first off my car is a 99 sentra se sr20de

ok a few ?'s first would i be able to a run a manual ecu in my auto for the time being (will be swapping out trans) i.e. will it throw any codes (not really worried about that) but will it affect the transin any way?

also from what i remeber and i've forgot alot about sentras since ive been modding my 240, the p10 g20 ecu's are the way to go as far as no speed limiter and (but i doubt) rev limiter?

what years are these subject too? also would it be any difference if i ran the pre 98 ecu in my 99, does the connector just plug in the ecu? also since i(and i beleive) the p10 is obd-l is that going to affect anything? i know oynx eros swapped one in i beleive in his 98-99.

anyhelp is appreciated

well, since this is my next mod, i can prolly help a little. i know Storm was runnin' an auto g20 ecu in his manual 98. AFAIK, there was a just a slight hesitation. regardless, putting a g20 in yer SEL will get you a MIL. the 94-96 g20 ecus are obd-II, that's why they work for us 98-99 peeps. the speed governer is removed, but the rev limiter is still there, it's just raised to 7800 rpm. lastly, what have you done to your 99? have you dynoed it yet?

I don't think you can run a manual ECU in an automatic car. The auto ECU in a 5spd car throws a code because of the automatic ECU. Your car has 2, one below the radio(main one), and one in the passenger kick panel(tranny ECU). The automatic ECU knows about the second ECU, but the manual one doesn't. You can try it, but I'm sure it will either not work, or you will have some driveability issues.

I just did this. I have an auto SE Limited and I had to buy a core couldnt use my 99 ECU. So that was $250 I think I got overcharged but its all good. The core was a 96 200sx SE-R auto and clark did the POP and S3 program on it. You have rerout some vaccum lines and the Check engine light is because of the O2 sensor in the cat (this is what I was told) That O2 sensor checks to see if the cat is working or something like that and the 02 sensor in the 95-97 SE-Rs were bigger so you gotta bore out that hole and stick a bigger 02 sensor in there to get rid of it.

I paid like $875 for all this shit installed. Freakin sucks I think JWT knows how to crack the ecu code they just think since theres not that many people with 98-99 SE-Rs they could ignore it and just make bank off of foos who do have these cars

well the reason im asking about this is cause im actually swapping out my trans for a manual one. so i wont be using it in my auto (maybe until i get the swap done) and even then i dont think i have enough founds for a cheaply priced used ecu to swap in.

i havent done much to my se-l just nis knacks stealth proj's and corners with red grey leather seats, an open air box mod, and 98 ghetto grill.

my 240's my project until and if i eventually do the swap. then we will see what comes outta my sentra.

if you want to see pics of my sentra they are on my website

I know for a fact an auto ECU will work in a manual car.

But I don't think a manual ECU will work in an auto car. I'm not sure what I mean by "work" either - as in, not start at all, or not shift out of first gear :confused:

Originally posted by Stiletto
but the rev limiter is still there, it's just raised to 7800 rpm.


Actually the G20 ECU has a 7500rpm limit just like the B13's and NX2000's. You need to send your ECU to JWT to raise it to 7800.

Originally posted by Storm88000
Actually the G20 ECU has a 7500rpm limit just like the B13's and NX2000's. You need to send your ECU to JWT to raise it to 7800.

:eek: doh!! thanks for the correction.

Originally posted by silverser99
.....You have rerout some vaccum lines and the Check engine light is because of the O2 sensor in the cat (this is what I was told) That O2 sensor checks to see if the cat is working or something like that and the 02 sensor in the 95-97 SE-Rs were bigger so you gotta bore out that hole and stick a bigger 02 sensor in there to get rid of it.

Can you go into more detail as to which vaccum lines you have to reroute? Is there anything else you have to do besides this and just swapping the ECUs? I had a chat with a buddy who also wants to swap a 95g20 ECU into his 99 and he mentioned unplugging some sensors under the hood and in the back by the fuel tank.

Check the SE-R list archives, its in there.

Originally posted by eric96ser
Check the SE-R list archives, its in there.

you mean on se-r.net? man i havent been there in ages!:cool:

well thanks for the replies and info guy's. i will see what i will do once i swap everything in and its complete (por in between that period)
looks like i might just try to keep my auto ecu and run it once the car is swapped to a manual trans. and then after i have money maybe get a pre-97 or one of the aforementioned g20 ecu's and get them reprogrammed thru jwt

im a little late to the party but i made it.

If you need any more info pm me and I will see if i can help, what everyone says above is true. I would say be sure to get a manual g20 for when you do the tranny swap.

o

well the tranny is sitting at work waiting for me to get the needed parts.

onyx did the g20 ecu need any rewiring? did it throw anymil codes on?
and if its just a o2 sensor thats no biggie i can get that ;)

since its not a lsd i dont need to swap out any axles as if i swapped in a lsd which has a shorter driver side axle. (correct me if im wrong)
also i will need new pedals, crossmember, linkage, rods,shifter, speedo gears? flywheel gear i know i need, pressure plate, clutch,

now with the trans mounts do i just need the mount itself, meaning where its held in by a bolt not the whole welded on mounting assy.

if anyone has a faq to point me out to that would be helpful i know this has come up many times.

Originally posted by CAMPPAIN
well the tranny is sitting at work waiting for me to get the needed parts.

onyx did the g20 ecu need any rewiring? did it throw anymil codes on?
and if its just a o2 sensor thats no biggie i can get that ;)


no need for rewiring, yes you get a light but i still get 34mpg on the highway
O