Removing OMP on a 90+

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Jun 12, 2003 | 03:02 PM

Bambam7

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I came, I saw, I boosted.

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From: Windsor, Ontario, Canada

Removing OMP on a 90+

OK, nobody seems to have been able to have any luck with removing the OMP on an S5. The problem is that the ECU throws a limp home code as soon as the pump is desconnected (for going premix)

Well, there has to be a way to do it... and I'm going to figure it out.

I'm going to start with the simplist attempts- using resistors of the same values specified by a "functional" pump in the FSM

If anyone has any info that may help out, post it here!

It's dumb to have to leave the motor connected if you are running premix on an S5.

Jun 12, 2003 | 03:46 PM

Aaron Cake

Engine, Not Motor

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From: London, Ontario, Canada

Re: Removing OMP on a 90+

Quote:

Originally posted by Bambam7

Well, there has to be a way to do it... and I'm going to figure it out.

Just responded to your PM. Also, I have this to add.

It would be easy to program a microcontroller to mimic the metering oil pump and fool the ECU. It's just that no one has done it yet...

Jun 12, 2003 | 03:53 PM

Bambam7

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From: Windsor, Ontario, Canada

This message as was an email reply to Racing Beat.

Quote:

Your message was forwarded to Jim Mederer, Racing Beat's co-founder and
chief engineer for review. His reply is as follows:

The ECU expects to see changes in the follow
potentiometer based on stepper motor commands, so a
simple constant response isn't going to avoid throwing
a code. If you are interested, we have several new
NF01-14-600A stepper motors with follow pots - $50. Call and ask for Jim
Tanner at 714-779-8677.

Jim Mederer

Well, that settles that! I'm not doing anything with a computer.... Not right now anyways. I'll just buy a new pump.

Jun 12, 2003 | 04:05 PM

Liquid Anarchy

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From: Springfield, MO

Why not just replace the banjo bolts on the OMP w/ regular bolts, and get rid of the lines?? Sure, there's still a wire there, but it's not in limp mode; think of it as a clunky blockoff plate that serves a perpose.

...but I guess that would only work if your current OMP is still good...

Jun 12, 2003 | 05:12 PM

j9fd3s

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From: https://www2.mazda.com/en/100th/

we went thru this a couple years ago, the ecu seems to have a mop voltage range for a given load vs rpm map. so what works at idle wont work at higher rpms. prolly not hard to simulate if you really wanted to, but whats the advantage to doing it? get rid of something that works?

mike

Jun 12, 2003 | 05:17 PM

deadRX7Conv

Opinions are like........

Joined: Dec 2001

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From: Prov RI

Remove oil injectors, disconnect MOP/OMP injector lines, run homemade lines to hole drilled into oil filler/cap....

Use the MOP to inject oil back into the oil sump.
This means that the OMP must be working. Sucks if you toasted the metering oil pump.

Has anyone tried the dangling MOP method which is to remove OMP, install block off plate, allow MOP to dangle(secured) somewhere in the engine compartment still hooked up to the wiring harness?