Stalling After Start Issue Issue

[TUF250]

Hi all,

I have an R33 GTS-t with the following work done. 3inch turbo back exhaust, K&N pod, r34 GT-T cooler.

I have done the following service items

- timing belt, tensioners, seals

- new plugs bcpres-11 (gapped to 0.9)

- cleaned AFM (several times)

- cleaned all induction piping

- new o2 sensor

- cleaned AAC valve

- oils etc

Now the car usually runs really well

Recently it has developed what can only be described as R&R mode however the car is on stock boost (as confirmed by an aftermarket boost gauge) Interestingly the car also maintains 7psi at full throttle even though everyone isists it should spike higher with these mods...

I assumed I had an over sensitive ECU and it was hitting R&R due increased airflow.

That was until someone suggested it might be sensing detonation and going into a conservative fuel map. This scared me!

So I will check that the knock sensors are connected (a problem that I read during a serch that caused this)

Just on the odd occassion the car will start fine (first start in the morning) then stall, and yes I gave it time to prime. The car will then start normally.

What would cause this? Fuel Pump? Dead AFM? Would it be anything that would cause my strange R&R at standard boost problem?

Now if it is fuel pumps can someone suggest the part number for the common recommended pumps (bosch, walbro, tomei etc) their part numbers for the ones that bolt in, no mods required. Looking for capacity to run about 10-12 psi tuned with the above mods. Also would appreciate any recommended places in melb for getting these at a good price

Thanks!

Edited August 12, 2010 by TUF250

[jarrod83]

Heres the tomei fuel pump for a r33 gtst on nengun. http://www.nengun.com/tomei/fuel-pump-niss...yline-r33-gts-t I bought one after i ditched my walbro, when i thought it may of been causing problems, they are pretty easy to install but a bit of overkill for what you want. A bosch 040 is easy enough to install and roughly about half the price.

What boost gauge are you using?? mine was getting a couple extra psi after i installed a full exhaust and was getting a little extra at night. Im not sure if it went into R&R if it would cause less boost?? Unless it was stupidly rich.

Jarrod

[ClutchBurndout-:(]

so what is actually happening when your driving under boost?

[TUF250]

it just feels flat, no missfire no pop crackles, nothing. Its smooth as silk. However its down on power. When I reset the ecu the other day it went back to its normal self and was gre4at but by the following night it was 'flat' again. So just chasing the fault.

I just have a calibre digital boost gauge. shows 5 to 4500rpm then 7 so seems accurate, the car just isnt spiking. Not sure if the car stays in R&R mode once it happens or if it resets after you shut the car off?