top speed limiter removal...

i just want to make sure this is the correct procedure... if someone could verify this for me?
on the computer, cut the yellow wire with the green stripe... its the 8th wire over from the right on the harness #32 on the computer?

cant clarify that for you, what i would do is just cut the 5th gear sensor on the tranny down there

hmm sounds like it would work... i just want to make sure that this will work first because i dont want to go under the car to do this unless this method definatly doesnt work... thanks

just unplug the 4th gear and 5th gear sensor on the tranny.

doesnt unplugging the 4th and 5th gear sensors on the tranny disconnect the rev limiter??

i'm listening.... i hate my revlimiter!!

cutting the wire will only allow you to go about 120. the rpm limiter in fifth gear is around 5000. The fuel cut is a nasty thing for the engine.

just unplug the 4th gear and 5th gear sensor on the tranny.

Does that work and does the tach still work? oh and why do you need to disconnect fourth?

you dont have to it just let you wind out 4th more your tach should still work but your speedometer wont so youll have to wire up a switch if you want that to work.

every1 is sayin cut this and unplug that.. has any1 tried this on their own car an know that this works and doesn't cuz any long term damage to anything? cuz i mean i wanna try it too but i'm scared to cut anything then i gotta put out money to fix it

Why don't you guys just buy the speed cut and rev cut from hks? Save you guys the hassle of cutting up all your wires, and having a headache later. Do it right the first time.

i removed mine about a year ago all i did was splice one little wire, and wire it to my pop headlight switch so i can turn it on and off when ever i want no problems, no regrets, NO MONEY,NO REV LIMIT

this is my post from about a month or so ago heres the procedure from 240sx.org I actually just completed the task last week.It's not too difficult to do yourself as long as you have the ability toramp or lift the front of your car up enough to get to the transmission. Here's the procedure. First you must disconnect two sensors (presumably RPM limiters?) from the tranny. One is the fourth gear sensor, while the other is the fifth gear sensor. If you look at the transmission under the car there are supposedly four (4) sensors (I only saw three, but the fourth one is somewhere under there), the ones that need to be disconnected are the middle two (2). The electrical connections are simple snap lock configured so not cutting is required. Once the two connections are disconnected, I recommend you thoroughly tape over the ends of the connectors to prevent moisture from entering within.

By doing this step the ECU doesn't know your 4th or 5th gear RPMs, therefore it won't limit you. Note: If you have faith in placing your car on jack stands (some members have done this) you can test the limiter for each gear before and after each step. What you'll find is that the ECU limits the top end RPM for 4th and 5th gear before you disconnect anything. Afterwards, the skies the limit.

The last step is to disconnect a control wire that comes from the tranny area and passes by the passenger side of the starter in the engine compartment. You'll find another simple electrical connection (looks like a tube style fuse holder) with small gauge wire. Unhook this connection and then drive your car and you'll notice the speedometer doesn't work, nor do the number onyour odometer change. What you've disconnected is the sensor that transmits the speed to the ECU and the display. Now the computer tries to watch your speed to make sure you don't go past 115mph (S13 model, S14 may vary higher), but never cuts off your fuel since it doesn't have a clue how fast you're traveling.

Since most of us don't cruise over 115mph you may want to wire a switch into the speedo connection just mentioned. I used a simple red rocker switch and installed it into the blank Nissan console plate located to the right of my
rear window washer/wiper control buttons.
now you dont have to install a new switch i just wired it to the head light pop up switch cause i didnt ever use this button

i removed mine about a year ago all i did was splice one little wire, and wire it to my pop headlight switch so i can turn it on and off when ever i want no problems, no regrets, NO MONEY,NO REV LIMIT

Which wire did you splice and does your speedo and tach still work?

*EDIT* Never mind. I understand what you did now. Thanks. I'm looking for a way to get rid of the fuel cut and have the speedo and tach work.

yeah thats what i was wondering

no rpm at 4th and 5th??? huh... not tanxs! i rather get the HKS one!

the only thing your doing by unpluging those sensors is cutting the info to the ecu to keep it from cutting the gas off right ?

no rpm at 4th and 5th??? huh... not tanxs! i rather get the HKS one!

