I bought a 760 Turbo with 150,000 miles on it and it has been more of a project that I would have liked and now I need some advice. When the car is idleing, it occassionally studders but does not die like it did before I did an ignition tune up. The car still feels like its missing a lot of power. It will not glide up to redline like I imagined it would. I cannot decide if it is a transmission problem or an engine problem. I am getting about 13.5 miles to the gallon and the car seems to have trouble getting up to redline after 3000 rpms. I think that either the torque converter is not locking up, or the engine isn't making a lot of power.

I think it might be a transmission problem because of various other transmission problems I have. I tried to flush the transmission fluid to get it back to the red color is supposed to be but it will not get out of the light pink color. I don't know why that is. The transmission cooler was broken in radiator when I bought the car but I promptly changed out the radiator, flushed the cooling system and flushed the transmission about 6 times. When i start to drive the car in the morning, the car gets stuck in first gear until i have been driving for a couple of minutes.

I have put new plugs, wires, distributor cap, rotor, and fuel injectors into the car. I also cleaned out the intake manifold and throttle body.

Does anyone have any idea what my problem could be?