Mercury cougar wont start

could be worn ignition swtich.check battery and connection

a bad security system would restrict the ignition system from activating so the engine may be perfectly fine but until the security system give it the ok, its gonna sit. have someone take a look at the security system and see if they cant fix the system or deactivate it (what use is a security system if your car wont start right?)

I replace one of the blue 20amp fuse under the hood number 40 or 41.... Then mine started but, now the car is not running like it should... The motor runs ruff and sounds like it has a tap in the motor... Hope this helped

Have you ran an Oil pressure test? low oil pressure (20lb)or no oil pressure(0lb)and the lifters will not open the valves enough to let fuel in to the cylinder to start your engine!

i would say its a bad connection on the battery,does the lights dim when you try starting or does everything seem normal,take a good look at the battery termanals i think you have aloose wire.please rate this answer.adrian,,,,,,,

Take another look at the battery, clean the posts and the terminal ends. Charge the battery, or jumpstart from another vehicle, and allow it to run for 5 to 10 minutes. Shut the vehicle off and see if it will start again. If not you will most likely need to replace the battery.

V6 ? 4CYL? Have you verified SPARK? Did anyone check the "fuel pump inertia switch?" Its in the right front kick panel. If it was a "Anti-theft Issue" the light would be on or flashing.

could be a bad ground cable .replace battery cables if they havent been change in a while.if it still dont crank .remove starter have it tested.at advance auto parts and auto zone. if starter good.replace starter solenoid or relay.

I've had similar problems with mine. Try checking the cables that run between your battery and your alternator to make sure you're getting enough feed between the two. If those are ok, have your alternator checked. I've had mine replaced 5 times since I bought the car new in 1999 and the car apparently doesn't act like most other vehicles when it's going out. If the test comes back ok, test it again. I recommend having the alternator tested at least 3 times before deciding that's not the issue. Also, I know it's a simple thing but clean your connector posts on the top of your battery to make sure you're getting a good connection. Figuring out that was the problem sometimes has saved alot of hours under the hood. Good luck!!

the fuel filter is either blocked or installed in the wrong direction.the rotor and distributor cap are fine. swop the fuel filter around and try again.