced or recoded see ur dealer for this \

Answer 2

You don't happen to have a "speed pass" on your keychain do you ? This can affect your key.!
Or your key may need to be re-programmed.
the following is a copy of page 65 of the owners manual for a '99 Expedition.
<<<<<<<<<>>>>>>>>>>
SECURILOCKY PASSIVE ANTI-THEFT SYSTEM
Your vehicle is equipped with a coded-key anti-theft system. Only the
correct key will be able to start your vehicle. If your keys are lost or
stolen, you must take your vehicle to your dealership for key
reprogramming.
The SecuriLocky passive anti-theft system provides an advanced level of
vehicle theft protection. Your vehicle’s engine can only be started with
the two special SecuriLocky electronically coded keys provided with
your vehicle. Each time you start your vehicle, the SecuriLocky key is
read by the SecuriLocky passive anti-theft system. If the SecuriLocky
key identification code matches the code stored in the SecuriLocky
passive anti-theft system, the vehicle’s engine is allowed to start. If the
SecuriLocky key identification code does not match the code stored in
the system or if a SecuriLocky key is not detected (vehicle theft
situation), the vehicle’s engine will not operate.
The SecuriLocky passive anti-theft system is not compatible with
aftermarket remote start systems. Use of these systems may result in
vehicle starting problems and a loss of security protection. Large metallic
objects or devices such as the Mobil Speedpassy on the same key ring
as your SecuriLocky key may cause vehicle starting problems. These
objects and devices cannot damage the SecuriLocky key, but can cause
a momentary problem if they are too close to the key when starting the
engine. If a problem occurs, turn ignition off and restart the engine with
all other objects on the key ring held away from the SecuriLocky
ignition key.
Spare SecuriLocky keys can be purchased from your dealership and
programmed to your SecuriLocky passive anti-theft system. Refer to
Programming spare SecuriLocky keys for more information.
If one or both of your SecuriLocky keys are lost or stolen and you want
to ensure the lost or stolen key will not operate your vehicle, bring your
vehicle and all available SecuriLocky keys to your dealership for
reinitialization.

65
<<<<<<<<>>>>>>>>>

{{{{BTW- it is a "SecuriLock" system...the trademark symbol posts like a "Y" sorry...}}}}}

I'll post a link below to download the whole manual .
The download is free & you can save it to your computer if you like, for future reference. It's a pdf file.

Answer 3

Sounds like the immobiliser is acting up. Are you using the correct key? The immobiliser will shut the car off after a few seconds if it thinks that the incorrect key is being used. Best bet would be to use a different key or have the theft system checked by the dealer for faults.

Answer 4

Check your battery cables for proper connection also. If your cable is loose then everything else run by the computer may be wacko.

Answer 5

Sounds like the immobiliser is acting up.

Answer 6

try using your door key to lock and then unlock the driver's door and try again. I know it sounds stupid, but it's easy and won't cost you anything.