possible S5 TII OMP problem

[hIGGI]

S5 TII, fresh rebuild

car runs like shit when u try to load it up a little bit, which seems to be OMP problem....i checked resistance on 6pin connector and there is none, assuming OMP is really bad....

question is : can i use some resistors and 'cheat' stock ECU to run ok without OMP or is my only solution to find some good OMP?

[Phoenix7]

I looked at the specs for both the NA and TII oil pumps and here are the differences:

NA pump diameter x width of rotor: 50mm x 17.5mm
TII pump diameter x width of rotor: 50mm x 12.5mm

You may have a hard time using an NA OMP pump if you look to replace it. Let me know if you want to trick the ECU or get aa new OMP.

[Boostmaniac]

This problem just doesn't sound right. Do you have any more info on the engine?

[hIGGI]

Originally Posted by phoenix7

I looked at the specs for both the NA and TII oil pumps and here are the differences:

NA pump diameter x width of rotor: 50mm x 17.5mm
TII pump diameter x width of rotor: 50mm x 12.5mm

You may have a hard time using an NA OMP pump if you look to replace it. Let me know if you want to trick the ECU or get aa new OMP.

I am talking about OMP, not oil pump.....

[hIGGI]

Originally Posted by Boostmaniac

This problem just doesn't sound right. Do you have any more info on the engine?

I have built engine and everything else in test came ok. I had same car (with no problems) sitting next to this one and i checked and compared everything, replaced fuel pump, afm, boost sensor, measured tps etc...)
Last thing i tried was unhooking OMP on working car and it started to behave exactly same like car with problem. Then i measured resistance/voltage on OMP of working car and on other car as well - working car had good results, problem car none. Thats the point where i found OMP (or its wiring) to be faulty and thats why it goes into limp mode. With some luck, i might get working S5 OMP from friend today and will hook it up friday to see if its all whats wrong...

Will let u know

[Phoenix7]

Originally Posted by hIGGI

I am talking about OMP, not oil pump.....

[hIGGI]

have spare OMP from friend, will try to hook it up today and let u know results.....

[RETed]

You cannot fool the stock ECU unless you get a microcontroller.
The problem is that there's a feedback circuit which tells the stock ECU what position the stepper motor is in.
This is the big problem.
It's easy to fool the stock ECU into "seeing" the 3 stepper motors (via resistors), but how do you fool the feedback circuit?


-Ted

[hIGGI]

Replaced OMP today, problem fixed....

[Max777]

well, you can either:

A: Buy the RTEK S5 omp canelling chip for $100, then get a S5 OMP block off plate, gasket, and RTV to seal it..

or,

B: Get another used S5 OMP, and refurbish the lines courtesy of a guide on the evil forum.