JWT ecu ?'s
05-28-2003, 06:26 PM
#4
i have a 97 manual, my vehicle speed sensor is not working, i checked the codes and also had nissan take a look and its gone bad. i have hesitated to have it fixed because i can go over the rev limiter now, its like that function is gone. Used to if you reached a certain point in rpms it would shut you down so you just shifted real quick, but now there is limiter on mine. my guess is that my vehicle speed sensor is shot
05-28-2003, 07:44 PM
#5
Originally posted by Ceasars Chariot
i have a 97 manual, my vehicle speed sensor is not working, i checked the codes and also had nissan take a look and its gone bad. i have hesitated to have it fixed because i can go over the rev limiter now, its like that function is gone. Used to if you reached a certain point in rpms it would shut you down so you just shifted real quick, but now there is limiter on mine. my guess is that my vehicle speed sensor is shot
i have a 97 manual, my vehicle speed sensor is not working, i checked the codes and also had nissan take a look and its gone bad. i have hesitated to have it fixed because i can go over the rev limiter now, its like that function is gone. Used to if you reached a certain point in rpms it would shut you down so you just shifted real quick, but now there is limiter on mine. my guess is that my vehicle speed sensor is shot
Wait wait wait... do you mean that you can go over the stock RPM limiter (6550rpms, looks like about 6700 on the tach) or do you mean you can go over the old GOVERNOR at 116mph? If you mean your RPMS are no longer limited then that's a huge thing for guys with MEVI who don't want to drop another $600 on an ecu.
05-28-2003, 08:04 PM
#6
Originally posted by Nealoc187
Wait wait wait... do you mean that you can go over the stock RPM limiter (6550rpms, looks like about 6700 on the tach) or do you mean you can go over the old GOVERNOR at 116mph? If you mean your RPMS are no longer limited then that's a huge thing for guys with MEVI who don't want to drop another $600 on an ecu.
Wait wait wait... do you mean that you can go over the stock RPM limiter (6550rpms, looks like about 6700 on the tach) or do you mean you can go over the old GOVERNOR at 116mph? If you mean your RPMS are no longer limited then that's a huge thing for guys with MEVI who don't want to drop another $600 on an ecu.
jk lol 
yeah thats some serious news for ya'll hoodlums with the mevis! 
05-28-2003, 09:27 PM
#7
Moderator who thinks he is better than us with his I30
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Posts: 9,335
Originally posted by Ceasars Chariot
i have a 97 manual, my vehicle speed sensor is not working, i checked the codes and also had nissan take a look and its gone bad. i have hesitated to have it fixed because i can go over the rev limiter now, its like that function is gone. Used to if you reached a certain point in rpms it would shut you down so you just shifted real quick, but now there is limiter on mine. my guess is that my vehicle speed sensor is shot
i have a 97 manual, my vehicle speed sensor is not working, i checked the codes and also had nissan take a look and its gone bad. i have hesitated to have it fixed because i can go over the rev limiter now, its like that function is gone. Used to if you reached a certain point in rpms it would shut you down so you just shifted real quick, but now there is limiter on mine. my guess is that my vehicle speed sensor is shot
explain your self....
05-28-2003, 10:48 PM
#9
"I'm running with scissors!"
Thread Starter
Join Date: Feb 2003
Posts: 586
Originally posted by nismos14
im guessing that he means you have no rev limit... because he said you have to shift real quick... so everyone... torch your speed sensors and no need for the jwt ecu! lol
im guessing that he means you have no rev limit... because he said you have to shift real quick... so everyone... torch your speed sensors and no need for the jwt ecu! lol
or does the tranny's computer shift it before that would occur
05-28-2003, 10:50 PM
#10
Originally posted by mayhemI30
if you did that on an auto, wouldn't it just keep revving till you blew your motor????
or does the tranny's computer shift it before that would occur
if you did that on an auto, wouldn't it just keep revving till you blew your motor????
or does the tranny's computer shift it before that would occur
05-28-2003, 11:10 PM
#11
"I'm running with scissors!"
