S2 stopped on highway - low oil pressure -help needed

[EvenM]

thanks, this is a strange one, but hopefully I will figure out whats causing this

So Always something after winter storage




oh yes indeed...or just a few weeks of inactivity- had a bit of drama getting mine to fire up again this week...thankfully it did eventually.
Good luck with finding your issue

Oh, good to hear it fired up eventually, what was wrong ?

[20Vcqdriver]

Not me personally, but I know of someone who lost oil presure, not enough to cause knocking but low enough to barely register on the gauge and the oil pressure relief valve had stuck or spring snapped (it was over 10 years ago now). He thought the worse regards oil pump but these don't tend to fail instantly. Suspect this especially if it was the gauge that dropped as engine cutout is normally activated from the pressure switch not the sender for the gauge, but will check this as its been a while and lots of water passed under the bridge..

[EvenM]

Not me personally, but I know of someone who lost oil presure, not enough to cause knocking but low enough to barely register on the gauge and the oil pressure relief valve had stuck or spring snapped (it was over 10 years ago now). He thought the worse regards oil pump but these don't tend to fail instantly. Suspect this especially if it was the gauge that dropped as engine cutout is normally activated from the pressure switch not the sender for the gauge, but will check this as its been a while and lots of water passed under the bridge..

Thanks for the information Please update me if you find out more

[Monkeymagic]

Could it not simply be that you have a ignition/sensor fault that has caused the engine to cut out, rather than an oil pressure issue. Once it has then the oil warning light will blink.

[EvenM]

Now the car is shopping when get hot , aprox 15 min after startup. Can g40 cam sensor be the culprit ?

[Monkeymagic]

Have you pulled the fault code

[EvenM]

Have you pulled the fault code

Yes, but the fault come and go, so when I Pulled the codes, nothing showed, other than g62? Coolent sensor something, that I dont think have something to do with this

Can try again tomorrow

[Monkeymagic]

G62 or coolant temp sensor is responsible for telling the ecu what the coolant temp is. On most VAG vehicles they can cause running issues. They are a white 2 pin sender on rear side of head toward the fire wall. I'm sure many people on here have had issues with G40 giving duff signals through heat soak. Mines a 3b so it's built into dizzy so little experience of these.
If you have vcds you should be able to watch the g62 on live readings. See if it giving odd readings etc

[EvenM]

The car does not start, and does not show any other faults than g62 in vagcom

No sparks on the plugs

[Monkeymagic]

Check for fuel spark and compression. Then see if the crank/ cam sensors are giving a reading on cranking. Is the crank position pin still in situ etc.?

[Monkeymagic]

Just read the no spark. Check if crank sensor is receiving s signal. I'm not great with vcds on the motronic as I know the data it gives is basic. I would still think it will give the basics in love readings

[fish]

You sure your crank pulley isnt broken?

[EvenM]

Just read the no spark. Check if crank sensor is receiving s signal. I'm not great with vcds on the motronic as I know the data it gives is basic. I would still think it will give the basics in love readings

How can I check that?


After fiddling with vagcom and vwtool for one hour without finding anything wrong we moved the car while turning the engine to use the starter motor for help
and then it suddenly started. Its living its own life

[EvenM]

You sure your crank pulley isnt broken?

Can it start sometimes with that broken?

[Monkeymagic]

If the crank pulley key is snapped/snapping it could throw the timing out. If it is that you need to sort it before and impact between pistons and valves occurs. Vcds should read the basics such as cam and crank sensors via measuring blocks