Jump to content
SAU Community

Recommended Posts

Just a quick one for the brains trust, Having troubleswith the CTS on an RB25 might by a faulty sensor or Hot starts were not dealt with whilst car got tuned remains to be seen (however unpluging the sensor and the car starts first cank every time hot or cold) so im going to replace the sensor anyway just to rule it out, My question is the motor is an RB25 however the ECU is a Z32 NIStune soooo which sensor??? or are they all the same??

cheers

Andrew

Link to comment
https://www.sau.com.au/forums/topic/411754-rb25-z32-coolant-temp-sensors/
Share on other sites

The more I think about it, it seems more logical that a sensor be paired with an ECU rather than a motor.??? But I'm a nuts and bolts kinda guy and hate wiring and electrical. So I could be totally off but the reason for this line of thinking is I do not know if all sensors pickup temperature at a linear rate in relation to another.. Ie; is 3v on an rb25 sensor the same temp as 3v on a z32 sensor?? I think I need some sort of ECU diag software via consult ??

I use ECUTalk (http://ecutalk.com/ecutalk.aspx), it's free and will show you what the ECU sees as the coolant temp. but you will need a consult cable though.

Quick Q have you ever tried unplugging the sensor and seeing what the ECU defaults to? I've heard 0, 40 and 80 degrees ? just trying to get my head around why it goes from not starting at all to strating 1st crank like a brand new car. Or does having this unplugged trigger some closed loop map??? so much to learn, I hate not understanding shit..

Iv got an RB25 with Z32 (type 2) nistune in it.

Ill try it this on the weekend n check it on nistune n consult n let you know what it does.

That would be awesome should hopefully give a pretty definitive result.

I thought the coolant temp sensors were all the same in the Jap cars from that era?

Give me a Z32 Vin and I'll check them in Nissan Fast

Through a bit of searcing on here i gather 20/26 are the same but cant find much on 25, Kinda fits to as my 20 CTS is Yellow and my 25 one is brown/reddish.

Edit; I had a look on interwebs for a random z32 VIN couldnt find one,

Ok do I'm waiting for my consult cable to arrive, do I thought I would clean the AAC valve in the mean time this lead me to discover that the factory T piece that goes into the AAC was deformed and barely "seated" for want of a better word, I'm sure this would have caused a vacuum leak although vacuum at idle was a. Healthy 17 to 18.. Sooooo is this just a coincidence or could this affect warm start??? ( time to find out if Nissan sell the T piece on its own or am I going to be raped and have to buy An AAC valve whole)

  • 1 month later...

Well not much has changed, busy time of year and track only car = neglect.

So Nissan only sell the AAC whole as the T is pressed into it they wanted 650 or some such. So called SSS for second handy for 50 bux cleaned it up and replaced it so AAC clean and no vacuum leaks. Got consult cable and demo version of conzult with some limited functionality. The Cts seems to be working as the temp goes up idle for 15 20 mins and it went upto about 80 degrees C no faults logged either except for fuel temp sensor ( I didn't even know it had one of those)??

So still at a bit of a stale mate?? Spoke to unigroup (who tuned it) and he reckons it could be the z32 ECU running the 25 that might be spazzing out..??? He's booked out till mid jan so if I figure it out by then great, if not he can cause I'm over it..

  • 1 year later...
  • 2 weeks later...

Yeah not sure about that, he said he had to set some pretty unusual values, possibly for warm crank on sartup it's been a long time

Fair enough, nistune is always having new features added, so possibly wasn't available when yours was tuned. Either way whatever he did worked!

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Seat of the pants assessment of the new intake: The car is way less "doughy" when hitting the loud pedal, especially off idle when stopped or in traffic, I did use a cheapo lazer thermal thingo to measure the temp around where the pod filter got its air, it was between 55 - 60°C, in saying this the car was shut off and not moving, so the OEM intake pipe was not supplying any fresh air to where the pod was when the car was at least moving A weird bonus was induction noise on the throttle in the cabin increased a bit,  I was worried that I was actually going to lose some of that induction noise I love so much, outside though, when I got the daughter to do a WOT drive by pass for me, the induction noise has increased alot when on the throttle, not quite ITB doort, but well up there I'm extremely happy with the results and have been exploring the country roads in the region  As for house mods: 1.New front fence is up and is awesome, it really upgraded how the joint looks from the street, and the added security is nice 2. Electricians have replace some interior lights, and with more lighting in the garage, a few new motion detecting lights out the front above the garage, front room, and at the front door, which I have already found heaps helpful coming and going, also now has fancy pants CCTV all round the house The only hold point for power though is the solar and batteries due to supply issues, although this will happen over the next few weeks 3. I have done a heap of landscaping out the front and I'm almost ready to do a new small retaining wall with some nice blocks to replace the brick and cemented in rocks around the raised garden beds cemented in river stone "was the fashion at the time" the house was built. I currently have a pallet of retaining wall blocks and 2 bulka bags of 20mm blue metal to replace the wood chip that is in the raised garden beds around the house 4. I now have 3 big raised garden beds for out the back to grow some vegetables, about 70cm high, 200cm long and 100cm wide 5. My 2 compost bins are already pretty full with brown, green and kitchen waste from the landscaping I'vedone so far, but they will probably take a few months to break down, so anything else that gets chopped, trimmed, and kitchen waste will just start filling the base of the raised garden beds to about 30cm before I start throwing 40cm of good compost, and stuff, for the vegetables to grow in, I'll need a few ton of compost and soil, but the local supplier can sent me bulka bags of the stuff Basically the logs, wood chips and a few strategically placed rocks for drainage, will give the beds some good organic materials down low to break down over time, and they will hold moisture during the warmer months to save the water in my big arse water tank if we don't get alot of rain So, all in all, the car and house mods are going well, and I'm really enjoying being retired, I sleep in too 0700 and slowly plod around inside until I feel like actually doing anything, and only work in the yard for as long as want, which has actually been alot over the last few weeks,  although when you look at it, it seems that not a huge amount of work has been done,  until I look at the before I started the work pics Happy days and good times indeed 
    • hahaha yeah. Plan is to get side skirts and probably just rear pods. But going to do them one-by-one. I've got a set that I really like from RHDJapen, but that one isn't shipped to AU. So need to find someone who can get it for me
    • Here's an idea, answer the questions I asked you as they are trying to work out WHY the LSD will be binding up in a straight line.
    • You haven't driven many modern cars then have you? Most of them have sfa steering feel with their stupid electric bullshit steering systems.
×
×
  • Create New...