Thread Starter
Join Date: Feb 2003
Posts: 586
Originally posted by nismos14
the trannies computer would do the shift, but if u kept in a specific gear on an auto trans, sky's the limit...
the trannies computer would do the shift, but if u kept in a specific gear on an auto trans, sky's the limit...
how hard on motor would it be, could it affect the motors longevity, is it safe.
05-29-2003, 12:01 AM
#12
Originally posted by Ceasars Chariot
i have a 97 manual, my vehicle speed sensor is not working, i checked the codes and also had nissan take a look and its gone bad. i have hesitated to have it fixed because i can go over the rev limiter now, its like that function is gone. Used to if you reached a certain point in rpms it would shut you down so you just shifted real quick, but now there is limiter on mine. my guess is that my vehicle speed sensor is shot
i have a 97 manual, my vehicle speed sensor is not working, i checked the codes and also had nissan take a look and its gone bad. i have hesitated to have it fixed because i can go over the rev limiter now, its like that function is gone. Used to if you reached a certain point in rpms it would shut you down so you just shifted real quick, but now there is limiter on mine. my guess is that my vehicle speed sensor is shot
I dont think i have a rev limiter either, if i do i havent hit it in 2 years.
05-29-2003, 06:48 AM
#14
Originally posted by Ceasars Chariot
i have a 97 manual, my vehicle speed sensor is not working, i checked the codes and also had nissan take a look and its gone bad. i have hesitated to have it fixed because i can go over the rev limiter now, its like that function is gone. Used to if you reached a certain point in rpms it would shut you down so you just shifted real quick, but now there is limiter on mine. my guess is that my vehicle speed sensor is shot
i have a 97 manual, my vehicle speed sensor is not working, i checked the codes and also had nissan take a look and its gone bad. i have hesitated to have it fixed because i can go over the rev limiter now, its like that function is gone. Used to if you reached a certain point in rpms it would shut you down so you just shifted real quick, but now there is limiter on mine. my guess is that my vehicle speed sensor is shot
05-29-2003, 06:50 AM
#15
Originally posted by Stephen Max
I was wondering about this just the other night. Looks like a little research with the FSM and a little experimentation is in order.
I was wondering about this just the other night. Looks like a little research with the FSM and a little experimentation is in order.
05-29-2003, 10:12 AM
#17
Rev limiter
Originally posted by Nealoc187
Wait wait wait... do you mean that you can go over the stock RPM limiter (6550rpms, looks like about 6700 on the tach) or do you mean you can go over the old GOVERNOR at 116mph? If you mean your RPMS are no longer limited then that's a huge thing for guys with MEVI who don't want to drop another $600 on an ecu.
Wait wait wait... do you mean that you can go over the stock RPM limiter (6550rpms, looks like about 6700 on the tach) or do you mean you can go over the old GOVERNOR at 116mph? If you mean your RPMS are no longer limited then that's a huge thing for guys with MEVI who don't want to drop another $600 on an ecu.
My car has no rev limit. I remember when it was brand new. I took off flying down an on ramp getting on to the interstate. I took off in first and the car shut down..i was like what ?? then i could tell that if i went to high in the rpms, the car would "shut off so to speak" i guess it is for safety reasons, but like i was saying.. i have noticed that the max no longer does this anymore. I have gotten used to it now, but i will go out and check and make for certain.
Now since im not close to being a mechanic, my guessing will probably be bad, but i thought it might have something to do with my vehicle speed sensor being out. I checked the codes a while back and thats what came up, then i went to nissan and told them to check it and they also said it was out. said it would be around 97 dollars to replace.
it may take a mechanically minded person to review the vehicle speed sensor being out to determine if this could cause the revs no to be limited.
Again I will verify all this for certain but im almost 95 percent certain the car does not limit the rpms anymore.
as for as the governor thing. I do not have that either. i can stick the needle on 140 ..
