(This answer Covers the "Generation 3" 1996-1999 Series Ford Motor Company Ford Taurus and Mercury Sable.)
The only "immobilizer" security system available is "Securilock PATS" (Passive Anti Theft System). This system is designed to prevent the engine from being started unless a coded key programmed to your vehicle is used.
The Following Ford Motor Company Taurus and Mercury Sable had PATS available Standard.
1996 Ford Taurus LX
1996 Ford Taurus SHO
1996 Mercury Sable
1998 Taurus SE Sport
All Duratec Equipped Taurus and Sables have PATS.
The standard Anti-Theft system that comes on the 1996 Taurus lower and non-Duratec models is a Locking Steering wheel and an Anti-siphon gas filler tube.
To lock the steering wheel, remove the key from the ignition and turn the steering wheel slightly. It will lock into place. This prevents a typical "brute force" attack in which one would use a special tool to engage the key. It locks the key slot in place. Some vehicles may not have this feature. To disengage the steering wheel lock, Insert the Key into the ignition, and slightly turn it to start it, turn the wheel slightly in the direction it was locked and continue to try to turn the key. It will unlock and the steering lock will disable allowing you to start and drive the car. This may take practice as where the vehicle is parked, the direction the wheels are facing and the surface you are parked on may produce different levels of resistance, and may make it difficult or impossible to engage and disengage.
For more information on your PATS system, See the included link below for the Ford PF71 Police interceptor. It has the same PATS system implemented on the high level 1996 models as well as the newer 98 models. (PATS systems are the same for all vehicles that are equipped with it)
Although the article says that aftermarket remote starters cannot be used, this is incorrect. Many companies offer "interface" units that allow PATS to function in conjunction with your remote starter.
The Mercury Sable and the Ford Taurus will have DOC in printed on the engine if they are dual overhead cam engines. The symbol should be on the top of the engine.
Could be sucking air into intake.
I want to know the signal that immobilizer send to stop the car engine
It will fit into the engine bay, but the wiring is different from early model third generation Taurii to late model third gens, so an electrical conversion would be required.
My 2002 manual says: 11.6 quarts for the Vulcan engine and 10.6 for the Duratec.
The Taurus and Sables come off the same assembly line - using many of the same parts. If the engine is the same - same year of vehicle - etc., then it is very likely the engines would be interchangeable.
This may be a problem with the immobilizer, the engine isn't disonnecting the immobilizer from the engine, i.e. stopping the engine from being started.
You run the engine till warm then look underneath and see if the pump is leaking. A faulty pump leak is very visible in Taurus/Sable.
The 2000 Ford Taurus body control module is located on the firewall in the engine compartment. The module will be on the passenger side, near the bottom, of the firewall.
u cant the immobilizer is built into the engine mine went i had to keep inserting the key in and out of the ignition
The 2014 Ford Taurus has a V6 engine.
The 2003 Ford Taurus has a V6 engine.