tickover lumpy and wont rev ??

[crazyenglishman]

ive got a 325i and it will be running fine 4 weeks then out the blue i loose all power and it will tick over really lumpy and when i puch the throtle nothing happens then will will rev up 2 6 grand then drop again?
2day it has done it 4 times 2 me. each time lasting 5 min or so. if i leave my foot on the throtle the revs will rise every few seconds the drop straight back down?
Any ideas?
hope this has made some sort of sence lol

[Ant]

check the crank sensor dude, they have a habit of chafing their insulation off on the waterpump pulley and can cause all you've desribed.

next stop, blue thermo sensor( just cahnge it , cheap enough dude ) then you're onto tracing any air leaks.

TBH though, sounds electrical to me from your description.

[crazyenglishman]

cheers buddy will check that in a bit

[crazyenglishman]

no split wires there at all. could it be the crank sensor its self playing up. ive just had the car running 4 half hour n it not done it tipical!
will change the blue switch this week end

[rallyman1984]

Air Flow Meter Possibly ? As when i accidently forgot to plug mine in, it wouldnt rev. (on E30 M3 tho)