I have a 1992 GS, with just below 149k. She usually runs at 900 RPM, but a few days ago it fell below that and the car died, but lights stayed on. I just couldn't start the car again for a few minutes. Halfway home the same thing happened and I died in traffic. After a few more minutes of waiting she started up again and made it home by constantly accelerating so the RPM wouldn't fall, we changed the fuel filter and he battery and my problem seems to be fixed but there is a slight misfire and she idles at 800 now. I plan on replacing spark plugs, main relay if bad, distributor and anything else I find may be causing it.