whontime

Ok, I posted my dyno graphs on Friday along with my results. The dyno graph showed a fall off around 5,000 rpm with zig zagging. I had been noticing that the car hadn't been "feeling" right between 2,000-3,000 rpm under light/normal accleration. When going at WOT the car feels great and pulls strong all the way to the rev limiter. I cannot feel any fall off in power or and surging/miss. The car idles perfectly and runs fine. Here is where my question comes in.... What should I do about this? Should I try to find this problem or just not worry about it for now? Like I stated, the car runs and pulls great, but the dyno graph shows a problem. I feel like it is probably ignition related, but I don't want to go replacing parts without knowing the problem. I figure that I will know soon enough if the opti is going bad or any other part of the ignition for that matter, when the part just stops working. I am ready to put headers on and do a cam swap in the very near future. Should I go ahead with my plans or not? Also, I was considering getting a Scanmaster anyway, would it help in locating this problem? Thanks in advance.

Pull #1 274.4hp, 314.4 torque
http://www.villagephotos.com/viewpub...sp?id_=5489550
Pull #2 274.2hp, 313 torque
http://www.villagephotos.com/viewpub...sp?id_=5489585
Pull #3 274.4hp, 314.4 torque
http://www.villagephotos.com/viewpub...sp?id_=5489617
This last graph show the A/F ratio which showed a little lean, but I find that hard to believe considering my mods.
http://www.villagephotos.com/viewpub...sp?id_=5489659

I got some thoughts from others when I posted my dyno pulls on Friday, but I need some more opinions on this. Thanks.

EDIT: Here are my mods: Moroso CAI, Gutted Cat, Flowmaster Muffler. I also have removed the MAF screen and I have the Nitrous Works Plate system on my car(I seldom use it). Think the plate could cause any of this?

Josh-'04 GTO

Your links don't work. If the graph is very choppy, then you probably do have an ignition malady. This happened to me recently, and rather than mess around, I took the "war hammer" approach. I swapped out the opti, coil, plugs, and wires with brand new components. That seemed to do the trick, but if you're a little short on cash, then you'll have to try harder than I did to narrow it down.

whontime

The links should be working now, villagephotos is pretty crappy at times. I don't have a problem with spending the money to fix the problem, but..... The opti has less than 20,000 miles on it and I just changed the plugs and wires recently. Hopefully the links are working now..

whontime

TTT. I would really like some thoughts on this. The links to the graphs should be working now.

RedPhenx

if you dont think it's ignition could be springs or something floating? going out on a limb there, but it def does sound more elec, ignition related that mechanical, i would replace it or fix the problem, since if you dont it may mess something else up in the future