Coupé B2 engine KV problem with full load

Gred · 12-10-15, 06:58 PM

Hello Ive got some serious problem with my KV engine. When it reach abou 4500 RPM it immediatly loses all engine power, deccelerate and starts "bark" into intake.
Iam mad of this, because ive tried almost everything, checked hole in vaccum, change air filter, plugs....
There might be something Ive forgot. Do you guys have a hint ?

Ive got a bad feeling about this thing :

Iam not sure where to plug it. Is there anywhere some kind of full scheme of vacuum ?
Thanks a lot and sorry for my english. Iam not very skilled.

Isimmo · 12-10-15, 07:31 PM

My guess is the rotor arm... If its got the rpm rev limiter spring,... They can grow weak and set the rev limiter low...

Gred · 12-10-15, 07:47 PM

Quote:

Originally Posted by Isimmo

My guess is the rotor arm... If its got the rpm rev limiter spring,... They can grow weak and set the rev limiter low...

Oh well ok. How could I solve it ? Is there any chance to buy/try new one ?

quattrostyle · 12-10-15, 07:48 PM

In case you got the rotor with limiter, just fit a non limiter rotor.

Gred · 12-10-15, 07:51 PM

Can you please give some number on it ? Ill try to search it by the number. Thanks

Isimmo · 12-10-15, 07:58 PM

Quote:

Originally Posted by Gred

Can you please give some number on it ? Ill try to search it by the number. Thanks

Nope, sorry, no idea what the number is, but 'EKTA' will know...

http://www.vagcat.com/epc/

Val · 12-10-15, 09:37 PM

It's deceleration valve. It's connected to airbox.

Gred · 13-10-15, 05:24 PM

Quote:

Originally Posted by Val

It's deceleration valve. It's connected to airbox.

can you please tell me how exactly it works ? Thanks

mikes2 · 13-10-15, 08:44 PM

Seen the same symptoms with the wrong fuel pump relay

Gred · 13-10-15, 08:54 PM

Quote:

Originally Posted by mikes2

Seen the same symptoms with the wrong fuel pump relay

Ive got new relay half a year ago, so I dont think there could be a problem.

12-10-15, 07:31 PM	#2
Isimmo Super Moderator Classic Audi Club Member Join Date: Jul 2007 Location: Sissix-by-the-sea Posts: 15,218	My guess is the rotor arm... If its got the rpm rev limiter spring,... They can grow weak and set the rev limiter low... __________________ 1985 WR quattro, 1985 20vT RallyRep, 1993 MTM ABY S2 Avant. 2010 S3 Sportback.

13-10-15, 08:44 PM	#9
mikes2 4 ring whore! Classic Audi Club Member Join Date: Nov 2007 Location: Polmont Posts: 2,617	Seen the same symptoms with the wrong fuel pump relay __________________ 1991 90 quattro 20v sport 1991 90 quattro

12-10-15, 07:48 PM	#4
quattrostyle 4 ring whore! Classic Audi Club Member Join Date: Feb 2010 Posts: 2,188	In case you got the rotor with limiter, just fit a non limiter rotor.

12-10-15, 07:51 PM	#5
Gred Newbie! Join Date: Oct 2015 Location: Czech Republic Posts: 9	Can you please give some number on it ? Ill try to search it by the number. Thanks

12-10-15, 09:37 PM	#7
Val Grown up member Join Date: Dec 2012 Location: 5vtq gte Posts: 177	It's deceleration valve. It's connected to airbox.