Jump to content
SAU Community

Recommended Posts

Hello i have a 1996 Gtst s2

Its got an:

exhaust system

manual boost controller

bov

pod filter

pretty much stock

Ive got a few problems

Firstly, most of the time the idling sits around 700 rpm, but sometimes when warm its at 900 rpm, is that normal???

the actual problem is that when revving it lightly, (say for example reverseing out of a parking bay), or even just revving it once. The rpm drops

to about 500rpm or lower, and sometimes it even stalls. its a real pain because if u rev it gently whilst taking off and then take your foot off the accelerator, it seems like its gonna stall.

but it doesnt always. only sometimes.?

what is wrong and what can i do to fix this?

also the temperature gauge is broken as on cold it shows 1/4 reading and when its warm shows a 3/4 reading.

Also i think my car is running rich as the exhaust pops sometimes when putting ur foot down and changing gears, gaining speed quickly.

fuel also seems to go quickly.

I dont know what my boost is set to because i bought the car second hand. so i really need help. i cant afford a tune either just yet because i wanna see if i can fix these problems myself.

Thankyou :D

Link to comment
https://www.sau.com.au/forums/topic/333918-r33-1996-gtst-idle-problem/
Share on other sites

could be a few problems..

the spluttering / popping noise when your getting on the gas sounds like either 1. coilpacks are f**ked. 2. running to much boost for the factory ecu (R&R) 3. plugs are f**ked..

About the stalling issues / idling issues - my 33 will idle at around 1300rpm on a cold start, operating temp it idles around 650rpm - sounds like the DIY guide to cleaning your aac valve would be worth a shot..

If you dont know what boost your running - i'd turn the boost down to be on the safe side - usually by turning it down you should find your popping/spluttering will go away.

could be a few problems..

the spluttering / popping noise when your getting on the gas sounds like either 1. coilpacks are f**ked. 2. running to much boost for the factory ecu (R&R) 3. plugs are f**ked..

About the stalling issues / idling issues - my 33 will idle at around 1300rpm on a cold start, operating temp it idles around 650rpm - sounds like the DIY guide to cleaning your aac valve would be worth a shot..

If you dont know what boost your running - i'd turn the boost down to be on the safe side - usually by turning it down you should find your popping/spluttering will go away.

Well i just bought a new oil filter and fuel filter and new oil aswell so in the next few days im going to try eliminate all the problems and do the DIY as posted above (AAC).

just a quick question. Will turning down the boost with the Man boost controller make the turbo kick in later or what??? just make it less powerful? also will it save me more on fuel because im trying to make my car a bit less performance (still good) but just a bit cheaper to run for the time being.

Thanks :blush:

Well i just bought a new oil filter and fuel filter and new oil aswell so in the next few days im going to try eliminate all the problems and do the DIY as posted above (AAC).

just a quick question. Will turning down the boost with the Man boost controller make the turbo kick in later or what??? just make it less powerful? also will it save me more on fuel because im trying to make my car a bit less performance (still good) but just a bit cheaper to run for the time being.

Thanks :blush:

And sorry . How much would i turn it down by???

Well i just bought a new oil filter and fuel filter and new oil aswell so in the next few days im going to try eliminate all the problems and do the DIY as posted above (AAC).

just a quick question. Will turning down the boost with the Man boost controller make the turbo kick in later or what??? just make it less powerful? also will it save me more on fuel because im trying to make my car a bit less performance (still good) but just a bit cheaper to run for the time being.

Thanks ;)

turning down the boost wont really make it "kick in" later / earlier - it just means you'll hit your desired boost. Is it cheaper to run if using lower boost? In your case probably if its backfiring / running rich, your more than likely using more than required.

example - i tried 0-100km/h on 12psi - as soon as i hit 10-12psi the car pops/hesitates cant remember what i ran 0-100 was around the 6 second mark.. i turned the boost down to 9psi ran just as quick..

Not to sure what kind of manual boost controller you have, mine is a turbosmart one, from memory the rule of thumb is 1 rotation anticlockwise / clockwise is either -1psi or +1psi respectively. It should say on the top of your boost controller.

You catch my drift?

turning down the boost wont really make it "kick in" later / earlier - it just means you'll hit your desired boost. Is it cheaper to run if using lower boost? In your case probably if its backfiring / running rich, your more than likely using more than required.

example - i tried 0-100km/h on 12psi - as soon as i hit 10-12psi the car pops/hesitates cant remember what i ran 0-100 was around the 6 second mark.. i turned the boost down to 9psi ran just as quick..

Not to sure what kind of manual boost controller you have, mine is a turbosmart one, from memory the rule of thumb is 1 rotation anticlockwise / clockwise is either -1psi or +1psi respectively. It should say on the top of your boost controller.

You catch my drift?

Ok i understand. I have a turbosmart controller too. So your saying if i wind it anticlockwise and see how many rotations it goes down. It means thats what my boost was set on. So all i have to do is wind it all the way down. is that right?

What is the minimum i should set it at giving me good economy and still decent power. i mean the cars pretty much stock it cant handle a lot. But what should i set it on?

Sorry for all this trouble bro

Thanks a lot

on top of the boost controller does it have a little screw? it should say which was to turn will increase / decrease boost.

Dont wind your boost all the way down. Does your stock boost gauge still work? Just keep it at 7psi - i honestly cant feel much of a difference between 7psi and 10psi.. Might be a good idea to invest in a boost gauge, imo best to spend a little bit to get something thats fairly accurate / looks decent.

on top of the boost controller does it have a little screw? it should say which was to turn will increase / decrease boost.

