Busted R34 Gt4

[R34GT4RACER]

could anybody please tell me whats wrong with my car!

i used to be the proud owner of a great R34 skyline but now it's just a pain in my ass. this problem started up by just being a slight drop in revs when pulling away from stand still but now it's so bad that when i put my foot on the accelerator, the revs just hit the deck causing the car to sputter and in some cases die all together. when the motor does cut out it takes atleast 20 turns of the key to start it again. obviously this is not exactly what you'd expect from a rev happy RB motor.

this problem occurs in neutral and all gears, the motor is fine at idle (usual 1000rpm), the idle is as smooth as the day it rolled of the factory floor, engine could idle all day but it's only once you push on the accelerator that the revs head south fast

these are my cars specs and the things i've already checked,

R34 GT4:

1998

non turbo RB25

4wd

original 60 000KMS on the clock

i've owned the car for 2 yrs and i'm the only owner of the car since it landed in oz

Mods to date:

2.5 inch cat back exhaust

K&N pod filter

Spitfire coil packs (originals gave out the week after i bought the car)

this car is pretty stock standard and that includes the ride height

Things already checked:

catalitic converter - not collapsed

spark plugs - brand new bosch platinium

oil - new bottle of motuls finest when changing spark plugs

pod filter - cleaned whilst changing spark plugs

gearbox - working 100%

engine management - diagnostic computer was run on the car by a professional auto electrician and there is no check engine light on in the dash once the car has been started

any sugestion on what to check next before this ends up costing me a kidney on the black market to fix it

Edited February 19, 2009 by R34GT4RACER

[ylwgtr2]

try looking at the coil packs even tho youve changed them.....try a set from a known good running car

Edited February 19, 2009 by ylwgtr2

[ylwgtr2]

also get someone to put a fuel pressure tester on it

[R34GT4RACER]

thanks for the ideas, i'll try em this weekend

[MrNeil]

tps calibrated right? afm working correct ?

[br3ndan]

sounds like a fuel issue to me.

Get ur fuel pump checked out...

[Murry33]

fuel issue i reckon, otherwise check your earth grounding from your battery. my friend had a similar issue on his soarer anyway..

[blind_elk]

Try replacing the fuel filter.

[R34GT-t_07]

it could be ur Throttle-body if its cutting out when u step on the accelerator. also check ur coilpacks and ur fuel preassure ur fuel filter could be clogged up.