RB25DET tunning help

[madmax89]

hellow im Max i recently got my RB25det put back together .i can take her arrown the block with it running smooth and alot of power.died at the stop sigh but ran great.. second lap starts to spudder & i have to shut off the car to reset the ecu 2 or 3 times to get her back home ...

stock ECU FOR RB25DET S2
wiring secialties harness
stock maf
ebay fpr
ebay boost controller
mishimoto radiator dual fan. no shroud


the dash rpm,mph ,and temp do not work.exp the fuel gauge .

should i get get a different ECU like 300zx with a chip tune or can i use the stock ecu? i need the car driveable by the end of march. i dont have the money or time for aem plug in play i need the cheapest option for now just to get her reliable and drivable ..i need some options from you all please help..

[2.5T_/<ouki]

hellow im Max i recently got my RB25det put back together .i can take her arrown the block with it running smooth and alot of power.died at the stop sigh but ran great.. second lap starts to spudder & i have to shut off the car to reset the ecu 2 or 3 times to get her back home ...

stock ECU FOR RB25DET S2
wiring secialties harness
stock maf
ebay fpr
ebay boost controller
mishimoto radiator dual fan. no shroud


the dash rpm,mph ,and temp do not work.exp the fuel gauge .

should i get get a different ECU like 300zx with a chip tune or can i use the stock ecu? i need the car driveable by the end of march. i dont have the money or time for aem plug in play i need the cheapest option for now just to get her reliable and drivable ..i need some options from you all please help..


I see a lot of posts like these and they all have 1 thing in common, wiring specialties harness. Anyways, that's probably not the case. Kind of sounds like a MAF problem.

Cheapest route is to fix your issue and use stock ECU.

[madmax89]

(quote: I see a lot of posts like these and they all have 1 thing in common, wiring specialties harness. Anyways, that's probably not the case. Kind of sounds like a MAF problem.

Cheapest route is to fix your issue and use stock ECU:quote)


how do i check the maf ? are there any good alternatives that are compadable to the r33 s2 ecu.. i got the maf used from raw broke..

how can i check codes on the stock ecu?

[S14_BOSS]

(quote: I see a lot of posts like these and they all have 1 thing in common, wiring specialties harness. Anyways, that's probably not the case. Kind of sounds like a MAF problem.

Cheapest route is to fix your issue and use stock ECU:quote)


how do i check the maf ? are there any good alternatives that are compadable to the r33 s2 ecu.. i got the maf used from raw broke..

how can i check codes on the stock ecu?

Here a couple links that explain how to go about checking your ECU for codes as well as providing you with which codes correspond to which part.

btw, what color sticker is your MAF? Also, what psi do you have your fpr set to? There is a gauge on it right?

Reading Nissan Fault Codes Ecu Fault Codes How Read Them - General Maintenance - Skylines Australia (http://www.skylinesaustralia.com/forums/topic/266512-reading-nissan-fault-codes-ecu-fault-codes-how-read-them/)

checking codes on rb25 s2 : RB20DET / RB25DET / RB26DETT Forum (http://forums.nicoclub.com/checking-codes-on-rb25-s2-t337659.html)

[fliprayzin240sx]

Did you email Yury to help you trouble shoot it? Only the speedo should be off but everything else should be working on your cluster.

What errors where you getting on the ECU since you said you had to reset it?

[madmax89]

RB25det into s13, only the gas gauge and the lights on the right side work on the dash it's a wiring specialties harness. I can't read the codes because my engine light won't come on my dash. it might be my dash harness, when I press on the plug on the behind the dash the ebrake light works.. Hhmm..the motor its self runs great but idles at high rpm until I lower the fuel pressure or unplug the TPS and plug in only the great plug on the bottom..then she idols nice

[2.5T_/<ouki]

RB25det into s13, only the gas gauge and the lights on the right side work on the dash it's a wiring specialties harness. I can't read the codes because my engine light won't come on my dash. it might be my dash harness, when I press on the plug on the behind the dash the ebrake light works.. Hhmm..the motor its self runs great but idles at high rpm until I lower the fuel pressure or unplug the TPS and plug in only the great plug on the bottom..then she idols nice

I was under the impression that the other plug on the TPS was for an automatic. Do you have a consult cable? It would be wise to get one that way you can hook up to a laptop to your consult port and read any error codes. Have you tried getting a mm and reading the TPS voltages while at closed throttle and WOT? Engine doesn't need to be on for this test just ignition on. (0.45v @ closed / 4.2-4.5v @ WOT.) you should open the TB slowly to read the voltages and watch them increase, they should go up without any hiccups or hesitation. High idle can be due to coolant temp sensor also.

