Quote:
Originally Posted by ainarssems
I was suggesting the old oil trick to Ranj. It is not conclusive but does give idea if it's more likely to be piston cylinder or head/valve problem.
How much is the compression difference?
When you say no fault code are there no codes at all not even for misfire? Does it show misfires in measuring blocks?
You do not need expensive camera/borescope to look inside cylinder you can make one out of old laptop webcam which you can pick for less the £10 from e-bay if you do not have donor.
|
Need a new compression tester to give proper readings. The one I was using read 6 bar before I even connected it (!) I'll pick one up tonight.
The best cylinder I tested read around 15 bar, the faulty one read around 10 - but I cant guarantee these numbers, only that the faulty cyclinder read relitively quite a bit less than a working one.
Nothing in vagcom at all for misfire - As I believe it is firing, but oddly there arn't errors even when I unhook coil packs. Not checked measuring blocks, but will do.
Still puzzled over the wet plugs though. If it fires, why would the petrol still be there. Is it possible to have wet plugs with low compression only - Or should I be looking even harder into the wiring ?
Is the oil test theory that the oil will help seal the piston a little, thus improving the compression if the pressure is leaking around the piston?
I'm not scared to sort out a valve problem, as that can be done with the block in situ, but if I'm removing the block, might as well put something more interesting in -but I havnt got time for that ......
Oil and water are both clean and seperated btw, so not suspecting head gasket right now.
Arrgh... This is a steep learning curve for a non-mechanic like me..
__________________
For parts enquiries and
Forum User Administration please contact customer services directly, not me
-
enquiry@a8parts.co.uk, www.a8parts.co.uk, or call
01642 783537
The Daily Town Car - 2023 Tesla Model Y Performance. Black with Black. Giant ipad screen, huge sunroof, 4 wheel drive, Tow bar, lots of ooomph and made in China, so actually built properly unlike the Californian ones.
The Family Wagon - 2018 Tesla Model X. Black, 7 Seats, Towbar, Homelink, Enhanced Auto pilot with Summon and self park, Heated front seats, CCS Charger upgrade, MCU2 Upgrade, Falconwing Doors, Self opening / closing doors, Netflix, Spotify, toys, Air suspension, alcantara roof + lots of other stuff......
The 17 year old Driver Wagon 2015 Skoda Citigo Monte Carlo. Alloys, Power steering, Aircon, Leccy windows, Sat Nav, bluetooth, central locking, cup holders, 59 whole bhp. Million times better than my first car. Well jealous.....
The First 20 Audis:
2001 D2 4.2 QS Silver, 1997 D2 S8 Silver, 1999 D2 4.2 Silver, 2002 D2 S8 Dolphin Grey,
2003 C5 RS6 Blue, 1998 D2 S8 Black, 2000 D2 4.2 QS/S8 Ming Blue, 2003 D3 4.2 Ming Blue,
2005 B7 S4 Blue, 2006 D3 3.0 Tdi Black, 1999 D2 4.2 Silver, 2003 D3 4.2 LPG Crystal Blue,
2000 D2 S8 Silver, 2007 3.0 Tdi Q7 Black, 2009 B8 S4 Black, 1998 D2 S8 Agate Grey,
2006 D3 4.2 Tdi Blue, 2006 D3 S8, 2007 Q7 3.0 Tdi, 2006 C6 S6,
The Second 20 Audis:
2011 A7 Sline, 2001 A2 1.4 Tdi Black, 2002 A2 1.4 Tdi Silver, 2006 A8 4.2 Tdi Blue,
2007 4.2 Tdi Q7, 2006 S4 Cab Silver, 2010 RS6 Saloon Black
, 2007 TT Roadster,
2010 A8 D4 4.2 Silver, 2006 C6 A6 2.7 Tdi Quattro, 2000 D2 4.2 QS/S8 Ming Blue (again), 2008 Q7 4.2 Black,
2009 C6 RS6 Saloon Daytona Grey, 2001 Fully Loaded A2 Tdi, 2006 Avant S6 Black, 2007 VW Caravelle Exec Black (almost an Audi)
2009 TT Roadster Daytona, 2015 Q7 4.2 tdi lava grey, 2002 GmbH D2 demonstrator, 2006 D3 A8 LWB 4.2 Tdi Black
Most Recent Audis:
2001 A2 1.4 Tdi Black, 2007 4.2 FSi Q7 ABT Blue, 2016 S5 Coupe Launch model, 2004 S4 B6 Cabriolet, 2016 Q7 Sline White, 2006 Q7 4.2 FSi Black, 2012 Q7 Sline+ 4.2Tdi White, 2008 Blue Audi S8
Everything Else
1989 Subaru Justy, 1986 Vauxhall Cartlton 2.0 GL, 1985 Vauxhall Carlton 2.2 CDi, 1987 Ford Sierra XR4x4, 1983 Vauxhall Senator, 1985 Vauxhall Senator 3.0i, 1997 Polo Saloon, 1997 Peugeot 306 1.9 TDi, Ford Sierra Sapphire 2000E, 1990 Subaru Justy, 2000 Subaru Impreza, 2000 Subaru Impreza RB5, 1993 Range Rover LSE, 2005 VW Bora, 2003 Skoda Superb, 2003 VW Passat V6 4 Motion, 1996 Peugeot 106, 2000 Range Rover 4.0, 2019 Tesla Model 3 Performance