97 Vette is missing and running rich, help!

[Shawn84&92]

I was driving the other day and went to take off from a stoplight, and it ran terrible. After driving about 40 min. it set code 1133, which is the front HO2 sensor. I replaced it and the car still runs very rich. It has heads and cam 45k miles, 10k on heads and cam. The plugs are original. Any ideas?

thanks,
Shawn

 

[Vettelt193]

it could be getting a bad signal from the MAF, causing the car to think it is getting more air than it actually is.

 

[TODD L GRIFFITH]

Running rich

Vettelt193 could be right. Maybe your problem is your computer program. When adding heads and a cam, reprogramming the PCM is also something you should do, if you haven't already. The stock program cannot run with those mods. You don't want to ruin your catylitic converters either left undone.