Hi i have posted before about the warning and odo lights coming on on the dash board on my NA jap import when going over 80mph and the odo flashing on and off. And i have tried everything to cure this problem with no luck i have had three different speed converters on and the problem still persisted. Well my car has not been running very well since the last service and timing belt change, and it would not idle properly and kept hunting and had a flat spot when trying to pull away quickly. The main problem was the bloody warning lights coming on at speed or high rev range.
Well i booked the car into Toyota for a diagnostic check, it came back that the timing was out and a conversion sensor needed to be reset and reset distributor timing, the work was carried out and now the car drives like it should and the warning lights are no longer coming on.
So i know a few NA owners have this problem i would suggest going to your local Toyota dealer and having this done and hopefully it will work for you.
The warning light problem was driving me mad as i can't just ignore this sort of thing, and i was not enjoying driving my supra. But early tomorrow morning i am going out and giving it a good blast, be fore all the Sunday drivers get out and clog the roads up.
A big thank you to every member who gave me advice on every post, it was always a great help to someone who is not mechanically minded, this is a great club to belong too.