PVerdieck

For the last 4-5 oil changes I have not had to add any oil in between the changes.

I use premix, I am using 8 oz of RP TCW-III synthetic.

I have no check engine light coming on (I have a PowerFC).

Note, this a 94R2 with 24K miles.

Could something have been disconnected that would cause the OMP not to function?

I know it used to regularly want more oil added, but not recently. I cannot honestly remember the last time it wanted more oil between changes. Everytime I check the dipstick, the level looks good.

I am using RP 10W-30. I change the oil every 1000-1500 and the oil and filter every 2000-3000.

Mods listed in sig.

paw140

Well, mine does the same thing if that makes you feel any better. I've always found it strange too. My oil level is *always* on full, but then the oil smells like fuel pretty bad too. I think the oil that gets used up by the OMP is replaced by fuel.

clayne

Actually this is an interesting discussion because it makes me think of a possible link between the OMP/lines/valves as a possible source of fuel dillution in the oil.

I wonder about the possibility of the oil injection valves allowing fuel mixture to travel back down through the OMP and into the pan.

Turbojeff, anyone else?

rdavidsrx7

Same boat as you guys, but on top of the fuel i have a little foamy coolant film in mine to. I'm so lucky! But I dont think it could be a disconected wire as when that happened to mine i was stuck in limp mode.

clayne

rd: the foam is typically condensation/fuel mixture froth - not usually coolant.

Settles at the top of the filler neck and then seeps back into the sump occasionally.

A catch tank helps with that filth.

rdavidsrx7

What if its actualy green? It used to be white a while ago now it is green plus i think my turbos have already left the building if ya know what i mean.....

DaveW

I wouldn't be surprised that your decrease in oil consumption corresponds to putting on the PFC and running richer mixtures, thus having more fuel dilute the oil.

rynberg

Pverdieck, check the OMP sensor in the PFC Commander sensor screen and verify the correct voltages.

If you are really concerned, plug the stock ecu back in and see if the OMP throws a code. If the OMP is bad, the stock ecu will put the car in limp mode.

mad_7tist

i have heard from a shop in fl that they have seen motors go because the pfc was not doing a good job of operating the omp. they do not sell the pfc or like it so take it fwiw.

obviousboy

i got an omp for sale if anyone needs it

PVerdieck

Err, how do I know what the correct voltage is Rynberg? To be totally honest, I figure I am ok with 8oz premix, but I could be wrong.

rynberg

Look up the correct voltage ranges in the Service Manual. It's in the F-section -- there is a several page table that lists all the operating voltages for various systems.

paw140

I don't think this is a possibility. The oil injection valves are located in the intake part of the cycle, so the highest pressure possible would be whatever the turbos are putting out. There's no way that small amount of pressure could cause backflow all the way through the omp and into the pan. And FWIW, I have new lines and valves on my engine (replaced them when I put in the reman).

rdavidsrx7

Plus i have never seen my oil pressure at a lower number than my boost.....max boost at around 3500 but i will see 50 psi of oil pressure, unless the oil metering pump does not work off the same amount of pressure that the sensor is reading. Correct me there if I'm wrong as I am not all that familiar with the oil passages in the housings.

cavellm

The last 2 oil changes I too have noticed a strong fuel smell in the filler cap. There has also been some cruddy greenish/whitish gunk around the inside of the filler cap. Nothing along the walls though.

I do have a couple small oil leaks, but mine uses about a qt every 1000 miles or so like normal.