I bought a b20 and I'm ready to instal it to my ls integra. I'm using the same Ecu from the b18b it had. Someone told me I need to reuse the oil pump, do I really need to change the oil pump or can I leave the one that's already into the b20b

 

You have to swap it out, or look up a tutorial on FFsquad on how to bypass the CEL. It's very simple. Reason being that the USDM oil pump has a sensor that mounts to it.

 

By any chance can you send me a link to were I can bypass is? Would really appreciate it

 

I believe this is what you are looking for

.:FFS TechNet:. » ECU & WIRING How-To Articles » CKF Bypass Trick

 

Your going to run lean unless you get a adjustable FPR. I'd recommend leaving the b20 oil pump the way it is and just get a P75 ecu off ebay with your b20 basemap. They can disable the crank sensor and rear O2, set launch control and idle speed.

-Tom