the car doesnt miss, it just flattens out at higher rpms. could the brake cleaner be fooling a sensor? if so, which one? i dont understand this. just for kicks i sprayed some more brake cleaner into the throttle body and once again it ran hard and fast for about 15 minutes. a few days ago i was cleaning out the throttle body with some brake cleaner, when i got it back together and took it for a drive it got up to 6,000 rpms fast and ran fast. the timming is exactly were it should be(10 degrees btdc) i replaced the spark plugs with new motorcraft plugs, wires, cap, rotor, throttle possition sensor, all new high flow exhaust, air filter, tested fuel pressure and replaced filter, plus a few more things too. i have checked for trouble codes and there are not any. it will still get to 5,500-6,000 rpms it just takes a lot longer than it should. it pulls hard untill about 3,500 rpms and then it just seems to flatten out.

the car runs well but lacks mid to upper power. i have a 88 turbo coupe 2.3 liter turbo/5 speed. Im new here so let me start off by saying hello.

88 tbird turbo coupe