Problem Diagnostic Help

[midnight]

Hi guys ive got this strange problem which has me stumped...

car is an s13 with an rb25det s1, gt3040, z32, pfc.

the problem is intermittent. it started happening after doing 2 drift days in a row, . I cant make it happen on cue, it just does it randomly, was happening every few minutes on the track, but didnt seem to happen on the freeway home.

i will be driving, and all of a sudden the motor will be unresponsive, the revs will start to fall as the car slows down, and if i clutch in the revs drop off and the car stalls.

if I press the accelerator, vacuum comes up to zero. but there is no response from the motor,

it is not misfiring. its like its not firing at all.

after about 20 seconds, the motor will suddenly kick back to life, and I can continue driving.

a mate was following me, and he didnt notice any black smoke.

any ideas on where i should start looking.

thanks in advance

Edited January 6, 2010 by midnight

[SECURITY]

check things like a crack/split in your intercooler hose, look closely though.

afm (if you're running a map sensor id be almost certain youve got an air leak somewhere)

give that a go.

[JonnoHR31]

check the cas plug aswell. if you have a hand controller does it show you anything out of the ordinary?

Edited January 6, 2010 by JonnoHR31

[Flargh!]

Stupid question, but i assume you had a full tank of gas and you weren't starving the fuel pump when you went sideways lol?

[midnight]

its not boost leak nor is it fuel starvation. always keep minimum half a tank gas, the problem happens under normal driving also, and off boost.

ill have to do a test and see if the hand controller shows anything/

Edited January 7, 2010 by midnight