Backfiring, Now Wont Start

[skyman]

hi guys any help or ideas would be great.

S1 r33 gtst, that has never missed a beat, a few days ago it started to violently backfire

under any throttle. and once the car was turned off it wouldnt start again.

it turns over fine but will backfire (one massive backfire) during it being turned over??

just put new plugs in still wont start

i have PFC and AVCR all the sensors are working everything looks normal

i also have 12 month old splitfire coils

i have fuel pressure and fuel pump is working

not sure wat else it could be??????

[abu]

Sounds like your CAS is dead

[The Dan]

or air flow meter.

or pipe blown off

[zebra]

or air flow meter.

or pipe blown off

[webber]

second CAS dead, i once had one snap the shaft where the pin goes through, it would jump in and out of the correct position(well where it broke), pulled it out oneday and it was in 2 parts, but had had it apart a week before and it was together, but it was definatly the problem.

[Taso84]

sounds like afm to me

[skyman]

cheers guys.

ive had air flow meter problems before as well as intercooler pipes coming off,

but the car has always started even without the airflow meter and with intercooler pipes

blown off...

ill check the cas this weekend but how would i know if its broken if its not cracked???

[skyman]

i couldnt wait till the weekend lol

anyway the cas imput shaft ( half moon thing) looks like its snapped.

does anyone know of the correct way to relpace the shaft or do i need a

new cas???

and does the shaft come from the sensor or from the cam?

thanks agian for the great help guys!!

Edited April 2, 2009 by skyman

[abu]

Shaft is part of the CAS