Hey guys, I have a 95 sohc neon that I'm having an issue with. It's starts right up and idles great but when I'm in any gear it runs rough and won't keep steady rpms. Only time it does great it when I'm using almost to full throttle. It is a dirt track racecar so it is under full throttle alot. But under cautions I cant keep a steady speed, unless I use alot of brakes an put the peddle down pretty hard. Also when I'm rolling through the pits it will go from normal idle and just to 2500-3000 for like 10 seconds then go back. On top of all that, I keep having an issue of it like hitting a wall at 5200 rpms. Just won't go any further. It will in neutral though. I'm stumped.

Thanks in advance!