1990 Audi 2309cc 20v Coupe Quattro - Page 4

wildoliver · 24-03-11, 05:17 PM

The other cable is for the light in the dash display.

It can only be the sender unit now, you've eliminated the gauge/wire must be the sender.

ksaudi · 24-03-11, 05:35 PM

Thanks for quick reply.

To date, no one has mentioned having a Sender for sale. Have I got to buy a new one or is it worth starting a fresh thread for one?

Oh, I may have explained it badly or am being thick, but I don't understand why the other cable on the Sender is for a dash light

As always, thanks for all the help.

Keith

wildoliver · 24-03-11, 05:41 PM

Autocheck oil pressure warning is the other wire.

BMWs in scrap yards give up the senders too

msh · 24-03-11, 06:56 PM

Quote:

Originally Posted by ksaudi

Thanks for quick reply.

To date, no one has mentioned having a Sender for sale. Have I got to buy a new one or is it worth starting a fresh thread for one?

Oh, I may have explained it badly or am being thick, but I don't understand why the other cable on the Sender is for a dash light

As always, thanks for all the help.

Keith

Because existing oil pressure senders are just switches, but manometer, for logical reasons, needs analog signal, so sender for it provides resistance that varies according to applied pressure, and to avoid need to drill a new hole in block or have one spare with plug in it, that sender provides both needed functions.
Pressure gauge, when not connected, goes up until max like yours does, and temp gauge doesn't moves. The same result for pressure gauge can be achieved if it's connected to incorrect pin on sender.

msh · 24-03-11, 06:58 PM

Quote:

Originally Posted by wildoliver

Autocheck oil pressure warning is the other wire.

BMWs in scrap yards give up the senders too

Are you sure these BMW senders provides correct signal? Which BMW has oil pressure gauge?

ksaudi · 24-03-11, 07:14 PM

Quote:

Originally Posted by msh

Because existing oil pressure senders are just switches, but manometer, for logical reasons, needs analog signal, so sender for it provides resistance that varies according to applied pressure, and to avoid need to drill a new hole in block or have one spare with plug in it, that sender provides both needed functions.
Pressure gauge, when not connected, goes up until max like yours does, and temp gauge doesn't moves. The same result for pressure gauge can be achieved if it's connected to incorrect pin on sender.

Thanks for comments.
Losing me a little regarding Temp Gauge as the wiring diagram seems to show it entirely separate from Pressure Gauge with its own sensor.
What do you suggest I try before purchasing Sender?
Many thanks

msh · 24-03-11, 07:42 PM

Actually it's a bit hard to understand your situation from your comments [and I didn't tried hard], so what are you doing - are you installing aux gauges in car which doesn't have them and never had before? What parts do you have?
Yes, temp sender is totally different [and small] and it's in different place as well - in 5 pot engines it's mounted in oil pump in front of engine. I forgot was it on right [driver's in UK] side or front, I think front. Wire originally goes around engine on it's right side. If your car doesn't have any mud guards below engine compartment, you should see it relatively easy - there will be either sender or plug in it's place.

ksaudi · 24-03-11, 07:50 PM

Quote:

Originally Posted by msh

Actually it's a bit hard to understand your situation from your comments [and I didn't tried hard], so what are you doing - are you installing aux gauges in car which doesn't have them and never had before? What parts do you have?
Yes, temp sender is totally different [and small] and it's in different place as well - in 5 pot engines it's mounted in oil pump in front of engine. I forgot was it on right [driver's in UK] side or front, I think front. Wire originally goes around engine on it's right side. If your car doesn't have any mud guards below engine compartment, you should see it relatively easy - there will be either sender or plug in it's place.

Original Pressure Gauge (not fitting extras) which flies to max when ignition on. Looking at large Sender near Rad (UK Passenger/Nearside). My other posts above say what we have tried.
Thanks.

msh · 24-03-11, 08:26 PM

You have only one bare gauge and nothing else? Where are you planning to put it?
As I said earlier, it's normal that that gauge goes max without proper sender connected.

ksaudi · 24-03-11, 08:35 PM

Quote:

Originally Posted by msh

You have only one bare gauge and nothing else? Where are you planning to put it?
As I said earlier, it's normal that that gauge goes max without proper sender connected.

It is an original Gauge, i.e. the car is fitted (original equipment) with Oil Temp, Oil Pressure and Volt Gauges.
As already stated we have tried a new temporary Sender to Gauge cable but without success.
General feeling seems to be that it is a faulty Sender.
We are happy to try anything else.
Thanks

24-03-11, 05:17 PM	#31
wildoliver Grown up member Join Date: Feb 2009 Posts: 436	The other cable is for the light in the dash display. It can only be the sender unit now, you've eliminated the gauge/wire must be the sender.

24-03-11, 05:35 PM	#32
ksaudi Grown up member Classic Audi Club Member Join Date: May 2010 Posts: 51	Thanks for quick reply. To date, no one has mentioned having a Sender for sale. Have I got to buy a new one or is it worth starting a fresh thread for one? Oh, I may have explained it badly or am being thick, but I don't understand why the other cable on the Sender is for a dash light As always, thanks for all the help. Keith

24-03-11, 05:41 PM	#33
wildoliver Grown up member Join Date: Feb 2009 Posts: 436	Autocheck oil pressure warning is the other wire. BMWs in scrap yards give up the senders too

24-03-11, 07:42 PM	#37
msh 4 ring whore! Join Date: Jun 2008 Location: Rucava, Latvija Posts: 3,816	Actually it's a bit hard to understand your situation from your comments [and I didn't tried hard], so what are you doing - are you installing aux gauges in car which doesn't have them and never had before? What parts do you have? Yes, temp sender is totally different [and small] and it's in different place as well - in 5 pot engines it's mounted in oil pump in front of engine. I forgot was it on right [driver's in UK] side or front, I think front. Wire originally goes around engine on it's right side. If your car doesn't have any mud guards below engine compartment, you should see it relatively easy - there will be either sender or plug in it's place.

24-03-11, 08:26 PM	#39
msh 4 ring whore! Join Date: Jun 2008 Location: Rucava, Latvija Posts: 3,816	You have only one bare gauge and nothing else? Where are you planning to put it? As I said earlier, it's normal that that gauge goes max without proper sender connected.