Strange Surging Problem

[SOB]

Just a thought but have you checked your coil packs. Your symptons sound silimar to my surging problem some time back.

Changed them out & no problems since.

Just my 2c worth. Cheers Shane

[NYL83R]

Yeah I did check the coil packs when i changed the plugs. When I had my Skyline, I had a hesitation problem when the car reved to around 5k, that ended up being hairline cracks in teh coil packs... but this problem is different.

[frigjam]

To eliminate other problems and confirm its a 4WD system issue, do the 2WD trick. It's on here somewhere, from memory unplug the atessa bleed connector, start car, pump brake pedal 5 times. 4WD light on the dash should constantly flash... There's no need to remove driveshafts etc. If the problem is still there, its not the 4WD system.

[KiwiRS4T]

thanks for the help guys. hmm I don't hear any clicking paul, would it be a noticable clicking when the problem starts? Yes the whole car jerks slightly. It could be my imagination, but since having this problem the car seems to have slightly less power overall? i'll investigate further. Could very well be the k&n oiled filter i have, after hearing what people are saying. I've had the filter in for a couple of years though before it started having this problem

I'll try unplugging the 02 sensor if you think it might help bob, otherwise I will take you up on that offer please. can you pm me bank details. cheers

PM sent

[NYL83R]

I tried 2WD mode on the weekend, and no change.... although probably unrelated, the car seems to be having the surging problem at lower speeds now (60-70km/h) this was still after I put it back to 4WD. Problem seems to be getting worse.

I guess next thing to try is another AFM (from Bob. cheers ) and replace the k&n filter for a paper one. Damn I hope that works.....

Edited August 14, 2011 by NYL83R

[KiwiRS4T]

I used a Pipercross filter for a couple of years no problems PX-PP1128 (same as Evo or WRX can't remember) google for your nearest stockist. in Aus.

[Stagea1]

Hey mate I'm not sure what troubles you are having but my stagea was choking and not running good. I just it it back yesterday and it is flying. The problem i had was the spark plugs weren't put in the right amount. I cleaned my afm last week and that wasn't he problem. So maybe get ur sparks in properly. are u loosing boost? Got a gauge?

[NYL83R]

changed the AFM and Air filter to a paper type.... no change, problem remains.... I've already tried puting it in 2wd mode, but i'm still thinking there could be something wrong with the atessa maybe? any ideas on how I could check it, or who I would take it to?

Edited August 28, 2011 by NYL83R

[KiwiRS4T]

Did you succeed with the 2wd trick? If not its just 4 bolts to drop the front driveshaft and pull the fuse.

If you are really keen you can pull the lining out of the left rear of the boot. The Atessa computer sits between the small hatch in the side and the lh strut tower and has a blinking light to display fault codes. I don't know why Nissan installed it so you can't read the fault codes - in the Skylines its in the boot under the parcel shelf where you can see it.

Did you try disconnecting the O2 sensor? Just pull the plug off.

Maybe there is cr*p in the sock on the fuel pump. Either you can pull it out and have a look or if you have access to a workshop they should be able to test fuel flow with a meter.

[NYL83R]

i tried 2wd, but did not drop the front driveshaft... according to the instructions (unplug the atessa bleed connector, start car, pump brake pedal 5 times)

where is the 02 sensor?

interesting that the atessa is a seperate computer with seperate fault codes... could be why no faults were found when i did a code check?

[KiwiRS4T]

On the S2 it is supposed to be not necessary to drop the front drive shaft - I only mentioned it in case you couldn't get the other way to work. The O2 sensor should be on the front (exhaust) pipe just below the turbo. There is a bracket to hold the wiring and if you follow the wiring about 150mm back from the top of the sensor you should find a plastic plug. Just disconnect it - no harm will come to your engine -and see if it makes any difference. If it does there is a "how to replace" in the DIY section above and you can get replacements from Kudos - link in the DIY sticky.

[NYL83R]

thanks, i'll check that...

[czeno]

My car behaved in a similar manner for awhile (S1). I'd feel a slight hesitation at constant 100kph every so often, wtf is that motor or drivetrain? I'd think to myself. One day not long after the gremlin made it's appearance. I was slowing down for an intersection and felt the car engine brake more for a moment then off again. The 4wd light came on and about a km later limp mode kicked in. Oh dear I gots me a piece of shit I thought ( I didn't know about this feature).

To cut a long story short it was just low on atessa fluid, the greatest discovery being that like an auto trans you gotta check level with motor running. I get the feeling the car applies a bit of front drive on deceleration, a little free braking as it were. Hence the problem setting off the alarm bells when front drive would apply then change it's mind about it. Lack of clutch pack pressure I guess.

Please disregard all of the above if you have covered this base, just don't like to see ya suffer. I have a low tolerance for the bastards misbehaving.

[NYL83R]

thanks for the suggestion. the car did go into 'limp mode' a while back (seemed to be stuck in 2nd or 3rd gear) It hasen't done it again since so i thought it was just a one off thing....

Attesa fluid level hmmm. I have not checked that... where is it located and what do you top it up with? In the meantime I'll do some searching and sus it out...

found this interesting video about the Attesa System:

Edited September 1, 2011 by NYL83R

[KiwiRS4T]

Attessa reservoir is in the boot right-hand side - open the door and fill while running. If it has gone out of sight the system needs bleeding (one nipple behind the transfer case the other on top of the diff ...not on the diff itself but on the attessa pump).

Use high quality (I use synthetic) atf fluid.

[NYL83R]

cheers. yeah i've wondered what that was.. makes sence now....

[NYL83R]

thought i would give a quick update... I bought a Consult adapter and conected to my laptop.... And got a fault code of 33 (Heated oxygen sensor) so looks like that is the problem. Buying one today to find out if that solves the problem.

[NYL83R]

SO.... hoping someone can help me find the right/best price 02 sensor... I've been reading up in the threads already made, but am a bit confused....

do i need to buy this one?

http://www.kudosmotorsports.com/catalog/nissan-lambda-oxygen-sensor-genuine-nissan-skyline-r34-25gt-25gt4-25gtt-stagea-wgc34-rsv-stagea-wgnc34-rsfour-series-p-187.html

or can i get this one?

http://www.ebay.com.au/itm/NEW-3-Wire-Universal-Oxygen-Sensor-O2-Easy-Fit-Kit-/120737660086?pt=AU_Car_Parts_Accessories&hash=item1c1c867cb6#ht_3120wt_1244

or in the other 02 sensor thread guys were talking about a $77 NTK one from kudo?

Edited December 5, 2011 by NYL83R

[NYL83R]

Its been a while, but thought I would share the fix to this problem in case anyone else was suffering from the same issue.

Basically it was the tyres. I had miss-matched tyres front and rear (fronts matched. rears matched) same profile (205/55/16) but different brands. I was trying to get by on 2nd hand tryres till I could get a new set of rims.... But I ended up putting 4 new tyres on, and bingo the problem went away. Better smoother exceleration also.

Was suggested to me by SOB that it could be the tyres... cheers mate

[XRATED]

Sorry I didn't catch this earlier...

Ive had the same issue with the same fix. Same size tyres, new, different brands. Had surge issues.

Cheers

Justin