[zuanpejn]

You gotta love it when a plan comes together.
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[madmax89]

KY jelly and im going to test the tps tomorrow ..is it possible to use a plug on your consul for a rb 25 s2 setup into s13
? I need to chck codes

[2.5T_/<ouki]

KY jelly and im going to test the tps tomorrow ..is it possible to use a plug on your consul for a rb 25 s2 setup into s13
? I need to chck codes

I have no idea what you're trying to ask lol. But if you're wondering about a consult port for your RB25 in your s13 yes it's possible.

This page shows how to wire it up correctly. I've got an extra consult port if you need one.

http://www.nistune.com/docs/Installation_and_Communication_Diagnostics.pdf

[madmax89]

sorry bro I was in a rush. I do not have a console port. Would i be able to connect it to the OBD 1 port on my s13 dash harness or would i have to pigtail off the ecu? I I wonder if the software is compatible with the s2 ECU? Would i be better off getting a different ecu? Can i wire up an extra warning lamp to check codes ?

I'm on my phone so I can't really copy and paste your quotes

sorry about the lack of communication I've been at work and haven't had WiFi
but to answer any unanswered questions

S14_boss : what color maf ? what is your FPR PSI?
- I have the pink sticker maff for s2.
- fPR PSI is set between 35 and 37 , it pulses so it it's hard to get an accurate reading on the gauge

[2.5T_/<ouki]

sorry bro I was in a rush. I do not have a console port. Would i be able to connect it to the OBD 1 port on my s13 dash harness or would i have to pigtail off the ecu? I I wonder if the software is compatible with the s2 ECU? Would i be better off getting a different ecu? Can i wire up an extra warning lamp to check codes ?

I'm on my phone so I can't really copy and paste your quotes

sorry about the lack of communication I've been at work and haven't had WiFi
but to answer any unanswered questions

S14_boss : what color maf ? what is your FPR PSI?
- I have the pink sticker maff for s2.
- fPR PSI is set between 35 and 37 , it pulses so it it's hard to get an accurate reading on the gauge

As long as your wiring harness is wired up properly then yes the OBD1 port on your dash harness should work fine. This is usually found by the driver side kick panel where all the fuses and relay's are. This is exactly how i connect to mine from that port and it works perfect. If it doesn't work for you then you will need to splice in a consult port into the ECU harness.

To answer your questions, the software is 100% compatible with the S2 ECU and there is no real benefit of getting a different ECU unless you were going to tune your S2. It works for me on my S2 ECU and my Z32 ECU w/ NIStune.

I use the programs: ECUTalk or Conzults which both work perfectly.

[madmax89]

((As long as your wiring harness is wired up properly then yes the OBD1 port on your dash harness should work fine. This is usually found by the driver side kick panel where all the fuses and relay's are. This is exactly how i connect to mine from that port and it works perfect. If it doesn't work for you then you will need to splice in a consult port into the ECU harness.

To answer your questions, the software is 100% compatible with the S2 ECU and there is no real benefit of getting a different ECU unless you were going to tune your S2. It works for me on my S2 ECU and my Z32 ECU w/ NIStune.

I use the programs: ECUTalk or Conzults which both work perfectly.))


what consult plug should i get..i found nissan consult port on ebay for 24.99 or one for 79.99 ..how much would you sell me the one you have ?

[2.5T_/<ouki]

((As long as your wiring harness is wired up properly then yes the OBD1 port on your dash harness should work fine. This is usually found by the driver side kick panel where all the fuses and relay's are. This is exactly how i connect to mine from that port and it works perfect. If it doesn't work for you then you will need to splice in a consult port into the ECU harness.

To answer your questions, the software is 100% compatible with the S2 ECU and there is no real benefit of getting a different ECU unless you were going to tune your S2. It works for me on my S2 ECU and my Z32 ECU w/ NIStune.

I use the programs: ECUTalk or Conzults which both work perfectly.))


what consult plug should i get..i found nissan consult port on ebay for 24.99 or one for 79.99 ..how much would you sell me the one you have ?

Do you have a consult cable to read from the consult port? Shoot me a PM we can discuss and i can help you out.