Dont wind your boost all the way down. Does your stock boost gauge still work? Just keep it at 7psi - i honestly cant feel much of a difference between 7psi and 10psi.. Might be a good idea to invest in a boost gauge, imo best to spend a little bit to get something thats fairly accurate / looks decent.

Hey i just tried to wind it down.

You know how it clicks each time. Well i couldnt wind it down, because it looks like it had already been wound down all the way. it doesnt want to turn down. only up. so i assume its all the way down. and the boost gauge (stock). I took it for a spin and booted it, and it said it was boosted to 3.5. Right in between the 0 and 7. it wouldnt go further than the half way line.

Whats the deal with that???

:thumbsup:

just keep adjusting the boost controller - 1 click in the direction to increase boost. go take it for a drive, watch your boost gauge - it should go higher that 3.5 - just keep turning it up 1 click at a time until your boost gauge is reading close to 7. If at any stage you feel it hesitate/pop/feel underpowered - don't turn the boost up any more.. (you shouldn't have any problems hitting 7psi unless you have problems else where)

mate if your playing round with the boost, make sure you have an aftermarket gauge. and dont forget some manual boost controllers are prone to spiking. its not worth the risk

whats spiking?

when your boost exceeds what you want it to be... i.e 10psi on manual boost controller - boost gauge hits 20 psi.. thats an epic spike

Well i dont know what to do with my boost ive just left it what its on. Im too scared to muck around because i dont know about my boost gauge or if it works. My mate has an aftermarket one he said i could try and have. So were gonna test it on that another day.

probably best not to flog the car around then, buy a boost gauge, $100 bucks will get you something decent. Could save you blowing a turbo / damaging the engine which in that case will far exceed $100.

If you're after a cheapo (I've run one in the 33 for nearly 2 years now and it's never missed a beat), see my sig...

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

    • Even more fun, leave all the ADAS stuff plugged in, but in different locations, hopefully avoid any codes!   And honestly, all these new cars with their weird electronics. Pull all the electronics out Duncan, and just shove an aftermarket ECU and if needed a trans controller in, along with a PDM. Make it run basic but race car styled!
    • To follow up a question from earlier too since I had the front bar off again (fking!) This is what is between the bumper and the drivers side wheel And this is the navigator side, only one thing but its a biggy! So basically....no putting coolers in the wheel arches without a lot of moving other stuff. Assuming I move to properly race prepping this car I'll take that job on and see how the computers respond to removing a whole bunch of ADAS modules
    • So I prepped the car for another track day on Wednesday (will be interesting to see coolant temps post flushing out and the larger reservoir, with a forecast of 3-14 being 20o cooler than last time I took it out). Couple of things to mention; since I am just driving the car and not taking a support vehicle, I took the rear seats out and just loaded the back up Team Trackday style. Look at all that space! To cover off removing the rear seat....it is weird (note the hybrid is probably different because it wouldn't have folding rear seats) Basically, you remove the lower seat base, very similar to a r series but it is a clip that pulls forward to release the base rather than it being bolted down. Easy Then, you need to remove the side section of the rear seat on each side. There is a 14mm head nut at the bottom of the side piece, the it slides upwards off a hook at the top to release; you also need to unhook the seatbelt from the loop at the top. Then the centre piece is weird. You need to release/fold the seats forward with the tab in the boot on each side From there, there are 2,x12mm headed bolts holding the rear of each seat to the folding bracket, under the trim between the rear seat and the boot (4x christmas tree clips there, they suck). The seat is out but you can see where the bolts attach to the bracket
    • As discussed in the previous post, the bushes in the 110 needed replacing. I took this opportunity to replace the castor bushes, the front lower control arm, lower the car and get the alignment dialled in with new tyres. I took it down to Alignment Motorsports on the GC to get this work done and also get more out of the Shockworks as I felt like I wasn't getting the full use out of them.  To cut a very long story short, it ended up being the case the passenger side castor arm wouldn't accept the brand new bush as the sleeve had worn badly enough to the point you could push the new bush in by hand and completely through. Trying a pair of TRD bushes didn't fix the issue either (I had originally gone with Hardrace bushes). We needed to urgently source another castor arm, and thankfully this was sourced and the guys at the shop worked on my car until 7pm on a Saturday to get everything done. The car rides a lot nicer now with the suspension dialled in properly. Lowered the car a little as well to suit the lower profile front tyres, and just bring the car down generally. Eternally thankful for the guys down at the shop to get the car sorted, we both pulled big favours from our contacts to get it done on the Saturday.  Also plugged in the new Stedi foglights into the S15, and even from a quick test in the garage I'm keen to see how they look out on the road. I had some concerns about the length of the LED body and whether it'd fit in the foglight housing but it's fine.  I've got a small window coming up next month where I'll likely get a little paint work done on the 110 to remove the rear wing, add a boot wing and roof wing, get the side skirt fixed up and colour match the little panel on the tail lights so that I can install some badges that I've kept in storage. I'm also tempted to put in a new pair of headlights on the 110.  Until then, here's some more pictures from Easter this year. 
    • I would put a fuel pressure gauge between the filter and the fuel rail, see if it's maintaining good fuel pressure at idle going up to the point when it stalls. Do you see any strange behavior in commanded fuel leading up to the point when it stalls? You might have to start going through the service manual and doing a long list of sensor tests if it's not the fuel system for whatever reason.
×
×
  • Create New...