Confusing Oil Pressure Problem

Tonyrandl · 21 Mar 2024

it would have been ideal to just change the scavenge pumps but I had to the all the engine again for something else so whilst it was out, I changed the main pump.it was also very reasonable priced so it made sense to change too.

Tonyrandl · 9 Apr 2024

All 3 pumps are changed and didn't make a slightest bit of difference to the oil pressure.

managed to take to take it for a small drive and it didn't drive well. it felt very down on power and 'lumpy' to drive. idles just fine.Need to check the variable timing solenoids.
Oil pressure issues is once again leading to the the oil jets not closing at idle or losing oil pressure at the variable timing parts

rl00123 · 9 Apr 2024

Wow, what a sad news.

bananaz · 9 Apr 2024

Sorry to hear that didn't help.

Tonyrandl · 9 Jul 2024

Sorry for the lack of updates, I just left the car in the garage until this week as I had run out of enthusiasm to fix it!

Plugged the car into a diagnostics (TEXA) and found error code 0012 camshaft position bank 1 which explains why the car didn't feel right when I took it for a test drive.
Here are some details of the data it was reading. I think that the camshaft adjust numbers are the cam deviation which at those numbers indicates a timing issue. but when I changed the pumps/tensioner, it as set perfect.

Or its an issue with a component of the VVT system.
Any thoughts or advice?

infrasilver · 10 Jul 2024

When I rebuilt my engine and took it for a rolling road mapping session, it was picked up that one of my variocam actuators was not working. I removed it and found that the valve body had spun, not allowing oil pressure into the actuator, it could be a similar issue to that.
I repaired it as there is a keyway that stops it spinning, this hadn't been tight enough, I punched the keyway again to as it was from the factory, and it has been fine ever since.

Tonyrandl · 14 Jul 2024

infrasilver said:
When I rebuilt my engine and took it for a rolling road mapping session, it was picked up that one of my variocam actuators was not working. I removed it and found that the valve body had spun, not allowing oil pressure into the actuator, it could be a similar issue to that.
I repaired it as there is a keyway that stops it spinning, this hadn't been tight enough, I punched the keyway again to as it was from the factory, and it has been fine ever since.

Thank, I'll pull it tomorrow and have a look. I'll let you know what I find

Tonyrandl · 25 Jul 2024

I removed the actuator and found it had an issue with the key way and wasn't seated correctly. Repaired the keyway and the engine is running perfectly and the oil pressure is now stable at hot idle........

Needs a road test this weekend to verify it but everything is looking good.

Haalex · 25 Jul 2024

Awesome! Glad to hear this is solved

infrasilver · 25 Jul 2024

Great news, fingers crossed for the road test.

Tonyrandl · 26 Aug 2024

Took it for a test, engine seems great apart a few other issues and it blew a power steering line.......

The other issue looks to be an issue with the ABS/PSM - car seems low on power from a stand still then is quickly ok and the ABS/PSM light along with the traction control triangle light on the dashboard seems to playing up. Hoping its just a bad ABS sensor

gizlaroc · 8 Sep 2024

A faulty maf can cause this too. No idea why a faulty MAF throws the ABS/PSM light, but it does.

Also, if not that, the cables that the ABS/Speed sensors plug into at the front break internally and far more common than the ABS sensor failing.
Porsche now sell a repair kit for them, you just go in through the wing and crimp (or solder) the new one to the old cable. They fail near the wheel carrier, as they twist so much I guess.