Hello I have a b16b swap in my 97 civic ex sedan with full bolt ons, along with supertech valvetrain, ID 725cc injectors, aem fuel rail and regulator, zex dry 75 shot and Walbro 255.

The problem is at WOT Around 4800-5000 it goes rich for a quick sec from 14.7 to 10.3 at WOT and starts to lean out after. My tuner was messin with the throttle tip in fuel initial normal tables but before that it was doing this at 3000-4400 rpm after messing with. Tip in fuel initial normal table on the s300 seem to fix it, but now at 4800-5000 rpm it does it again.

Any help???

 

Your tune is pure ****. Find a different "tuner" or start over from scratch. You will blow your engine if what you said is true; 14.7 A/F at WOT is absolutely unacceptable at that high of an RPM. Tip In Initial is only for right after engine start up.

 

I love the honesty :-)

 

Sorry came out wrong, part throttle at 14.7 then when I WOT it jumps to 10.3 then works it's way back up to 13.2-13.3. This is the all motor map before nitrous is activated.

 

It sounds like the issue is directly related to the tune.
Either consult with a local tuner or look into having an e-tune done which is a remote tune.

 

My tuner fixed the problem after reading all these comments...the problem was throttle tip in fuel trim, had to put bigger negative numbers on the throttle tip fuel trim, and now it goes once floor it and doesn't go too rich like before.

 

This should give you more insight.

https://honda-tech.com/engine-manage...ables-3252609/

 

Thanks for the help, all is fixed now.