frankg <fg11@earthlink.net> wrote in message news:<0jdgov08qfm43hbkvi1a8n5jb6aiil7hfh@4ax.com>. ..
> I'm noticing the "S" light indicator going on and off erratically (not
> steadily) at times on my 91 Accord (automatic transmission). Usually
> it will go on in the beginning of a trip and then usually go out and
> stay out for the remainder of a short trip. I did notice it shift
> differently when the light was on as opposed to off today. Also I've
> been noticing a slightly louder engine rpm's than normal for weeks
> thinking it was an exhaust leak till now. Assuming this all is a
> transmission problem, who is best to diagnose this (Honda dealer
> service dept as opposed to others). I'm not sure I can replicate the
> problem ( "S" light indicator) on cue for any shop when needed to.
>
> Any idea what transmission work costs today??
>
> Any ideas how best to approach this? I don't want to ignor it.


There are two likely possibilities:

ONE: The signal wire from your sport-shift button or the switch
itself is intermittantly grounding somewhere, causing the computer to
erratically change back and forth from sport mode.

TWO: Honda had a transaxle computer update for that exact problem on
that bodystyle Accord; it went into effect in the early to mid 90s. A
bad computer could cause the S light to turn on for no reason. The
actual shifting sometimes was effected, other times not.

Who to trust?
Keep in mind, Honda doesn't owe you a free repair on a 1991 vehicle,
but I guarantee an independent shop won't offer a fix for free! The
dealer should be aware of the problem, but they will probably charge
you to check it out even if you mention that you are aware of the
computer issue. After all, your car is way out of warrantee. This
leads me to suggest you go to the dealer. If you can spare the car
for a few days, let their technician start it every morning until the
S light acts up for him. Then the tech will know from experience if
it is a common computer problem or something more involved.

Just keep in mind, if someone tells you you need a trans overhaul, get
a second opinion!