s1 R33 with 150000ks on the clock
original coils and afm, powerfc and 200rwkw
iridium sparkplugs put in around 70000ks
bosch o2 sensor put in 6 months ago, works fine
12month old walbro fuel pump which hasnt given any trouble yet either
no previous issues, until last week, noticed slight hesitation/miss cruising on highway around 2500/3000rpm
back driving around town it occasionly shows up, only when car is warm and so far only at cruising throttle, never when getting some stick
the other nite driving home from work, was large hesitation, car felt like it was going to stall at 60km in 4th
then just stopped and was able to drive home normally
later that nite, car started, drove into street and then hesitated, died completely
would start, and just stall straight away
this happened for about 5 minutes, before i could get the car started, got the car reving and got home
left it out over nite
started fine the next morning, drove it to my mechanic, where it refused to play up at all
got a diagnostics guy out, he coudlnt find anything wrong
mechanic seems to think its afm playing up?
there doesnt seem to be anyway to make it play up, still goes good when booted, and happily cruises along 99% of the time as well
anything i can look out for on the pfc hc to try and determine whats happening?
thinking maybe fuel filter?
anything else it mite be that i can get investigated?