Jump to content
SAU Community

Recommended Posts

hey guys,

so hopefully this is the last time i have to put up a help question lol,

but my rb25det idles at 750-800, i cleaned out all the cold start and aac valve and tried to adjust the ilde again, i did all that and it came up with 750-800 once hot,

so alot of people think that is a good idle for the car (stock) but i find if i come to lights and brake a bit hard and put the clutch in at the same time the car will stall, so i like my idle between 900-1000 so it can catch it before it stalls,

now i know that you can adjust the idle from 0-250rpm on the ecu, but this is whats screws, my ecu doesnt have a light or a switch, it must have been taken out for some unknown reason,

so ive got 3 choices, unless there is another way?

Put a RB25det series 1 ECU in and run the car on that (if this can be done? heard something bout different fuel maps?)

Take the light and switch out of the series 1 ECU and solder it into the series 2 ecu? (if that can be done?)

Or get a series 2 ecu that has it so i can adjust this idle,

any comments would help me alot

(sorry if this is ment to go in general topics)

Cheers JV

Link to comment
https://www.sau.com.au/forums/topic/255940-i-dont-believe-this/
Share on other sites

wind the screw out brings idle up, its out as far as possible,

ive got 1 more choice, tighten the accel cable to make it idle at 1000?

i know vct will be activated by doing this? but what does everyone think? it wont cause problems will it? or will the 20 deg advance with vct been on suck at idle?

hey ive had a think about this,

is there anyway that i can make the throttle body more open without activating the vct? like there is the screw (stopper) on the throttle body, so maybe if i screw it out so the throttle body will be more open? to bring the revs up. but the will this activate the vct? or does it get its signal throught the metal stopper? or can the tps be adjusted? and will this still mean my idles will go up?

Cheers hope this made sense

have u tried resetting your ecu?

and i think your base idle has to be set by taking one of the plugs off the aac valve then adjusting the screw

otherwise it doesnt do a great deal. not sure why but yeah. try reseting your ecu and pulling the purple plug i think off your aac valve then adjusting the screw

back when i bought my car it was dead stock, literally all it had was the spoiler, rear gtr pods and a stereo

it used to idle around 750 or so rpm when i got it and didnt stall, put an atmo bov on it for a little bit and it stalled so i took it off and it kept stalling every so often when returning to idle. Cleaned aac valve, cleaned afm did a few other things and nothing helped

reset ecu (unplugged battery and pressed brake down for 20 seconds or so) then car ran beautifully :thumbsup:

so yeh give it a go. As for the aac screw, if resetting the ecu doesnt help try what i said

hope you get it sorted

Edited by Boostin96
have u tried resetting your ecu?

and i think your base idle has to be set by taking one of the plugs off the aac valve then adjusting the screw

otherwise it doesnt do a great deal. not sure why but yeah. try reseting your ecu and pulling the purple plug i think off your aac valve then adjusting the screw

back when i bought my car it was dead stock, literally all it had was the spoiler, rear gtr pods and a stereo

it used to idle around 750 or so rpm when i got it and didnt stall, put an atmo bov on it for a little bit and it stalled so i took it off and it kept stalling every so often when returning to idle. Cleaned aac valve, cleaned afm did a few other things and nothing helped

reset ecu (unplugged battery and pressed brake down for 20 seconds or so) then car ran beautifully :thumbsup:

so yeh give it a go. As for the aac screw, if resetting the ecu doesnt help try what i said

hope you get it sorted

is that how u reset the ecu? i thought u just un plug the ecu and that will reset it? ok so maybe 2morrow i will wind the screw in and start the car, then once the car is warm unplug the aac and wind it out, and plug back in to see if it has brought up the idle, if not then i will give that ecu reset a shot,

what does your car idle at now? i still have all stock bov and stuff (going to block it off with a coke can cause it sounds like shit)

otherwise am i able to adjust that screw on the throttle body? so it holds it open more? but then how do i adjust the tps to match that? if any1 could give me info on that, then that would be good,

Thanks

answer 1 work whyyour stall cause it shouldnt

asnswer 2 adjusted the throltestop srew

alot of cars, well all of my cars (rb20 skyline, rb25 skyline, ca18det 180sx, sr20 180sx), when ever i have idled them on stock idle (800), if you are coming down a hill, and theres traffic lights which turn red, and you brake and put in the clutch quickly, the car wont be able to catch in time and stall,

so to counter this i bring up the idle so it can catch it in time,

for your answer number 2,

obviously i know i can adjust that, but if you have read my post i would like more info than that,

when throttle is open, the vct is on so timing is put up to 20deg instead of 15 deg, will this cause anything on idle?

also, if i was to do this to keep the vct off i would have to change the angle of the tps, so again, how do i know where its in the right position? what voltage does it put out in the right position? and what colour wires do i measure?

also i mentioned my ecu doesnt have something i can adjust idle with,

so really you havent answered anything,

ok guys, so i think i have fixed it,

i reset the ecu and put theidle screw back in to retry it again, cold start was idling at 1100 and then it went down to about 900 once a bit warm, as soon as the aac kicked in the car nearly stalled so i held the revs up so i could get this screw out a bit, got it out to the same place as before (right out) and the car was idling at about 750. so non of that fixed it,

so what i did is have my brother watch the revs and i screw out the stopper screw so it held the tb open a bit to bring the revs up, it took a few goes to get because if you went that 1/4 turn to far vct will come on and jump the revs up, so ive managed to adjust the idle up to 950 without vct coming on,

so im going to wait for it to cool and then start it up again and see how it goes, i probablyt should change the spark plugs to as its still got the spark plugs from japan lol, o well

cheers for all the replies

JV

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


  • 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...