O.K here is the problem, the car is not throwing any codes and drives fine around town. But under WOT it bucks bad. I thought I was just spinning and hooking on the street but I took it to the track and the first pass I was down 10mph. Fuel and oil pressure is consistent and everthing looked good. So I made one more pass, which was .3 faster and 2mph faster. These are the original 02's from 99 in the car. I was thinking that they are fouled out and that after I did a WOT blast to clean them out some that is why the car went faster. Also I am running leaded racing fuel. Opinions?

 

I'd say that's your problem right there.

Why are you running leaded racing fuel? What is your setup? If it's what's in your sig, why are you running racing fuel for a heads/cam car?

 

More timing, it has slightly higher compression 11.8-1 and it's .60 a gallon cheaper than 100oct unleaded.