4th and 5th gear speed sensor.

On the Dash plug ( the thing that connects the gauge cluster to the ECU ) there is a wire that needs to be cut. Or interrupted with a switch so you can turn it on and off. I am not positive which one, but who fucking cares anyway? This isn't the autobahn.

 

i just unplug something from the trans ive never had a problem

 

what about useing a auto trans ecu i heard that works too
nope..the speed arrow just drops to the bottom on the speedometer.. but i can calculate my speed by rpms.

4600rpms = 115mph (on s13)
5800rpms ~ 145mph (thats my top speed that i achieved)

THIS SHOUD BE DONE ON YOUR OWN RISK.
TESTED AND APPROVED FOR 1991 - 1994 240sx. but it should be the same for all models of 240sx and 180sx.


ok, here is the trick. (i think i should make a profit out of this, lol)

1. locate the speed sensor on your tranny. its not like all other 4 sensors that go in your tranny. its much bigger then others, and its round.
2. follow the wires from the sensor... they go in the engine bay
3. as soon as the wire reached the engine compartment, the wires endup in plug that plugs in other plug.


now you can choose wat you want to do next:

***EASY WAY*** (not recommended though) - speed will never show, miles never go up, no speed governors.

4. Dont cut anything. just follow the wires from the speed sensor that go in a connector and unplug it. (look at diagram) and if you do, make sure the wires that are unpluged dont touch the ground.
= the speed will not show unless you connect the plug back.



***HARD WAY*** - as soon as you go over 110 mph or at any speed, you can turn off the switch, and then you speed dies, and governor. very usefull. thats the mod i got. lots of wireing. speed will show and governor will be active unless you turn the switch off.

4. there are 2 wires coming from the speed sensor. i think its green and black. but it doesnt matter.

5. Cut one of the wires (any). so now you have one wire that is uncut, and the other one is cut and has 2 connectors. you should clean the 2 connectors of the plastic surrounding and make it neater.

6.go and buy about 4 - 6 feet of double wire. (2wires that i glued together)

7. take the double wire. ( you sould have 2 wires hanging at one end of the double wire) and connect those 2 wires from the one end to the 2 connectors from the cut wire from the speed sensor. (look at diagram)

8. take the other end of the double wire and somehow manage to take it inside of the car. there should be a whole in the fire wall on the driver side.

9. put an on/off switch at the end of the doublewire that is in the inside of the car.

10. you are done. whenever you turn the switch off, there is a break in the wire, and therefore, there is no electronic circulation, and thats why your speed sensor goes offline, and you can go as fast as you want. turning the switch on, will make the sensor alive, because now there is a electronic circulation.


***VERY IMPORTANT***
on s13 (and i think on any model of 240's).. there is a 5th gear, rev limiter, that does not allow you to push the engine rpms more than 5000 in 5th gear! if you turn the switch off, and reach the 5OOO rpms line in 5th gear, (approx. ~ 128mph) you will not go anyfaster.

BUT, that will not stop us from reaching top speeds. there is a way to bypass that too. here is how:

all you have to do, is go under the car again, there should be 4 sensors other then the speed sensor. Unplug the 2, and 3 sensor that stick out from the transmission.(look at diagram) one of them is the 5th gear sensor. that sensor tells the computer that you are in the 5th gear, and therefore, the computer limits the rpms to 5000. try to unplug both, because i am not sure which one exactly is the 5th gear sensor out of those 2.

TEST IT FIRST:
after you unpluged both, try it out. start the car, pull the EBrake! put in the 5th gear (DONT release the clutch!!!) and rev it up all the way...

if the rpms go higher then 5000, then you did everything correctly.
NOW is the time to take your little 240 for a test drive on the highway. I find it better to speed in the mornings (like 10 am) thats when theres not too many cars.



TROUBLESHOOT
if the rpms stop at 5000 (you will hear it), disconnect all 4 sensors from the tranny. because the 5th gear sensor might be alocated (moved to a different spot).. but if you disconnect all 4.. that should do the work. MAKE SURE YOU DONT disconnent the speed sensor from the tranny. (you check engine light will not go on. at least not on S13's)

this is from club240.com

 

Or you can get a real car that doesnt have a limiter?

 

which car comes without one? even the bugatti veryon comes with one, and it does 250+mph.

 

no need for high speeds on public roads

 

haha my prelude doesnt have a limiter!

 

but for JDM WANGAN racing yes!!

just get a ROM tune done at XAT, it takes it off

 

if you have a 5 speed... simply get an ecu out of an automatic and swap it in..... it works fine and there are no side effects. trust me easiest and cheapest way

 

I 2nd this did this on my old 240 worked like a charm.