Subject: S5 Oil Metering Pump
From: rotaryeng
Date: 4/9/2012, 10:54 PM
To: AAAA Put this in the To box


 I recently found a VERY nice looking '90 n/a rx7 at a local salvage
 yard with 180k on it.  I thought it would be a great instrument to
 learn more about the rotary in practice, so I went ahead and got it.
 Long story short, I ended up giving $600 for the complete car, and the
 only thing wrong with it is the common OMP failure.  The OMP failure
 also burned up the ecu.  I've got a new used ecu that looks to be in
 good condition, but the used OMP i bought off ebay didn't pass the FSM
 checks.  I'm not going to put it on the car and risk burning up a good
 ecu.  I knew it was a risk when I got it... ah well.

 Anyone out there have a working S5 oil metering pump they'd be willing
 to part with?  I know most people take them off for aircraft use... so
 I'm hoping to find a good one :)

 you can contact me at phyxius1@gmail.com

 Thanks,

 Joshua

 What state are you in Joshua? You might be able to use a block off plate
 on the pump and mix 2 cycle oil with the fuel at one ounce per gallon.
 That actually lubes the apex seals better than the pump. I mix a half ounces per
 gallon in my RX8 and the pump is still there and working. It passes CA smog.

 Paul Lamar

I'm not too worried about passing smog here in MS. From what I've
read, I'd have to re-chip the ECU to keep it form going into limp mode
if I block off the OMP.  I'd really prefer not to do that as long as
there is a possibility that I may sell it in the future.

Josh

Are you sure that is done on the 90? I know it is done on the 2004 on up RX8
but it has a switch on the pump the computer checks.
I don't see that switch on the 90 schematic. Maybe I am missing something.
How many wires coming out of the bad pump?

If the engine starts and runs with oil in the fuel and
if it goes into a limp home mode you should sense a drop in power.

Paul Lamar
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