How do you get to the speed sensor on a 1990 honda prelude?

SOURCE: battery light staying on and loses power going up

How long has this been happening? Your battery light stays on when you have a charging problem.

SOURCE: speed sensor problem

for the engine reving thats your fast idle control valve. which is location between your intake and firewall to the left of the "programmed fuel injection" stamp/emblem/sticker thing. it should have a dark tanish top on it with two phillips head screws on opposite sides of each other. when you take the top off you should see a white-sh(depending on how dirty it is, but it should be white) wax ring in there. using a flat head screw driver, screw the wax ring in 'til its tight. then just put the cover back on and that should solve the revving problem. if it doesn't stop then you probably need a new fast idle control valve. if you're still confused go to www.prelude3g.com and click on the "common problems" tab on the top center/right part of the page, then click on the "bouncy idle" link and it should explain a bunch of other issues that may contribute to the revving problem and has pictures of where the fast idle control valve is. the site also a bunch of other stuff that has helped me with my lude. as for the other stuff you're having problems with, the guy above me said the same thing i would have. anyway, i hope this all helps! :)

SOURCE: where is the selinoid located (cyllinoid?) in a

The solenoid is on or in the starter depending on if the car has a mitsuba or a nippondeso starter.The mitsuba has to be replaced,the nippo can be repaired with a new set of contacts and a plunger.They are both located on the passenger side and can be found by following the positive cable to the starter.

SOURCE: Torque specs for head bolts, 1990 Honda prelude si

49lbs I believe but it should tell you in the manual or goto a Kragen store and just flip thru a Haydem or Chilton repair book real quick.

SOURCE: where is the transmission dipstick on a 1990

I only know about the dipstick for the automatic transmission.
It is located to the passenger side of center and is burried dwon very deep - you almost have to reach full-arms-length down, between hoses and air duct to reach it. It has a wire loop handle usually covered in orange/yellow rubber. All total it is about 6 inches long when removed. It is so hard to find that I thought mine was missing and bought another one before I found it.