as long as its plugged in and receiving a signal it wont throw a cel.

 

Ok fixed vacuum line from FPR to mani, ran two 3rd gear WOT runs and AFR still super lean up top. Any other ideas?

Just to verify I believe I disabled lean spool correctly, maybe someone with more knowledge could verify. Tables added

<table name="Lean Spool Start RPM" category="Fuel Lean Spool" address="1280" type="1D" level="1" scaling="RPMStatLimit"/>

<table name="Lean Spool Stop RPM" category="Fuel Lean Spool" address="1284" type="1D" level="1" scaling="RPMStatLimit"/>

Start and stop RPM values set to 1500 and 1500

9* at 6500 19PSI at 6500

Found a post where people were experiencing similar issues and resolved replacing fuel pump relay. Will give that try as well.

 

Def something in the system that tells the fuel pump to go full bore. That small line i mentioned is common especially with the age of our cars and crappy rubber vac lines oe. Check or test the relays, your on the right path.

 

Can anyone tell me which is the Fuel pump relay for EVO 8 MR? It just shows pictures on cover. I found the below diagram. Its a lie! Its says B 128. I only found 2 relays on opposite side. Just not sure what is what.