Car had intermittent problems with stalling/stuttering and then finally failed to start. Will not turn over. At the same time, the radio stopped working. Anti-theft light flashes all the time. When turned to accessory position, all the dummy lights come on. Windows go up and down. Door lock/unlock with remote. We have gone to salvage yard and got 3 PATS units w/ignition key and ignition switch. Replacing these items in sequence produced no results; it was the same with no change. By replacing the system as we did, we hoped to prevent a "bad chip" problem as they're called. Still haven't figured out how a chip goes bad like some say. It's just a ROM chip that sits there to be read by the ignition system. There's no power to it. The only way it should go bad is if you smashed the key with a hammer or you kid stuck the key in an AC socket. They should be very robust, they have to be. Anyhow...... Because of the symptoms, I keep thinking this is an bad connection problem somewhere. Solid state circuitry either works or it doesn't. There may be an intermittent problem because of a bad solder joint that will die but by themselves, unless hit by a surge, solid state is pretty solid. We have checked as many wiring connections as we can find and all seems to be tight. About the only thing left is the ECU itself. I just don't know what else to look for. Maybe the next stop is take it to Ford and pay them $500+ for a simple answer. Anyone have any ideas? Thanks, Richard
The beginning of your problem sounds fuel related (relay, fuel pump, fuel filter). The Ford ECU never goes bad, they are the most reliable on the market. Also ford has a low oil shut down, make sure oil level is correct. Get a OBD II diagnostic test to check for faults stored. When replacing parts start with cheapest first. You were vague on the cranking problem. Not turning over and not cranking are two different problems.
SOURCE: 2005 ford taurus. Remote entry wont work theft light keeps blinking when key is engaged
HI, I'm reading your problem,
Let me explain something about your car.
2005 Ford Taurus, The key on that car has Chip inside of the key and receiver on the ignition switch,
Check if the key you are trying to use is Black and has a plastic head.
If not you need a key with that characteristics.
But if you have the right key, Remenber if you had drop on the floor, or hit with something,
Because some times they come damaged, with insignificat thins.
Remenber if you left the key close to a magnets like speakers.
If nothing aply at your case, you need to call a place Aloha Smith, they have the computer to program or reprogarm your key. IF not you can't start your car.
OK.. I hope this information work for you.
Thank's for submit yous question on fixya.com
SOURCE: 1996 ford explorer anti theft system
Yes I agree it's the 'smart key'. Normally when you buy an explorer new, you will get 3 keys. 1 of the keys is a valet key.
If you were to copy another key that has a smart chip (transponder) in it, the new key won't work until you 'program' the third (new) key. To program it you need the original 2 keys that work.
The only other thing could be that there was a remote start in the vehicle and there could be something wrong with the module that bypasses the transponder. If there is a remote start in the vehicle you might be lucky to some extent if it still works.
If you move the shifter hard and it worked before, like you said, there could also be damage to the wires that goto the key cylinder, the reciever for the transponder in the key. Try having someone hold the key in start and use the tilt wheel, that too will tell you theres damaged wires if it starts.
Unfortunately you probably will have to bring the vehicle to a ford dealer to get additional keys programmed or the damaged part replaced.
It shouldn't cost too, too much. Just be glad you don't have a Saab, replacement key's are $145 Ea!
If your inclined, you can dissassemble the plastic shroud around the steering column and look for damaged wires coming from the black ring around the key down the the connector under the dash.
SOURCE: anti theft system
The chip is in the key. Either the key has lost it's program or the transceiver is not recognising the key. Try another key if you have one.
SOURCE: Ford F150 remote key does not work after car battery
Should not have happened,
For the Factory RKE ( Remote Keyless Entry ) have you tried reprogramming the key fobs to your truck. The procedure is in the owners manual ( need all of them at programming time ).
This is stored in NVR, and should not need to be done, but worth a try.
If this is an aftermarket Remote start / alarm, check the owners manual for t on battery replacement. Have seen some off brand with strange battery ( truck's battery that is ) replacement steps.
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