After 9 years in storage, the pintles (pistons) may be stuck in the VANOS solenoid valves. The clearances are pretty tight and any varnish build-up would lock them up. Same goes for the solenoid valve on the accumulator, although I think the DME only monitors for electrical problems with the solenoid coil on that, and would not detect sticking.
Might be worth pulling the boards and doing the VANOS cleaning and listening for them clicking. But first you need to check you are actually getting a signal to them from the DME. Pins 1, 3, 4, and 6 on the connectors near the VANOS units energize the coils. Check for volgtage at any of these pins. Use the AC volts and DC volts selector on the multimeter.
I'm still curious about how the tuner is controlling the VANOS. Is he using a M5 DME? From what I have read it is very difficult to program an aftermarket ECU to control the S62 VANOS.
Of course, if you can only run the engine for 25 secs, this troubleshooting is tough to do.
You have a code for every solenoid like it is being starved for oil or they are all plugged, don't think that is possible. Logical thing is they are not getting a good oil supply.
68FB Where does the oil pick up for both of the high pressure pumps?
Still have not found anything credible to know exactly what 172 is, sorry. Read lots of speculation but nothing solid.
Thanks , also not likely that both would fail at the same time. Could be the other way and too much pressure, if the return was plugged. I would think that oil might show up in the intakes if that were true, but The returns are separate also are they not? That leaves the code 172 for the accumulator. It appears to be an electric valve issue. If the valve was stuck and effectively eliminating the accumulator what would happen? I think it might make the pressures spike in both direction, this might be enough to cause the cams to be in there wrong location?
anyhow, thanks to the serious people on this forum for help
have checked the wires from ecu to the camshaft sensors, and everything is ok there.
checked the wires from ecu to the contact for the solenoid boards, everything ok there aswell.
and took out the solenoid boards to check if they clicked, and they do. but how much should they open? if i look in the little hole in front of the solenoid it is just barely retracting in to the solenoid.
i have filled new oil in the engine before starting it, but it seems like old oil that came out when i removed the boards. shouldnt it be a hint of new oil if they are working correctly?
i have this vanos pressure accumulator. how does this work exactly? is it possible this is stuck somehow?
here is picture of the boards if you can see something wrong maybe.
Is there an electric plug in on your accumulator? That appears to be a pre vanos upgrade accumulator and should not have the 172 code. This makes me think your tuner may have not understood the engine you have.
The dirty oil in the nodes suggests that new oil is not being supplied to them. Your codes suggest the same thing. I have no clue what could do that. Have you checked to see if you have oil pressure in the engine?
If the number was
11367832189
then it might get a 172 code. I believe your engine is a pre 12/2000 engine, I suspect the DME you were supplied with is for a 1/2001 engine.
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