I have an '87 Stanza that has been giving me trouble off and on during the winter months. Computer testing says the car is fine. When driving after so many minutes (approx. 20) my car wants to stall. The car does not want to go over 2500 rpms, or it will stall. It seems to want to work only when the clutch is in all the way. New comp., new fuel rail assem., spark plugs and wires have all been replaced as well. I don't understand why this happens MOST of the time, not all the time or even at all. I would appreciate it much if I could get some feedback. Thanks.