car idle problems [Archive] - Toyota MR2 Message Board

fuel, pressure, throttle, problem, 2000, system, mods, idle, throwing, jerry, lies, coolant, jump, wondering, diagnostic, body, bigger, piping, sensor, position, points, code, adjuster, removed, switch, screw, mine, aluminum, pulley, underdrive, springs, flywheel, venom, injectors, pump, valve, cams, problems, bugs, rebuilt, 264-8.1, motor, 4agze, adjustable, regulator, repeatedly, jumps, idles, 2500, sounds

Now I am just trying to fix the bugs. I just rebuilt a 4agze motor with some mods: (HKS 264-8.1 cams, hks valve springs, underdrive pulley kit, aluminum flywheel, venom 10% more fuel pump and injectors, adjustable fuel pressure regulator). I am pushing about 45 psi fuel pressure. The car starts up without a problem but I cant get it to stop idling rough. It fast idles at 2000, then jumps repeatedly from 2000 to 2500. It sounds like I could have an air bubble in my coolant system but b4 I