thanks to everyone for their help & advice
i've already sprayed the AFM with "mass air flow-sensor cleaner"
[got it from supacheap $20]
apparently u can use carby cleaner instead
ill get stuck into next weekend as the cars not being used atm
been drivin the neanderthol toyota work van during the week
i did have a go at cleaning the AAC(Auxiliary Air Control)valve last week but didnt completely remove it so it wasnt done thoughly
thanks for the link[to removing it,etc]
ill give it another go
PS-carby cleaner smells good-kinda sweet
it idles at about 1000rpm for about 10 mins then drops to 700rpm
runs smooth as above idle speed
my mechanic suggested it could be either a faulty airflow meter or
faulty/leaking vacuum hose/s [it could be 1 of a 100 different things unfortunately]
gonna to blast out the air-idel motor with carby cleaner asap & replace sparkplugs too
My stock standard rb25-det runs smoothly until after about 10 minutes it starts to lose revs & the car shudders randomly-but only while its ideling
it doesn't stall either but feels like its going to
i've been running it on BP ulitimate-added injector cleaning fluid to fuel & cleaned the airflow meter but no luck
has anyone else had a this problem before?
any advice will be appreciated