Ok, as some of you know a while back my car started to mess up horribly.
Here are the cliff notes:
Its a s13 Dohc Ka.
It started when I was going to go to the drag strip one weekend and I put 93 octane fuel with lucas octane booster. This was over 3 months ago so that fuel is long gone.
I do have an exhuast leak
.It only messes up if I go over half-throttle. I Believe it to be something electronic.
.I've basically Replaced just about everything.
.Mods on engine are only Apexi N1 dual, testpipe, and K&N air filter.
.Im using 20w50 Royal purple oil with a K&N filter.
.EGR is removed.
.Fuel Pressure lowers when I give it fuel? Don't believe that's supposed to happen but I could be wrong.

Things I have replaced are : Spark plugs, wires, distributor, dist. cap, dist. rotor, Fuel filter,ecu, Re-did the entire wiring harness twice, changed maf, Coolant temp sensor,Changed oil, changed intake manifolds to the s14 one, replaced tps, fuel injectors, fuel rail, o2 sensor, I've re-timed it like 30 times.. And I've seafoamed it, I think thats about it.

The only way I can explain this is that it basically looses power and hesitates horribly when it happeneds.

And heres the videos, On the first video it happeneds at the end, It runs good for the 1st few runs.
1st video 240 messing up Pictures, 240 messing up Images, 240 messing up Photos, 240 messing up Videos - Video - TinyPic - Free Image Hosting, Photo Sharing & Video Hosting

2nd video 240 gayness Pictures, 240 gayness Images, 240 gayness Photos, 240 gayness Videos - Video - TinyPic - Free Image Hosting, Photo Sharing & Video Hosting Shows Fuel pressure

3rd video 240 messing up 2 Pictures, 240 messing up 2 Images, 240 messing up 2 Photos, 240 messing up 2 Videos - Video - TinyPic - Free Image Hosting, Photo Sharing & Video Hosting Best video of the issue, shows the problem constantly in this.

If you have any Ideas Please let me know. Thanks,Pete.