Very Rough Idle - Help Me Please :(

[tripsteady]

Hi guys

So I bought my first skyline about 2 weeks ago. It was flawless , everything worked and I couldnt be happier (almost)

I decided I wanted the induction sound , so after doing some research I found that you could

- put a pod filter on

- block off bov

I read that blocking of the stock bov causes idle and stalling problems but fitting a pod filter should do nothing but lean it out slightly (which is ok since these cars run pig rich from factory) and add the induction noise.

So I fit in a el cheapo "Calibre" pod filter from Supercheap(my Apexi that i bought didnt have the adapter for the afm). It seems to work great , same performance with added noise.

After a day of driving around I noticed that the car shuddered quite badly when cold and under 900 revs and I felt a great loss of power.

If I gave it WOT it hesitated before it dropped down a gear and took off but is extremely sluggish

After about 10min after the temp gauge goes halfway the problem seems to fix itself , the revs rise to around 900 and everything is fine again.

I immediately took the car home , took the pod filter out , made sure everything was tight and put my stock air box back in. Seemed fine at first but problem appeared again.

Its idling at 650 revs , not dropping below that but the rb sounds almost like a boxer engine when its doing this and im accelerating.

used to do it when cold , now does it almost all the time , warm or cold (but always when cold)

Ever since then the problem appears more regularly and doesnt even stop when engine is warm anymore ( did it on the entire 45min drive to work this morning)

Its almost to much of a coincidence that something else broke around the time I fit my pod filter so i'm thinking it has something to do with the afm/intake to the turbo

I gave Paden from Unique Automotive a call and he asked if the Calibre filter was oiled as this causes issues with cars with afm's ( i remember reading this before).

I gave supercheap a call , but they said the filter is not oiled....but they arent mechanics....

At this point I want to swap my AFM with someone else to see if thats the problem.

Also want to make sure the intake is on the turbo correctly and there are no splits in the intake pipe

Is there anyone with an r33 gts25t s2 in Sydney that is willing lend me their afm for approx 10min for me to swap over? I live in Hurstville ,Sydney. Want to try first before i got out and buy a new one...

has anyone come across anything similar before? Would the ecu need to be reset since Ive swapped filters twice now(stock box is on atm)

Thanks in advance , any help appreciated

Edited June 21, 2012 by tripsteady

[tripsteady]

anyone ?

[tripsteady]

just to let you guys know , these symptoms point towards car running on only 5 cylinders(gives the car that boxer rumble)

paden diagnosed it as soon as i pulled up , left the car with him today , will see whats up when I pick it up after work.

[iwanta34gtr]

I'm no pro, but from what you have mentioned i'd suggest you clean your AFM as first point troubleshooting.

Symptoms though point to this being coincidence and potentially one or more of your coil packs or plugs have failed. When were your plugs last done?

If you have the car at a mechanic, also get a standard smoke test done to check for leaks / cracked hoses / gaskets that are not visible.

The simple things first. Hope this helps a little bit.

[iwanta34gtr]

And no, I dont think resetting your ECU would provide any benefit.

Good luck mate, hopefully you get it sorted nice and quick.

Edited June 22, 2012 by iwanta34gtr

[tripsteady]

And no, I dont think resetting your ECU would provide any benefit.

Good luck mate, hopefully you get it sorted nice and quick.

I'm no pro, but from what you have mentioned i'd suggest you clean your AFM as first point troubleshooting.

Symptoms though point to this being coincidence and potentially one or more of your coil packs or plugs have failed. When were your plugs last done?

If you have the car at a mechanic, also get a standard smoke test done to check for leaks / cracked hoses / gaskets that are not visible.

The simple things first. Hope this helps a little bit.

And no, I dont think resetting your ECU would provide any benefit.

Good luck mate, hopefully you get it sorted nice and quick.

thanks for the advice man. going to see paden now , will update then...yes he said its a coincidence , had nothing to do with the pod afm etc. most likely coils are screwed.

splitfires here I come ....

getting 100 000km major service done shortly and see what else needs to be done ...