mzmtg

iTrader: (11)

Gosh the things I do for you people. Ok, in no way do I condone breaking any laws. I figured out how to get rid of the speed limiter on the 4th gen. Cheston & Nick, would you mind putting this in your how-to sections??

Now for the write up:

________________________________

4th Gen Maxima Speed Limiter Removal

The ECU monitors the transmission mounted speed sensor to determine vehicle speed. When the vehicle speed limit is reached, the ECU cuts the fuel flow to the engine to slow the car.

The signal path for the vehicle speed sensor is as follows:

Sensor to Speedometer
Speedometer to ECU & Cruise Control

If the signal is interupted at the actual connection to the ECU, speedometer, odometer and cruise control functions are preserved. The ECU does not recieve a vehicle speed signal, therefore it will not limit the vehicle speed.

This modification is easy. But beware, it does include mutilation of the factory ECU wiring harness...not for the sqeamish.

1.Disconnect negative battery terminal.
2.remove ECU cover from passenger side footwell.
3.Loosen bolt in center of main ECU connector.
4.Unplug main ECU connector.
5.Remove snap-on plastic cover from ECU connector.
6.Locate PINK wire with BLUE stripe. (this wire is located on the right half of the connector when plugged in)
7.Cut PINK/BLUE wire.
8.Reassemble ECU connection.
9.Reconnect negative battery terminal.
10.Drive 140mph.

This modification will cause the "check engine" light to illuminate. If you check the codes, you will get 0104 (Vehicle speed sensor fault) and 0504 (A/T conrtrol unit fault). So far there have been no drivability problems
associated with this mod.

Enjoy.


::stands up to accept accolades from max drivers around the world::

Sprint

iTrader: (10)

I actually did that with a switch.. but i was being selfish .. Haynes Manual Chapter 12

mzmtg

iTrader: (11)

Well damn.

Sprint

iTrader: (10)

well i wasn't being selfish to a sense..

i thought everyone was going to be happy with this http://www.performanceix.com/how-to/...ma_limiter.asp

but still.. nice work Ben...

Whitemax

Well, I say, GOOD JOB!!!! Sounds good, plus the speedo will still work. did the check engine light go away?

mzmtg

iTrader: (11)

Well, that was my point. Using this new method, the speedo still works. This is more of a permanent thing. Well, it's permanent for those of us who drive around with the check engine light on all the time anyway.

I reset the light and drove around some more and it hasnt come on again. It might, it might not.

Ryan93SE

iTrader: (1)

hope this one doesnt catch fire......just kidding Ben
good job...i wish i could think of these things

Sprint

iTrader: (10)

the reason i used the switch on the ECU is that i can trip it for a couple secs.. but not long enough to trip the CE Light

mzmtg

iTrader: (11)

So your is on the ECU or the tranny? I was thinking of doing exactly that, putting a switch in at the ECU end of the thing.

Sprint

iTrader: (10)

ECU

mtrai760

iTrader: (19)

Hmmm.... a free go faster mod... Thanks!...

Now the Mustangs won't pass me after I hit my limiter

mzmtg

iTrader: (11)

After a little more study of wiring diagrams...

I think this will disable the cruise control on 97-99 models. This has to do with the way they integrated the circuitry for the instrument cluster in those years.

Sprint

iTrader: (10)

more reason to put a switch on that baby and use it at will... another note Ben... i know you did specify that the right hand side is where the blue wire is.. but on the left hand side is also a blue/pink wire.. make sure you get the idiots to know .. by telling them its near the two white wires and the black wire...

mzmtg

iTrader: (11)

I wasnt paying that close attention. There is only one PINK wire with a BLUE stripe on there. I went in a wrote it up a while after I did it. I'll look at it later, unless someone else wants to go make sure I got the side right...

Sprint

iTrader: (10)

no you are right.. its on the right side... i figure this out because when i read my manual and it said pink and blue wire.. my cousin was under the panel with the soildering iron and i said cut the pink/blue wire.. and he said which pink/blue wire.. and i said.. their is only one damn wire so cut it and stop arguing.. and he said.. no two.. and looked and yup.. one on the left and one on the right.. but you are accurate with the right side.. just that these guys might get over anxious see the left side and cut it.. and i forgot what that one does.. but cutting random wires on the ECU can't be all that good

ejj

iTrader: (5)

Is one pink with a blue stripe and the other blue with a pink stripe I assume?

Sonic

Good job, dude.

mzmtg

iTrader: (11)

Honestly, I dont know. I just went right for the PINK with BLUE stripe.

Also, the cruise control still works on my car, I used it on the way to work this morning.

Another point, in the manual, and according to Mr. Martin, the ECU uses the speed signal for other purposes be sides cruise and speed limiting. I was just wondering if anyone knows exactly why the ECU needs to know the vehicle speed for air/fuel or load calculations?

Sprint

iTrader: (10)

usually the engine would need to know the RPM or the Speed to determine how much AIR and FUEL to mix.. but the ECU is getting signals from the 2 front O2 Sensors, the RPM signal and the Throttle Position Sensor.. so i don't see why the ECU would need the Speed sensor to mix air and fuel with all the info its already getting

Sprint

iTrader: (10)

i don't know.. but one is on the left hand side of the screw and the other is on the right hand side of the screw..

you want the one onthe right hand side of the screw.. it should be near two white wires and a big black wire

ejj

iTrader: (5)

Good enough. Thanks.

mzmtg

iTrader: (11)

Dont forget the MAF and the IAT. I dont think vehicle speed would have anything to do with engine management. Surely for the tranny, though.

Sprint

iTrader: (10)

IAT? is that an Auto tranny thing? i don't have one of those

CharlieT

Gotta say great job well done
Luckily I got no speed limiter but I will try this on my friend MAx.
PS: I have passed 130 on my max already...Yeee Ha!!!

mzmtg

iTrader: (11)

IAT = Intake Air Temp....you should have one

Sprint

iTrader: (10)

MaximaRider

iTrader: (3)

i thought i spent a lot of time thinking about **** on my car but i was underestimated.

mzmtg

iTrader: (11)

...you have no idea...

krosenb

Hey SprintMax,

What do you mean you did the ECU fuel cutoff change change with a switch? How did you do it exactly. I.e. step by step. Were did the switch go? What were the pros and cons? - Thanks Kevin

Synki

Thanks Bens & Sprnt. I wonder what are the long term effects. Plus i would liek to keep my cruise control.

Ben, has the CE light pop back on yet? How long has it been?

Maybe ill jsut go and get the apexi unit.

mzmtg

iTrader: (11)

Yeah, if you leave the signal disconnected, the CE will eventually come back on. I've since wired in a switch so I can use it for a quick blast and then go back to normal. My cruise control works just fine


Man, you went way back to dig up this thread...

Sprint

iTrader: (10)

Ben Explain the switch to the guy before.. my brain hurts

Will Max

bump

Nealoc187

iTrader: (23)

Why bump?

zmax

i have a 99max se 5spd and i have not hit any speed limiter and i have buried the speedo past 140.

Nealoc187

iTrader: (23)

That would be because SEs don't have governors. This mod only applies to some GXEs.

BrianV

iTrader: (9)

If I do this on my car will it remove the cruise control limit of 90MPH????

Sprint

iTrader: (10)

don't know.. never tried to go above 90 mph on cruise

mzmtg

iTrader: (11)

Very good question!!!

I'll try it today when I head home for lunch. Man, you people are smart.

Fish254

i never went over 120 some thing on my max