What's wrong?
 

Hey everyone, I'm new to LS1tech so I thought I would introduce myself. My name is Kevin I have a 97' Trans Am with a few mods. Can you guys help me out by telling me what you think might be wrong with my dyno graph. It seems to be fine til about 4700RPMs and up...

www.fbodypages.com/kevin/After Tuning.jpg

Thanks

Kevin

looks like a misfire. A miss up that high... I'd guess opti. What mods have you done?

detonation or bad fuel curve. check your fuel trims and AF/ratio. I wouldnt guess an opti because its only happening in high rpms....ignition problems, 99 percent of the time, show throughout the entire dyno or atleast when the motor is under a load, not just in the higher RPM's.

Sorry I forgot to put my mods in my sig. Could possibly bad o2's cause this, or would bad o2's also be apparent in the whole RPM range?

I think I just read that O2's are ignored during WOT. Hell, I don't know, I should have bought a carb!