Need urgent help!!!!

[MR_304]

Gday people, i recently have had a stalling issue with my car, whilst driving it starts to choke, the revs drop and most of the time it stalls.
I have replaced the following items on my car
FUEL PUMP
FUEL FILTER
HEAVY DUTY IRRIDIUM PLUGS
8.5 TOPGUN LEADS
MSD IGNITION
HSV MEMCAL 169kw-215kw REARS
BOSCH COIL AND REPOSITIONING
yet still have the same problem.
Once the problem is occuring the engine fault light comes on and yet does not store a fault code within the ECU. has anyone had this problem?, and if so could you give me some idea's on what you think it might be cheers

[304runner]

Check your vaccume lines, sometimes they have spits in them, I use areo-start or start ya bastard to spray lightly over the lines and if the revs pic up you have found your leak.

But it could be something else, have you twisted the dizzy by any chance? This can advance or retard your timing or it could even be your injectors...

And install the stock memcal if you have it still....