Since I guess I have to keep that damn OMP; I will have to plug up the lines running from it. I saw that people have used bolts to plug up the holes but wouldn't that put a lot of stress on the internals of the pump? Seeing as how the pump would still be trying to push oil through, but now it will have no place to go. Does anyone have any suggestions as to how I should disable the OMP and still leave it opperational to keep the ECU happy?

 

Where is everyone at today?

 

you don't need to keep the OMP, just get the block off plates here: http://www.k2rd.com/Online_Catalog/BlockOffPlates.htm

and run premix. you should be all set then

 

Series 5, stock ECU, needs to see the OMP working or you will limp home.

 

Can't you hook up a resistor to fool the ECU?

I'm not sure of the value, but I remember reading a post about it...

 

my bad, sorry

 

I wish you could just hook up a resistor. But according to the results I got yesterday, the system is too complex to just wire in some resistors. I took a look at the wiring last night and it seems that there is three wires on one plug and six on the other. My guess is that the plug with three wire is for: power, ground, and signal. And the six wire plug is for the monitoring system. Seeing as how they are just wires that can only transmit electricity at different levels. It bothers me that there is not a way to send each wire the needed voltage to trick the ECU. Oh well!

Back on topic. How are the rest of you guys running premix? You must have disabled the injectors and lines. Are you just letting the oil squirt out onto the motor all day?

 

no you can't because the ecu looks at the voltage coming back and the voltage range is tied in with load.
ie, at idle the voltage range is 1-1.5 (i dont have exact #s) and at full throttle the range is up near 5v. if you put a resistor in so it works at full throttle, it will limp home at idle and vice versa.

mike

 

As far as I know, I am the only person on the forum who successfully disabled their OMP on a S5 car(except the turbo guys who went to a haltech). Just blocking off the lines does create a lot of stress ont he internals. Your OMP will lock up, and you will get a cide, and go into limp-home mode every 7 min without fail(ask me mow I know). To get it to work right, you need to take the OMP off, and take it apart. Pull all of the gears and such out, until its just the aluminum housing, and the piece that the motor pushes against. Then put the motor back on, and the sensor. Leave out all of the internal gears and such. This will keep it from trying to pump oil, and locking up. Then block off the lines with solid bolts, and put the OMP back on, and plug it back in.

 

That sounds scarry! I would be **** outa luck if I damage the damn thing and then it doesn't work. I'll have to think about it; but thanks for the info anyways.

 

just block it off, wrap it in a rag and stash it over by the cruise control motor. As long as its plugged in.

 

The stepper motor AND electrical system need to be functional to keep the ECU happy. So it HAS to stay right where it is... the alternative is letting the lines flow into a (secure) container, obviously not practical.

So, do what I do and run 1/2oz WT-C3 2-stroke oil per gallon of gasoline. In conjunction with the OMP, this works just fine.