I NEED HELP WITH 1995 LESABRE WITH 3.8L V-6. VEHICLE STARTS AND STALLS AND SECURITY LIGHT COMES ON THE DASHBOARD. CHECKED FOR CODES: ONE CODE FOR KEY"PATS" NOT RECOGNIZED;MEASSURED KEY CHIP RESISTANCE 470 OHMS-OK;FOUND WORN KEY;I REPLACED IGNNITION KEY AND IGN. SWITCH AND IGN. SWITCH WIRING HARNESS. VEHICLE WASOK FOR FEW WEEKS AND THEN SAME SYMPTOMS:STARTS AND STALLS. THIS VEHICLE IS OBDII SO I CHECKED FOR CODES AGAIN USING SNAP ON SCANNER AND THEN GM TECH II SCANNER. I GOT SAME CODE FOR IGN KEY MALFUNCTION;MEASSURED KEY RESISTANCE AGAIN-OK; I USED WIRING DIAGRAM TO TRACE WIRING AND CHK RESISTANCE BETWEEN IGNITION SWITCH AND PATS MODULE(R/F BEHIND GLOVE BOX) AND PATS MODUL AND ECU: ALL WIRING WAS FINE AND THEN I REPLACED PATS MODULE AS WELL; CAR WAS OK FOR FEW WEEKS AND THEN AGAIN STARTED ACTING UP;FRIEND OF MINE TOLD ME THAT "PARK NEUTRAL SAFETY SWITCH" MAY HAVE SOMETHING TO DO WITH IT BUT AFTER INSTALLING NEW ONE STILL CAR WAS STALLING. ONE THING I NOTICED THAT DURING COLD WEATHER AND SNOW THERE WAS NO PROBLEM AT ALL AND NOW SINCE IT IS WARM OUTSIDE HERE IN NJ CAR STARTS AND STALLS AGAIN. AFTER SO MANY NEW PARTS INSTALLEDAND SO MUCH TIME WASTED I'M CLUELESS SO IF SOMEBODY HAD A SAME PROBLEM PLEASE HELP ME.

I think you can put the key in the ignition and turn it to run and wait till the security light goes out before cranking. I believe about 5 minutes. Crank the car and see if things are normal.

If you have problems still, you may be loosing power voltages from a bad ground or battery or such.

Have you determined when the car stalls it is from the Key system?

Does it loose ignition or fuel injector pulses? I think the security system turns off the injector pulses.




Edited by: bassasasin

THANK YOU; I WILL CHECK INJECTOR PULSE AND I LET YOU KNOW WHAT I CAME UP WITH. THANKS AGAIN.