Hi all,

 

I thought my AFC would sort out my stalling problems (after high revs and loud dump from bovs, the revs drop right down into a couple of hundred and sometimes it stalls) - but it didnt :cry: :mad: .

I was just in an enclosed driveway where i could hear the car well, revv'd it up to about 3000, then let off the gas. the revs dipped down to about 400 then climbed back up, but i noticed for the first time that while the revs were down there, i could hear a buzzing from the back of the car which im 90% sure is the fuel pump (i hear it for a second or two every time i fire up the ignition then it stops). the buzzing definately starts and stops while the revs are dipping low - its not that the sound is there all the time but is blanked out by the engine noise.

Would this (ie the fuel pump) have anything to do with my stall problem? Any ideas? I'm getting desperate! :(

When did the BOVS go on? I am sure if they are not on correctly or are leaking, they will cause the car to stall

I had a similar prob with my pump which was really bad, it buzzed when you turned the ignition on and like you say, drowned out by the car running.

The probs I had were that the car stuttered when giving it a bit of abuse, I noticed no drop in revs like yours,

I hope you find the prob.

theyve been on for about a month. im positive theyre on properly and theyve been checked by an expert. no leaks either.

the stalling started happening as soon as i fitted them, and word went around here that the ecu over-fuels because it doesnt realise the air has dumped (instead of recirc'd) so it runs rich for a sec and causes a stall or near-stall (basically the more i rev, the more likely it is to drop and stall). an apexi super-afc2 is supposed to help fix that so i had one installed but its not really helped,

but it was only this morning that i noticed the buzzing sound when the revs dropped low.

If its within 30 seconds of starting the car or if the coolant is less than 10 degrees then the fuel pump will be running flat out. In this case then you will more than likely be able to hear it so this could be a coinsidence ;)

i hear it for a couple of seconds when starting the car andy, and come to think about it for a couple of seconds after turning ignition off. but this is the first time i heard it during driving (well, parked up at least).

its not really the buzzing, its just the darn stalling thats driving me loopy!

Could well be worth resetting the base idle now the BOVs are on. Remove the connector for the idle valve and set the revs to ~650 rpm - see how you get on...