I have a 91 Accord LX that I love dearly. The following things seem to have happened around the same time:

1. The sport light on the dash starts flashing shortly after I start driving the car.
2. The speedometer works only intermittently.
3. The check engine light sometimes comes on now.
4. Sometimes, it is slightly difficult to get the car out of "park."

The transmission seems to shift smooth, but when that sport light starts flashing I can tell that the car won't go into fourth gear. Any ideas what this might be? I'd appreciate any pointers before I take this one in.

 

I haven't quite figured it all out, but my brother and I installed another transmission in his 91lx, and about 2 months later it started doing the same thing. We've tried replacing the gauge cluster, and the speed sensor, but the speedo still does the same thing. As for the difficulty shifting, his will go into fourth, but after about ten minutes, the sport light starts blinking. we're going to try adjusting the tranny cable next.

 

I had the same exact problem with my 91 lx, I took it down to the dealer and theey told me that the speed sensor was bad and needed to be replaced, so they replaced it and the problem was gone. I think it cost about $60 at the time but I don't remember exactly as it was a couple years ago, but I hope this helps at all