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Model specific boards => Golf mk3 => Topic started by: Turbotezz on 17 October 2012, 20:59

Title: Sounds like exhaust blow, but it isnt (seems common) AGG
Post by: Turbotezz on 17 October 2012, 20:59

Ok, I've tried many things and looked in many places but still cant find an answer.
2.0l 8V AGG in mk3 gti
Under any sort of load, i get what sounds like an exhaust blow from near an exhaust port. Sound doesn't really vary in serverness under light to high load. happens from cold to full temp (all the bloody time).

Have tried the ignition timing, no change
Ran a BG44K to clean the engine, no change
ran it on VAG-COM

Got the master tech to look at it at work. He seems to think it could be turbulent air with something to do with the charcoal filter.

I have googled it many times and found plenty of threads with the same symptoms and no outcome or answer.
I don't want to just live with it. Its 100% not an air leak in the exhaust, no cracks in the manifold, no leaks from gaskets.

Pleease if someone has had this problem and found a fix, do tell :cry: 

Title: Re: Sounds like exhaust blow, but it isnt (seems common) AGG
Post by: Screech16v on 17 October 2012, 21:36

I know the noise! iirc  it was a pipe off the canister ,was a loud ticking noise,this was on a vr6 though

Title: Re: Sounds like exhaust blow, but it isnt (seems common) AGG
Post by: sharki786 on 17 October 2012, 23:48

same here!!! :angry:

Title: Re: Sounds like exhaust blow, but it isnt (seems common) AGG
Post by: thai-wronghorse on 18 October 2012, 00:00

Double check the exhaust manifold, they commonly crack on these and cause irregular and hard to find irritating noises.
As for the carbon canister - bin it!

Title: Re: Sounds like exhaust blow, but it isnt (seems common) AGG
Post by: sharki786 on 18 October 2012, 02:22

stupid question, but what does it do and any guides on here on how to get rid of it?
Cheers thai

Title: Re: Sounds like exhaust blow, but it isnt (seems common) AGG
Post by: Turbotezz on 18 October 2012, 12:27

I'm very sure its not a crack in the manifold, many tests have been done and its defo not that.

Put the standard airbox on and its made no difference.
Pulled the plug out of the solenoid for the charcoal filter, no difference.

Run it on VAG-Com for a bit and all values are as they should be and no out of the ordinary operating conditions.

Could this then be a collapsed CAT? Anyone in the midlands got a decat kicking around i could borrow or even sell me?

Title: Re: Sounds like exhaust blow, but it isnt (seems common) AGG
Post by: sharki786 on 18 October 2012, 12:31

i got mine decat done from rj performance total was £110 ss (sounded like sh1t at 1st and then started to sound better as the week went by) sounded tinny

Title: Re: Sounds like exhaust blow, but it isnt (seems common) AGG
Post by: Turbotezz on 18 October 2012, 12:52

was it resonated? Can get a pipe off ebay for £45 and fit it myself at work!

Title: Re: Sounds like exhaust blow, but it isnt (seems common) AGG
Post by: Ashy on 19 October 2012, 03:16

Same noise. It's doing my tits in. If you find a solution please post on here.

Title: Re: Sounds like exhaust blow, but it isnt (seems common) AGG
Post by: sharki786 on 19 October 2012, 10:43

no its realy loud :grin:
in the past i sprayed wd40 on the alternator belt & the noise went away lol, it could be the belts

Title: Re: Sounds like exhaust blow, but it isnt (seems common) AGG
Post by: Bigbrysgti on 20 October 2012, 08:04

My 96 8v GTi has the same problem, sounds like a throaty roar like ive got no air filter in, everything is standard on the car,

Title: Re: Sounds like exhaust blow, but it isnt (seems common) AGG
Post by: Screech16v on 20 October 2012, 16:57

Quote from: Bigbrysgti on 20 October 2012, 08:04

My 96 8v GTi has the same problem, sounds like a throaty roar like ive got no air filter in, everything is standard on the car,

Your air box may have been drilled wing side.

Title: Re: Sounds like exhaust blow, but it isnt (seems common) AGG
Post by: Bigbrysgti on 22 October 2012, 16:15

Ah cheerz ill have a look tomorra.