got a 89 z24, I love the car... but im ready to put it in a field and see how many pieces I can blow it into, the engine will start to choke out like its not getting air at between 2500~3k rpms in which the car will continue running but will not accelerate. This happens in 1,2 and 3rd gear, can not reach 4th. Main issue is that this makes it so my top speed is about 40 and it takes me almost 1/2 mile to reach 40. I have checked the ecm, and had the vacum lines checked, I believe it is a power issue because if I hit my hazards as I am driving and nearing the "kill point" on my tach the car will jump everytime the hazards blink. I have also replaced the fuel relay and fuel filter and I dont believe its just crap in the tank because it will do it regardless of how much gas is in the tank. I have also run enough injection/engine cleaner through it in the last 2 months to sinks a fleet of battle ships. If anyone can help me I would apprieciate it, I work on cars with 2 mechanics and have taken it to 3 shops and NO one has been able to solve this, any sggestiong are welcome.