i need everyones opinion.
heres the deal like the title says i have a ef with a b18b swap (obd-0).

Ever since the swap (6k) ago the car kinda sputters especially in the morning.

I just got back from the gas station and it did it alot more.

I threw it in 2nd (wot) and it boggss.

My first guess was fuel pump not being able to feed the bigger motor?

Note: i have a code 1 (ho2s)\


sorry for the paragraph

 

The stock fuel pump flows more than enough to run ANY B-series engine... even boosted to a point... (even though a $100 255lph Walbro is cheap insurance for those thousands.) so unless your fuel pump is clogged or the likes - that's not the problem.

You are throwing a Code 1. Well let's see - that's is your O2 sensor (it's the same for ALL OBD-0 EFI systems) and could be causing some of your issues. Sounds more like you got a bad tank of gas, your filters are clogged, your plugs need changed/tune-up, or ect... Basically some of this could have caused your O2 to go bad. Stop being cheap and relying on the Internet to fix your problems... Do some checking of your own! Replace a few parts I am sure are bad, and go from there... buy a Repair manual if you don't have one. If you do have one - a lot of this basic questions you have are usually answered in it! -Read!-