J Reg S2 in need of some help

**SteveH** · 30 November 2006, 19:58

David,

welcome to the forum

The problems you are experiencing are likely to be due to a number of air leaks from the system. Leaks, however small, cause running problems on the S2; some of the leaks you have with disconnected hoses will definately be part of the running troubles you are presently experiencing. A boost leak test would be a good idea, not sure if there is anyone who lives near you with a set of boost leak adapters? If there is that would help.

To answer some of your questions:

On the accuator there is a allen key screw this has been marked but the lines don't line up. Does anyone know how many turns from fully screwed down it should be screwed up??
From memory this should be 14mm from the top of the wastegate cap to the centre of the recess. I'm sure someone on the forum will be able to confirm the OE settings.

The accuator has a pipe that comes out of the top does this connect any where or is it just atmospheric.
Yup, it's open to atmosphere and should be that way.

At the back of the engine on the rear of the inlet manifold there is a black rubber pipe with a single red stripe ( i think that this is my running problem) it sucks while running but no sign of where it connects too. At the bottom of the fuel return there is a circular valve with a black rubber hose, this also goes nowhere? Do they connect??

There should be no pipes with air leaks, the system is closed. Check the routing of the vac pipes and replace as required.

The last few weeks the car idles at 2 bar on the oil pressure and runs at 3 boosting to 4 under acceleration but i'm sure that it use to go off the scale.

Check your oil levels.

Highland Audi in Inverness have been about as useful as a fish with **** can anyone on this forum HELP.

LOL

Hope this points you in the right direction.

Steve

**Davidsinclair05** · 30 November 2006, 21:34

From memory this should be 14mm from the top of the wastegate cap to the centre of the recess

How can i measure this???

**sal_s2** · 30 November 2006, 21:49

I wouldnt worry about the allen head on the wastegate yet, concentrate on sorting the vacuum pipes at the back of the inlet manifold.
They should all be connected

**Davidsinclair05** · 30 November 2006, 22:17

where does that pipe connect too? It is about 10cm long with a 3 or 4mm blue pipe that has crumbled away. I found a heat sheilded pipe 30cm loose at both ends, one end matches the blue pipe but the other end is a yellow pipe about 40cm long crumbled at the end!!
Would this connect to the bottom of the fuel return on the bottom of the inlet manifold??

**newsh** · 30 November 2006, 23:01

Click here, this is on S2 Central there's a link from the front page of the forum, and welcome, you will get your car sorted, with a little time

http://s2central.net/images/Vacuum_and_PCV/3B_Vacuum_Tree.jpg

**newsh** · 30 November 2006, 23:05

Again from S2 Central, ABY PCV system, this is similar to the 3B setup and will give you an idea of what is going on with the PCV system.

http://s2central.net/images/Vacuum_and_PCV/ABY_PCV_System.jpg

**S2central.net** · 1 December 2006, 16:10

Deffo looks like the vacuum/boost control hoses have crumbled away or been bodged with...

The long heat-shielded pipe running along the 3B pressure pipe is a ripe candidate for aging damage - it connects to the throttle bypass valve (which is hooked into the turbo output and MAF hoses). Other end of this control pipe goes to the back of the manifold - possibly tee's into a control pipe for the fuel pressure regulator.

Good luck

**4WheelDrifter** · 1 December 2006, 18:19

The DV could also be at fault, if it hasn't been changed for 4 years. It's hard to spot by doing the usual pressure testing. For ~Â£17 a 06A 145 710 N is worth a go, if all else fails.
I had trouble last year with a crumbled IM - FPR hose, it was a PITA.

J Reg S2 in need of some help

J Reg S2 in need of some help

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment