R33 Rough Idle And Stuttering

[Ki_spirit]

Hi Guys.

Hopefully someone can point me in the right direction of solving such a seemingly insignificant problem.

Car: ECR33 GTS-T 186XXX km's, running 10PSI with bleed valve, Simota Pod filter, Gearbox Oil and Engine Oil + Filter changed less than 500kms ago.

When stepping on the pedal from idle lightly, the engine stutters roughly and then raises smoothly. The injectors tick/ tap like crazy and seem to have gotten louder in the last 1000kms and wasn't rectified when changing the oil? - if that matters at all.

When cold and gradually accelerating from 1000rpm to 3000rpm the car feels like it jutters forwards sometimes, like inconsistant power and is spasmodic in nature and minimal.

I don't have any experience with altering timing etc. but from what I have read I think this may have something to do with it. Also, the injectors are original and I have run Nulon fuel system/ injector cleaner through with a slight difference. Plugs have been cleaned and are not fouled up. Coil packs have been cleaned up and sealed using epoxy resin to cover cracks etc. with no misfire on boost I have cleaned the AAC valve and this has done nothing at all.

According to the previous owner, the O2 sensor in the dump pipe has been replaced - it doens't look like the original, although I am sure that the sensor in the cat has not been replaced.

Please help anyone! -

[bumble_bee]

its a general skyline problem..

u'll get use to it..lol

but below are just some fix.....

try cleaning ur iacv..using some good carby cleaner/throttle body cleaner.....

that made alot of difference on most people skylines...

and also try cleaning ur afm out..using a good electrical cleaner....

other than that theres not much else you can do...

check ur spark-plugs...make sure there regapped to 0.8mm...

make sure u dont have any vac. leaks...

and have u got the standard blow-off valve?? atmo bov causes idle issues...

and last but not least get a tune...

hope this helps

[Ki_spirit]

'bumble_bee' - Thankyou very much for the reply. I will check my bov - apparently it has been modified in some way and I will make sure I check the plugs as well - they are at 1.1mm. I will be getting a tune done too I think

If anyone else can help, I would be greatly appreciative.

Thanks.

Edited May 29, 2008 by Ki_spirit

[arbess]

ki_spirit,

curious, have you ever and be honest, used ethanol fuel in the car?