I went to www.hksusa.com today and apparently you have to get a unit for the speed cut (cutting the green and yellow wire works just fine) and for the fuel cut. They are both like 125 or so.

alright well thanks guys... id say its time to test this out, and if it works, ill post. its only one wire im cutting, and if it doesnt work then i can always re-splice it...

$125 geeeeh, ynxa anyways nissanfanatic! good looking out!

tnxs that what i was trying to type "typo" douh!!

On my 91 it was the green/white stripe wire but I guess it varies from on generation to the next. Cutting the wire ate the ECU is a better idea than the wire at the gearbox...1 because your work is just in the car's interior; 2 because I've heard of road racers doing it that way and loosing the engine in the gears of the wire they cut (no engine damage, it just shuts off in those gears with the cut wire). The 2nd aspect of this may not be true in all models but it is for some.

But when you cut the speed wire, it only lets you go to about 120. The computer still limits the rpms at about 5k with a fuel cut.

just get an auto ecu and have no speedlimiter and the rev limit in 5th gear will be 6k like the rest of the gears.

But when you cut the speed wire, it only lets you go to about 120. The computer still limits the rpms at about 5k with a fuel cut.


thats why you have to unplug the 5th gear sensor on the tranny

i removed mine about a year ago all i did was splice one little wire, and wire it to my pop headlight switch so i can turn it on and off when ever i want no problems, no regrets, NO MONEY,NO REV LIMIT, NO FUEL CUTOFF :banghead: like i posted in about four diff forums on this subject mine works fine i just push the button i have mine wired to when it is about to reach the cut off point and it keeps going and going and going

was that green/white stripe wire on a 240 with the ka24e ecu or are all the ecu's the same wire u gotta cut? and how do u wire it up to ur pop up headlights?

im not for sure on the color dont remember but all i did was take some extra wire and conect them to both ends of the wire you cut and run it up beside the shift knob up under the dash and across to the switch. now you will have to disconnect the harness from the switch and take a short wire(about an inch) and cross it between two ef the connecters inside the harness cause the headlights will not pop up unless a connection is made you will have to play with it a little bit to figure out which ones they are just connect two and turn on you lights till the headlights work properly. then do the same with the wire you ran up from tranny you will have to play with this to just plug one wire in and go for a drive on a road with little traffic go slow and plug the other end in diff spots also pushing the button until your speedo drops to zero. your tach should still work, mine does maybe magic cause most people say theres dosent hope this helps some.

Just Buy And Auto Ecu.....!

No Wire Cutting, No Hassel, Just Satisfaction.

stop making musicsurfman repeat himself

spend money........ or dont spend extra money........save money for something worth the cost...........or waste it on something you can do yourself. look i really dont care what anyone does just trying to help someone out with a question they had(i thought that was one of the reasons this forum existed)my bad not everyone is loaded and can afford to blow money :sorry:

a auto ecu will cost you $20.... or less from someone who is swapping out their motor. Hell I had two I gave away.

so the auto ECU will work??? the pin outs are the same??? i guess i could see how it would work....the pinou-ts for teh auto tranny will go into the connectors where there is no wire located(is that correct??)

and i am not sure what the switch does, but what i am getting is that it pretty much just "turns off" the spedometer (so u dont no how fast ur going ) and that stops the car from knowing ur speed??? and u dont have to unplug the tranny sensors???

and one more thing.....lol.......will a ECU from a 89 auto work in my 92??? cause if it will i can get one for free :D

No, The Ka24e Is Totally Different Than The Ka24de.
Yes, The Auto Ecu Will Plug Right In And It Will Have No Wires For The Auto Tranny Controls Which Wont Matter Anyway.

ok, thanx, i didnt think the E and DE would match up, but i thought i would try anyway hehehe.

well, i guess instead of Dropping the $75 on the GReddy speed cut ill get me a Auto ECU :D