I have a 1990 Honda Accord with 380,000 km. Lots of Kms, but the car has been very well kept.I have noticed that when I am up to highway speed the car will run about 150 rpm too high. If I touch the gas pedal or come to an incline the rpm will drop to normal. Everything else works fine. Thisis an incredible auto and I want to keep it like that. A friend mentioned lockup converter. And also suggested it might not be anything wrong at all.
I appreciate your thoughts. Best regards.