Originally posted by UrS4boy
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Titanium Grey S4 Avant
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'93 Audi 100 Avant - R.I.P
'92 Audi UrS4 Avant - SOLD
'93 Audi UrS4 Avant LPG
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Originally posted by UrS4boy View PostThat is because the OE auxilliary gauges were made by VDO and based on 52 mm VDO gauges, hence the holes are for 52 mm gauges.
Good luck.
Boost gauge fits very well in oil temperature gauge, AFR gauge will be tricky but I'll manage.
btw, you wouldn't know which wire does what for clock? I assume there is +12v ground and siganl to set it?'93 Audi 100 Avant - R.I.P
'92 Audi UrS4 Avant - SOLD
'93 Audi UrS4 Avant LPG
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Originally posted by hunker7 View Postbtw, you wouldn't know which wire does what for clock? I assume there is +12v ground and signal to set it?
The starting point: http://forums.quattroworld.com/s4s6/msgs/304202.phtml
The failure point: http://forums.quattroworld.com/s4s6/msgs/307449.phtml
Problem is I don't believe this diagram (which I coloured):
RS2'd 93 UrS4 5 spd sedan
94 UrS4 V8 6 spd manual avant
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Injecotrs doesn't seem to be leaking, but I put spare set I had in to see if that helps. Today it was blue smoke only, so I assume it's oil, but valve seals are new Any ideas?'93 Audi 100 Avant - R.I.P
'92 Audi UrS4 Avant - SOLD
'93 Audi UrS4 Avant LPG
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Originally posted by hunker7 View PostInjecotrs doesn't seem to be leaking, but I put spare set I had in to see if that helps. Today it was blue smoke only, so I assume it's oil, but valve seals are new Any ideas?
RS2'd 93 UrS4 5 spd sedan
94 UrS4 V8 6 spd manual avant
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Valve stem seals only really stop oil running down the stems when the engine is shut down.
If you have blue smoke on idle only I would suspect worn exhaust valve guides or blocked PCV system.Panthero Coupé quattro 20vt
Indigo ABY coupé
Imola B6 S4 Avant
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I had the head off at the start of the year and valve guides were not very worn. What could cause PCV blockage?
Blocked exhaust would also explain sluggishness at higher loads.'93 Audi 100 Avant - R.I.P
'92 Audi UrS4 Avant - SOLD
'93 Audi UrS4 Avant LPG
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AAN/ABY/ADU Positive Crankcase Ventilation (PCV) System with revised diagram, PNs and
Originally posted by hunker7 View PostWhat could cause PCV blockage?
Mike74 on the S2Forum was having missing/hesitation issues with his RS2. He did a boost leak test and found issues with a failed one-way PCV ball valve and the pressure regulating valve. He replaced both and now things are good. He dissected the pressure regulating valve and found that it was very coked/oiled up inside. This probably suggests that periodic (every 2 years??) removal of the pressure regulating valve and cleaning it inside with solvent would be a good idea.
Item 3 below:
REFERENCE:
AAN/ABY/ADU Positive Crankcase Ventilation (PCV) System with revised diagram, PNs and Links:
http://forums.quattroworld.com/s4s6/msgs/22506.phtml
RS2'd 93 UrS4 5 spd sedan
94 UrS4 V8 6 spd manual avant
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Originally posted by hunker7 View PostLast summer I had all the pipework off and it was all washed and cleaned and washed again.
Assuming nothing bad has happened since you cleaned and maintained the PCV system, you might want to determine whether one or more of your catalytic converters is plugged, causing a back pressure.
RS2'd 93 UrS4 5 spd sedan
94 UrS4 V8 6 spd manual avant
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Your silencer has fallen to bits inside
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