Bgladfelter

ok, 89 CRX Si with a ZC motor and Teg ECU. Leaving my friends house on our way to the track and after a stop I punched it. Great through 1st and second, shut down around 55 and went to third. It acted like it was out of gas or spark. Coasting into a gas station it was flashing 4 and 8. After starting it the light didn't come on, but when I started pullling out I pulled over again and it was just code 4. I got it home. Now heres the thing, can I replace just this sensor or do I have to do the whole assembly? need to know so I can order the part since I'll be out of town tomorrow thru Sunday. Its raining now so I can't test per Helms.

cliff notes: 4 and 8, but only after trying to drive out. Can't do more than 10% throttle. Do I do the whole dist assembly or just the sensor?