View Poll Results: Would you buy a 1999 ecu upgrade? jwt or gforce
I'd buy one in a heartbeat
41
60.29%
I'm interested but dont have the dough right now.
24
35.29%
Whats an ecu upgrade?
3
4.41%
Voters: 68. You may not vote on this poll
Poll: I want a ECU upgrade for my 1999 4th gen
09-17-2003, 06:35 AM
#44
Just ran across this on one of the G20 sites. It's how Sentra owners are doing it for their 99's.
Nismo87SE already posted the details for our car but I thought this was pretty clear about the steps involved for theirs.
http://www.g20style.com/how_to_wire_a_95.htm
What caught my eye was the middle of the page talking about the 3-wire vs 4-wire harness for the 02 sensor. Might be that simple to avoid the 0707 CEL.
Nismo87SE already posted the details for our car but I thought this was pretty clear about the steps involved for theirs.
http://www.g20style.com/how_to_wire_a_95.htm
What caught my eye was the middle of the page talking about the 3-wire vs 4-wire harness for the 02 sensor. Might be that simple to avoid the 0707 CEL.
09-17-2003, 08:47 AM
#45
Originally Posted by BEJAY1
Just ran across this on one of the G20 sites. It's how Sentra owners are doing it for their 99's.
Nismo87SE already posted the details for our car but I thought this was pretty clear about the steps involved for theirs.
http://www.g20style.com/how_to_wire_a_95.htm
What caught my eye was the middle of the page talking about the 3-wire vs 4-wire harness for the 02 sensor. Might be that simple to avoid the 0707 CEL.
Nismo87SE already posted the details for our car but I thought this was pretty clear about the steps involved for theirs.
http://www.g20style.com/how_to_wire_a_95.htm
What caught my eye was the middle of the page talking about the 3-wire vs 4-wire harness for the 02 sensor. Might be that simple to avoid the 0707 CEL.
why doesn't someone with a FSM look up the harness and compare it to the G20 harness so we can have a guide to attempt the wiring.
09-17-2003, 10:04 AM
#46
Originally Posted by BEJAY1
Just ran across this on one of the G20 sites. It's how Sentra owners are doing it for their 99's.
Nismo87SE already posted the details for our car but I thought this was pretty clear about the steps involved for theirs.
http://www.g20style.com/how_to_wire_a_95.htm
What caught my eye was the middle of the page talking about the 3-wire vs 4-wire harness for the 02 sensor. Might be that simple to avoid the 0707 CEL.
Nismo87SE already posted the details for our car but I thought this was pretty clear about the steps involved for theirs.
http://www.g20style.com/how_to_wire_a_95.htm
What caught my eye was the middle of the page talking about the 3-wire vs 4-wire harness for the 02 sensor. Might be that simple to avoid the 0707 CEL.
I've heard of a few guys with aftermarket alarms who left NVIS alone and just put the transponder inside the steering column and used a regular cut key. However, with an earlier ECU the NVIS is physically gone, so you'll have to remove the system from the rest of the car; transponder system in the steering column, fuel pump cutoff mechanism, etc.
-hype
09-17-2003, 11:19 AM
#48
Originally Posted by xHypex
Again I'm going to stress NVIS. Maximas got it in '99 while the G20s got it in 2000 and Sentras didn't get it till 2000+. I'm pretty sure NVIS is an ECU controlled system with multiple parts, and we definitely know Nissan doesn't want you removing it
I've heard of a few guys with aftermarket alarms who left NVIS alone and just put the transponder inside the steering column and used a regular cut key. However, with an earlier ECU the NVIS is physically gone, so you'll have to remove the system from the rest of the car; transponder system in the steering column, fuel pump cutoff mechanism, etc.
-hype
I've heard of a few guys with aftermarket alarms who left NVIS alone and just put the transponder inside the steering column and used a regular cut key. However, with an earlier ECU the NVIS is physically gone, so you'll have to remove the system from the rest of the car; transponder system in the steering column, fuel pump cutoff mechanism, etc.
-hype
09-17-2003, 11:47 AM
#49
Originally Posted by slimer
but i have a 98 so i shouldnt have nvis
1) You're posting in the wrong thread
and
2) You can already get an ECU, you'll just get a check engine light which is better than not being able to have an ECU at all
-hype
09-24-2003, 05:42 AM
#50
NVIS shouldnt be a concern, if it was all the bmw ecu upgrades, audis, and others would pose an issue for makers as well. NVIS wouldnt and shouldnt inhibit a company from taking my ecu and reprogramming it, since I'm a 99 I wouldnt mind if I had several days down time to get it. Reprograming fuel maps, and rev limiters wont effect NVIS.
09-24-2003, 10:08 AM
#52
Originally Posted by infinitiblast
NVIS shouldnt be a concern, if it was all the bmw ecu upgrades, audis, and others would pose an issue for makers as well. NVIS wouldnt and shouldnt inhibit a company from taking my ecu and reprogramming it, since I'm a 99 I wouldnt mind if I had several days down time to get it. Reprograming fuel maps, and rev limiters wont effect NVIS.
The real problem overall is that the code for 97+ ECUs hasn't been cracked, so they can't be reprogrammed.
-hype
09-24-2003, 10:45 AM
#54
09-24-2003, 10:55 AM
#55
Originally Posted by xHypex
Correct, if you use a '99 ECU and have it reprogrammed by someone like JWT (who doesn't do 97+). Most of the talk of this thread has been taking a '95/96 ECU and adapting the harness to work on a '99. This isn't just a reprogram since the early ECUs don't have NVIS to begin with.
The real problem overall is that the code for 97+ ECUs hasn't been cracked, so they can't be reprogrammed.
-hype
The real problem overall is that the code for 97+ ECUs hasn't been cracked, so they can't be reprogrammed.
-hype
09-24-2003, 11:03 AM
#56
Yeah I think its coming down to what they think has the strongest support which is understandable, and what they are willing to sit down and do. I bet if we throw enough money at them up front they can figure it out. I'm not giving up on this even if I have to contact some three english word speaking japanese guy in japan to do my ecu. It will get done. lol.
10-09-2003, 05:44 PM
#60
Supporting Maxima.org Member
Join Date: Jul 2003
Location: San Bruno, CA (SF Bay)
Posts: 3,747
Originally Posted by SuperFishstick
so it will work on a 98 ? I heard it will with a CEL light for the rear O2. my only concern is emmissions. If they see a CEl, they might not let you test it. And then what?
10-09-2003, 08:56 PM
#61
Originally Posted by SuperFishstick
so it will work on a 98 ? I heard it will with a CEL light for the rear O2. my only concern is emmissions. If they see a CEl, they might not let you test it. And then what?
11-13-2003, 12:10 PM
#63
Yes I am. However I'm doing it with my own funding because no one came to the plate when it came time to get some intial work done. Quite a shame actually........everyone wants one...they just dont want to give any money up to start the process. 
11-14-2003, 11:10 AM
#66
Originally Posted by infinitiblast
Yes I am. However I'm doing it with my own funding because no one came to the plate when it came time to get some intial work done. Quite a shame actually........everyone wants one...they just dont want to give any money up to start the process.
, but I'd be willing to help fund a project if I knew it was going to happen, and what was going on. Who are you looking at to develop this?
11-15-2003, 06:47 AM
#69
Um actually I had posted if everyone gave like 5 bucks each we could buy a spare 99 ecu to send to this guy. I got three or four responses. So i bought it myself. The guy does ecu upgrades for sr20det, silvia motors, and the skyline. I'll keep everyone updated.
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