1997 ford expedition help

[Richard Orsot]

I have a 97 Ford Expedition I got it after 7 or 3 years put a new fuel pump in it put new alternator on it fired right up ran for 2 days with no problems I drove across town once I want to go back to the house turkey and the theft light blinking replace the keyring electronics for the immobilizer and still nothing have the original key and the ones without a chip can't get it to start still just theft light blinking

 

[riphip]

Welcome Richard!!

My light blinks all the time, no problems. Don't know about the 1997, thought they all blinked in same fashion as a warning to would be, wannabe thieves.

From my Service DVD:

'All elements of PATS must be functional before the engine is allowed to start. If any of the components are not working correctly, the vehicle will not start.

PATS uses a visual theft indicator. This indicator will prove out for three seconds when the ignition switch is turned to RUN or START under normal operation. If there is a PATS problem, this indicator will either flash rapidly or glow steadily (for more than three seconds) when the ignition switch is turned to RUN or START. PATS also "blips" the theft indicator every two seconds at ignition OFF to act as a visual theft deterrent.

The PATS is not compatible with aftermarket remote start systems, which allow the vehicle to be started from outside the vehicle. These systems may reduce the vehicle security level, and also may cause no-start issues. Remote start systems must be removed before investigation of PATS-related no-start issues.'