***help*** Random R32 Gts-t Problem!

[YSR020]

Hey Guys,

Not sure if this is in the right area but I have a random issue with my car and no one seems to be able to isolate it? Its been to two mechanics about half a dozen times in total, we've changed a few bits and pieces but still happening! It went to one mechanic 4 times before he 'witnessed' the issue...to give an idea how random it is...

It's an R32 GTS-t manual, only mod is a muffler (came with the car). The issue I am having is really random...most of the time it runs fine...but sometimes it would stall, the idle would rise & drop all on its own or the idle would rise to about 2500rpm and stay there...it's really odd...it doesn't do it all the time or even consistently. The ONLY clue is it tends to run worse the less fuel it has - but that could just be a coincidence. I've had the car serviced with platinums to be sure...the AFM checked and recently my mechanic replaced coil pack 5 as it was 'burnt' out? - but its STILL doing it...? Any ideas?

Edited June 18, 2006 by 4doorHCR32

[danielson]

Hey Guys,

Not sure if this is in the right area but I have a random issue with my car and no one seems to be able to isolate it? Its been to two mechanics about half a dozen times in total, we've changed a few bits and pieces but still happening! It went to one mechanic 4 times before he 'witnessed' the issue...to give an idea how random it is...

It's an R32 GTS-t manual, only mod is a muffler (came with the car). The issue I am having is really random...most of the time it runs fine...but sometimes it would stall, the idle would rise & drop all on its own or the idle would rise to about 2500rpm and stay there...it's really odd...it doesn't do it all the time or even consistently. The ONLY clue is it tends to run worse the less fuel it has - but that could just be a coincidence. I've had the car serviced with platinums to be sure...the AFM checked and recently my mechanic replaced coil pack 5 as it was 'burnt' out? - but its STILL doing it...? Any ideas?

vacuum leak causes this, or a hold on the rubber front pipe on the turbo AFTER the afm could be leaking.. sounds exactly like the problem i had. ended up being a hole burnt thru the feed pipe to the turbo... in otherwords, the engine is getting more air than the afm is reading, running super lean, and on idle can stall, and vary revs constantly

[YSR020]

Thanks Dainelson, I'll look into it! - altho I'm thinking it's something a little more significant than that...I'll pull the intake out and have a looksy...

Any other ideas guys?

[ToF]

The revs hunt when you run the car with a huge vacuum leak after the AFM. So look around for any leaks as suggested above.

[YSR020]

****UPDATE****

Now we have a new element to the problem! - the car won't rev past 2500rpm...and when you press it past that point, it sounds/feels like its hitting the limiter...?? - this is particularly annoying on the freeway...as 2500 in 5th is about 75-80km...still sound like a post-AFM leak?

I'm pulling the intake out this weekend and having a good look at it, any further ideas won't hurt...

[nizmo_freek]

Unplugg the oxygen sensor and see if it fixes the problem (leave the oxygen sensor in the dump pipe), if it fixes the problem then you have a stuffed oxygen sensor, i had a simillar prolem with my car a couple of weeks ago.Let us know if it fixes it

Edited May 19, 2006 by nizmo_freek

[YSR020]

Thanks mate! - I suspected the ozygen sensor...I'll get onto it this weekend and let you know how I go...thankfully I don't have to rely on it for daily transport anymore...

Cheers,

Chris

[YSR020]

Hey all...I checked the inlet side and everything is fine...it started to play up again so I disconnedcted the o2 sensor and it drove perfectly for about 150km but now its doing it again...??? Could this still be the o2 sensor? I might try with the multi meter...any ideas would be great...BLKGTS4R32 pm'd be as he's having the same issues!!!

[(oo\__4Door__/oo)]

yea mines doin that shit 2....

howd u cheak ur afm?

[YSR020]

I basically pulled the whole inlet out and checked for leaks..(as suggested above)...everything is fine...I didn't check the AFM as such...that said, I have a Q45 on the way for it...I am suspecting its the o2 sensor...but would rather be sure as I've spent 4-500 already 'chasing' this thing...

Also, R32 GTS-t o2 sensor can only be purchased thru Nissan I am told? $165.00 + GST...

[sigsputnik]

i guess i'd just reiterate that the afm could still be to blame, at least in part - if the circuit board inside the housing is cracked, the circuit could still complete at certain times (e.g. going round a corner). mine was like that too.

[-NismoR32-]

my mate had this type of proplem, change the ECU and AFM and see what happenes. I'm sure that some1 could lend u those parts.

PS. i have an ECU if your in melb.

Edited June 18, 2006 by -NismoR32-

[YSR020]

Thanks guys - much appreciated!!!

Nismo I AM in Melbourne, I have an AFM on the way (doing a 'round of mods atm - FMIC, 2535 etc) and I am planning on getting the ECU remapped - would this help? ie if there is an issue with the ECU, will a re-map correct this? Also - and apologies for being off topic - can you suggest anyone skilled in the art of re-mapping? I want to retain the factory ecu...

Edited June 18, 2006 by 4doorHCR32

[-NismoR32-]

RE-mapped ECU woudn't help if the ECU is dead. and "can you suggest anyone skilled in the art of re-mapping?" Nope the stuff i've heard abuot ppl in melb remapped stock ecu not good.

Thanks guys - much appreciated!!!

Nismo I AM in Melbourne, I have an AFM on the way (doing a 'round of mods atm - FMIC, 2535 etc) and I am planning on getting the ECU remapped - would this help? ie if there is an issue with the ECU, will a re-map correct this? Also - and apologies for being off topic - can you suggest anyone skilled in the art of re-mapping? I want to retain the factory ecu...

[YSR020]

Yeah I am with you on both counts - I'll change the AFM if no luck I might PM you about that ECU...thanks heaps mate!

[R32FOURDOOR]

I think that you may have the problem that i had with my r32

Does ur cars rpm "hunt" ie. the revs go up and down when u stop or start it up ?

Does it idle at like 2000 to 2500 RPM once it stops hunting.(if it stops hunting at all)

I had this issue with my car and i tried everything to fix it but in the end it was the Cold Start Solenoid. Located just under the cross over pipe, between ur intake plume and the cam cover. It will look like a thin square "floppy disk" shaped object with two pipes going into each side of it, my guess it that it is this.

Rb motors are very prone for stuffing up this part. get a new one Not a second hand one cos you will probably have the same problem.

Hope this helps.

[YSR020]

Thanks R32FOURDOOR (and awesome choice in vehicle might I add... ) - I thionk I have found the solution!

BLKGTS4R32 came good with this link;

http://www.skylinesaustralia.com/forums/in...opic=113284&hl=

I've given it a shot and will be putting it all back together tomorrow for a test...fingers crossed!

[MerlinTheHapyPig]

you need to borrow an rb20 afm and test it. I wouldn't try tuning the car if you can't locate the problem first because it will affect the tune.

Sounds like an Afm related problem to me...

[R32FOURDOOR]

I had this problem that things i changed were:

AFM

TPS sensor

Adjusted idle screw

Cleaned out trottle body+butterfly

Cleaned AAC valve

Reset ecu

took air filter off(HKS TYPE)

Changed that solenoid on the aac valve(gold round thing on back of intake plume)

Changed oil

Changed coolant

cleaned everthing that i could

None of this changed my problem at all

In the end was Cold Start Sensor, im pretty sure that this is ur problem

Heres some pic of where it is.

Ps ill try and also get part no of it

[YSR020]

Thanks all - just clocked over 1000km with my backyard modded AFM and it works perfectly! Thank you all...much appreciated!!!