05-29-2003, 10:48 AM
#18
Re: Rev limiter
Originally posted by Ceasars Chariot
My car has no rev limit. I remember when it was brand new. I took off flying down an on ramp getting on to the interstate. I took off in first and the car shut down..i was like what ?? then i could tell that if i went to high in the rpms, the car would "shut off so to speak" i guess it is for safety reasons, but like i was saying.. i have noticed that the max no longer does this anymore. I have gotten used to it now, but i will go out and check and make for certain.
Now since im not close to being a mechanic, my guessing will probably be bad, but i thought it might have something to do with my vehicle speed sensor being out. I checked the codes a while back and thats what came up, then i went to nissan and told them to check it and they also said it was out. said it would be around 97 dollars to replace.
it may take a mechanically minded person to review the vehicle speed sensor being out to determine if this could cause the revs no to be limited.
Again I will verify all this for certain but im almost 95 percent certain the car does not limit the rpms anymore.
as for as the governor thing. I do not have that either. i can stick the needle on 140 ..
My car has no rev limit. I remember when it was brand new. I took off flying down an on ramp getting on to the interstate. I took off in first and the car shut down..i was like what ?? then i could tell that if i went to high in the rpms, the car would "shut off so to speak" i guess it is for safety reasons, but like i was saying.. i have noticed that the max no longer does this anymore. I have gotten used to it now, but i will go out and check and make for certain.
Now since im not close to being a mechanic, my guessing will probably be bad, but i thought it might have something to do with my vehicle speed sensor being out. I checked the codes a while back and thats what came up, then i went to nissan and told them to check it and they also said it was out. said it would be around 97 dollars to replace.
it may take a mechanically minded person to review the vehicle speed sensor being out to determine if this could cause the revs no to be limited.
Again I will verify all this for certain but im almost 95 percent certain the car does not limit the rpms anymore.
as for as the governor thing. I do not have that either. i can stick the needle on 140 ..
05-29-2003, 11:02 AM
#19
"I'm running with scissors!"
Thread Starter
Join Date: Feb 2003
Posts: 586
Re: Re: Rev limiter
Originally posted by Stephen Max
If we can figure this out and come up with an easy rev limit override, then I nominate this for Post of The Year.
If we can figure this out and come up with an easy rev limit override, then I nominate this for Post of The Year.
7200 rpm redline: $0.00
the grin on every max/I30 owners face: priceless
05-29-2003, 12:18 PM
#20
hey , just got back to work. first i want to say, im no mechanic, and i dont know anything about engines, last week i had the dealership clean out my throttle body, cost me $110 .. but anyways back to the rev limiter thing. I can redline the car and its up to me to shift, the car is not cutting off like it did. I was reading another persons post that said they didnt think theirs was working either, and for me it was the same thing. I thought about it once in a while, but when i read this post i thought i would toss my two cents in, because i drive the chariot hard..and then it dawned on me ..the car isnt cutting out.
As to way the car is not limiting the revs, i cannot say. I do know that i have a service engine soon light on. I read the codes and it said vehicle speed sensor. Then like i said nissan checked the sensor and said it was gone and i should get a new one. they priced it and that was that. They did not act like it was a big deal and just left it up to me. So I havent gotten it fixed.
Here is something to think about. from the sensor not working in the car, i have no cruise control, and mysterious gas mileage. it seems that my car uses more gas than i think it should. again, nothing im saying is set in stone because i lack the mechanical knowledge to pinpoint it. all i can say is that my rev limiter is not working, and i thought maybe the speed sensor might have something to do with it. i guess i could always go in and have it fixed and then report in. but it will be sometime, i have a long list of mods. and i mean long !
As to way the car is not limiting the revs, i cannot say. I do know that i have a service engine soon light on. I read the codes and it said vehicle speed sensor. Then like i said nissan checked the sensor and said it was gone and i should get a new one. they priced it and that was that. They did not act like it was a big deal and just left it up to me. So I havent gotten it fixed.
Here is something to think about. from the sensor not working in the car, i have no cruise control, and mysterious gas mileage. it seems that my car uses more gas than i think it should. again, nothing im saying is set in stone because i lack the mechanical knowledge to pinpoint it. all i can say is that my rev limiter is not working, and i thought maybe the speed sensor might have something to do with it. i guess i could always go in and have it fixed and then report in. but it will be sometime, i have a long list of mods. and i mean long !
