Jump to content
SAU Community

Recommended Posts

Hey guys

as the tittle suggests i need some help/advice on my little car trouble.....i have a r33 s1 and lately when i start it in the morning or when its cold the stutters for about 10-20 seconds or so and then idles properly.....and yes i have a load of fuel in there.....and once its warm it runs normal with all the power.....so i was just wondering what is going on there?????

thanks

Krish

Link to comment
https://www.sau.com.au/forums/topic/213234-little-car-trouble/
Share on other sites

I too am having the same thing happen only in the last week in my series 2, thought it may have been my fuel pump or filter so took it to get dynoed on monday and he said everything is running perfectly with no error codes.

When its warm no problems, only when its cold it will idle low amd eventualty the engine drags it up.

I looked through the forums and i think someone was saying something about cold start sensor or valve, does anyone know anything about this or have any other thoughts??

yeah when you cold start it sounds like the engine is going to die off but after a few seconds it drags itself up to normal idle......well i figured that it cant be the fuel filter as after it has warmed up it runs brilliantly.....so wtf is wrong anyone please....

Yea its your idler thing me and Luke just cleaned mine

krishy i find it hard to believe your idle isnt moving

iv'e got amother issue also after my car has been on for a little while after not being on for ages 5 mins into driving it falls over sometimes i can back off and on and it comes good alot of the time i have to pull over wait 1min and restart car and them it's all good

after the cold start the revs jump up down up and down.....but once its nice and warm it just sits at either 1000rpm or sometimes around 1000-1500rpm....it only jumps up to 1500 from 1000 rpm if i have my fan and other things on at the same time.....but now i come to think of it lately it has been sort of jumpy.....not really noticeable though.....so i will take the baby out for a spin after work and see how it goes from there....fill you all in about it tomorrow

Edited by Krishy

Rush: thats the one, IAC AAC number of different names with the same function.

Krishy, its quite possible the buildup prevents the initial movements of the IAC that's why its bad when cold. Once the car warms up and it has broken the "seal" - less noticable. once cools down again, same issue. Try it and see, cant do any harm giving it a clean anyway ;)

yeah i think i will have to give this a go......well it wont hurt really.....but i am not a very mechanically minded person so slightly hesitant on doing this....anyone with experience....there is a carton in it for ya

yeah i think i will have to give this a go......well it wont hurt really.....but i am not a very mechanically minded person so slightly hesitant on doing this....anyone with experience....there is a carton in it for ya

I'm free this Sat arvo and I wanna do the same thing. I'll be the guinea pig! :P

Forget what Madaz says ... I'll take the carton! :woot:

j/k

Just did my AAC then, was filthy, went through half a box of ear buds. Its not hard krishy, just a prick of a spot to get into. Started it up dead cold and seemed to run normal. Will let it cool right down again and try again a few times but seems to have fixed it so far.

Thanks fellas for all ur help. Let us know how it goes krishy

hey just wondering do you start the car up when you jump in.... or do you get in turn to 1 click back from run and wait for the fuel pump and injectors fill as sometimes they can be a bit dry then starting it up with no fuel in the injectors makes the car stutter for a few seconds.

juest a suggestion.... cheers... michael

also another reason this could happen would be if you have aftermarket ecu and the cold start isnt setup properly, my old 31 coupe used to die a few times on cold mornings before it would run just cause the cold start hadnt been setup on the microtech, probly isnt in this case but just another thing for people to note if they have this issue.

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

    • Had a go at the stuck crush tube this afternoon. Tried things like grips and a chain wrench first but wouldn't just twist straight off. So got to work with a drill. Started small and kept a depth stop on to make sure I didn't drill into the bolt. Made a line of drill holes all the way up and enlarged them. Then a combination of chisel and Dremel to split it all the way up. Levered the split to get oil in there and eventually it gave a bit while levering. Worked it back and forth with loads more oil till it was spinning freely, then with grips I could work it downwards and off. And no significant damage to the bolt (not by me anyway - just the 27 years of rust)
    • Well, I'm tired. I'm tired because about 4PM yesterday, before today's appointment someone immediately bought my bumper. They couldn't get it any other day as they're on the way back to NSW. So I had to do that big GTR conversion I had been planning. Unfortunately, the information on SAU about what you need and how this is done is incomplete. So what should be a simple bolt on affair, yeah, it's not. Did you know if you use all GTR items the bonnet won't close? This little manuever sent me into about 1am the night before trying to dodge a way to get it closed. I will have to revisit this in the next few days  - or maybe not, I may let a body shop figure it out. It all needs to come up and my motivation to pull the bumper off is low. It also seems to hit things in the bay where the GTT bonnet didn't. Yes I used 100% new OEM GTR items. Today, I had the joy of driving to the dyno looking like this: Given I had roughed in the fuel and given sensible but pretty conservative timing, I didn't really bet on having the car drive out any real difference than when it drove in. Sadly due to a miscommunication and laptop fun and games (and almost bricking the dongle, prayers and firmware updates indeed), I ended up using HP Tuner credits to licence the car that was already licenced. So in the end my laptop was used. It turns out my butt dyno is still well calibrated after all this time. The 325kw was on 74% Ethanol, the 313kw line was on 98. The other line is the 'before' line which was 281kw. While the numbers are pretty low, they're pretty in line with what you'd expect. Even if US dynos bump the whole result up about 50KW, gaining 10-15% is similar gains.  The curve of the cam is pretty much spot on with what was discussed as well. All this said, it still feels bad to not see the number you secretly want to see. Even if the car drove great beforehand, and I knew pretty confidently the car would drive out much the same way it drove in due to the nature of a wellish dialled in LS1 not gaining much if anything at all from being tuned from where it was. As expected, the car isn't particularly sensitive to running it at anywhere between 12.0 and 13.0 - And the initial timing at 20deg and 12.0 made 308KW. So 3 degrees of timing, and leaning it out to 12.7 for 5kw, anything above stopped giving any benefit until E85 (which has an additional 2 deg as before). Car itself behaved entirely fine. I found out that 100C = 1.15V! IAT at about 7pm was 19C. I might mess with the bonnet mounting.. but given the REO NEEDS TO BE CHOPPED TO FIT A GTR BAR this is possibly something I may leave gathering (more) dust until it returns to paint jail.
    • It sounds farrrrrrr too cold at your place Duncan... Here I was thinking our 10 degrees overnight is getting cold...
    • oh yeah, reminded this morning....bin lids frozen shut too
    • In my case not, because of total reno. But yeah.
×
×
  • Create New...