R32 Misfire And Stalling Problem

[PLEEZN]

i have a r32 (rb20det), it runs perfectly fine for the first 10 - 15 minutes of driving, then starts missing bad at low rpm and stalls at idle then wont start, but will start after 5 or so minutes but runs really really crap. im not sure if its the crank angle sensor, coil packs or the ignitor module. anyones opinions will be much appreciatted. thanks in advance!

[Noy]

have you checked your AFM?(air flow meter)

[PLEEZN]

no i havent. wouldnt it miss all the time though, even when its cold if it was the afm?