Hey Guys,

I noticed my car has been smoking a light blue on idle and it does clear, i ran the car up for a good 15 minutes and it wouldn't improve, i took the plugs out and they where covered in oil, cleaned them back up and chuck them in again and after 10 minutes of running they where back to the same state. I believe my oil control rings maybe gone, my compression is good floating around 115psi for a turbo S5 which has recently be rebuilt. But i also came across a thread where the factory OMP can get jammed open?! i just wanted to know if someone can confirm this and would unplugging the vacuum line to the oil injectors stop it so i can check if the smoking goes away, i will have to add premix to the fuel just encase. Any other ideas on how to go about which is the culprit for the smoke?

Thanks

 

The hoses to the oil injector aren't actually vacuum, they're just a source of filtered air (they're ran pre-throttle plates). The engine supplies the vacuum side. If it's a S5 you likely have an electric OMP and it'd throw a code if it was stuck in position. It's hard to really diagnose the oil control seals vs the turbo as sometimes the oil can run backwards from the turbine down into the engine and it'll kind of pump it around. I'd almost guarantee that the OMP isn't the issue.

 

Would it still throw a code if im running a Apexi Power FC? also the turbo is brand new its a Garret GT3582 and i have 2 x 1mm restrictors in the oil feed line.

 

Ahh the more info the better! You can check the Power FC commander to see if the OMP is out of range. Turbo is likely not the issue then. Go to ETC on the PFC then to Sensor/SW Check, there should be a full list of all the sensors/inputs. You should see the OMP on there somewhere. If I recall, it'll highlight the name of the sensor if it seems to be out of range. It's been a while so I'd have to check the PFC manual to remember exactly. But if it gives you a voltage readout you could try to compare to the FSM.

 

Here's a pic of the screen you mentioned of all the sensors, two seem to be highlighted however one is just described as ****. The key was turned to ACC when i took this the car wasn't actually running its late here so i cant start it till morning as it sits in the garage. Im guessing VMOP is the OMP?

Thanks

 

Yes, I believe that's one of them. I'll check the PFC manual real quick for the highlighted values. My FD had a bad OMP and it'd read around 3v or so all of the time.

 

VTA1 is TPS full range, VTA2 is the narrow range. I'm pretty sure the OMP uses the full range for operation, but I don't believe it'd cause smoke/oil on the plugs to that effect. Have you tried perhaps pulling the EGI fuses out, removing the plugs & cranking or a bit, let it sit for a couple minutes, crank some more (ideally blowing anything in the chambers out), then just letting it sit for maybe 10-15 minutes, cranking (still with the EGI fuses out), and rechecking your plugs? Usually if the control rings are bad you'll find that the oil will be back again just from the cranking pressures/sitting.

 

I'll give it ago cranking it a few times without the fuses in tomorrow, i also have a brand new TPS should i chuck that on for good measure?

 

I doubt that it's bad, it just may be out of the normal operating range for some reason or other. I would have suspected the voltages to be relatively similar (or near the ~1v range for both actually). The VTA1 should read all the way to near ~5v at WOT, the VTA2 should read 5v at maybe 30-35% throttle. I don't think it'll affect anything though as I think the PFC tries to automatically correct the sensor voltage based upon what it reads at power on. I'm not sure if it does this if the value is so far out of range though, I can't recall. You could probably just go adjust it out to ~1v or close to it for good measure.

 

Thanks ifryrice, i adjusted the TPS as best i could but the car still jolts when trying to hold a crusing speed but the long drive seem to clean everything out, it doesnt smoke anymore and isnt drinking oil either. I'll put the new TPS on and go for a tune as the top end could do with some work.

Thanks Again

 

Is it using the original S5 dual plunger style TPS? You can check them with a multimeter by putting it on ohms (generally K ohms), and make sure it goes smoothly through the range. If there's any blow opens or anything along the way that'll cause quite the headache for the PFC. Glad to hear it's not goin crazy on the oil! It could just be running pig rich and fouling the plugs up too.