05-29-2003, 12:43 PM
#22
Not DAVEB the parts guy
Join Date: Aug 2000
Posts: 8,555
I guess I'm confused because the "fuel cut" is controlled by the ECU. It simply uses the rpm signal (from the coil packs) and when your rpms exceed 6550rpms, the motor hits the rev-limiter/fuel cut. Our tachs are off by about 200-400rpms depending on gear. I suggest that you guys that say you don't have any sort of fuel-cut go out and do a test run 2nd gear and take it to an indicated 7000rpms. Technically you shouldn't be able to got over an indicated 6700-6800rpms before you hit the fuel-cut. It should make a "baaa...baaa...baaa...baaa" sound when you hit it.
I have a hard time believing Nissan about be fine with you being able to technically blow up you motor by revving to 8000+rpms. Are you sure you're not confusing this with the top speed limiter?
Dave
I have a hard time believing Nissan about be fine with you being able to technically blow up you motor by revving to 8000+rpms. Are you sure you're not confusing this with the top speed limiter?
Dave
05-29-2003, 12:57 PM
#23
Re: Re: Rev limiter
Hmmm. Well, curiosity wouldn't leave me alone, so I took a break and went out to my car and disconnected the speed sensor from its harness and went for a drive. Two observations:
1. Speedometer and odometer didn't work.
2. I accelerated in first gear, partial throttle, and hit the rev limiter, just like usual.
So either something else is going on with Caesar's car, or maybe I'm not understanding what he's saying. But I'm going to have to withdraw my nomination.
1. Speedometer and odometer didn't work.
2. I accelerated in first gear, partial throttle, and hit the rev limiter, just like usual.
So either something else is going on with Caesar's car, or maybe I'm not understanding what he's saying. But I'm going to have to withdraw my nomination.
05-29-2003, 01:40 PM
#25
Originally posted by nismos14
can't u kill the rpm limiter by cutting a specific signal wire from the ecu? or rigging it to connect to a different source so as to tell the ecu that there is nothing wrong with the rpm's?
can't u kill the rpm limiter by cutting a specific signal wire from the ecu? or rigging it to connect to a different source so as to tell the ecu that there is nothing wrong with the rpm's?
It may just be a simple modification made to the ECU, but I think that's a pretty closely guarded secret.
05-29-2003, 05:11 PM
#26
"I'm running with scissors!"
Thread Starter
Join Date: Feb 2003
Posts: 586
Originally posted by Stephen Max
It may just be a simple modification made to the ECU, but I think that's a pretty closely guarded secret.
It may just be a simple modification made to the ECU, but I think that's a pretty closely guarded secret.
(A little story)
about a year ago my buddy with a turbo t-bird auto, the last year that they made them, got his ecu reprogramed with some tool(looked like a scan tool but it wasn't) that plugged into the scan port. he upped his redline like 700rpm, changed the shift points, fuel curve, and ignition timing.
he said that it is the same tool that they used to reprogram police car motors. have any of you guys heard of somethiing like that? maybe it could work for us?
05-29-2003, 11:40 PM
#27
Originally posted by mayhemI30
well maybe we should look into it.
(A little story)
about a year ago my buddy with a turbo t-bird auto, the last year that they made them, got his ecu reprogramed with some tool(looked like a scan tool but it wasn't) that plugged into the scan port. he upped his redline like 700rpm, changed the shift points, fuel curve, and ignition timing.
he said that it is the same tool that they used to reprogram police car motors. have any of you guys heard of somethiing like that? maybe it could work for us?
well maybe we should look into it.
(A little story)
about a year ago my buddy with a turbo t-bird auto, the last year that they made them, got his ecu reprogramed with some tool(looked like a scan tool but it wasn't) that plugged into the scan port. he upped his redline like 700rpm, changed the shift points, fuel curve, and ignition timing.
he said that it is the same tool that they used to reprogram police car motors. have any of you guys heard of somethiing like that? maybe it could work for us?
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