Rich at WOT

[CrazyM]

So I'm having a problem only at WOT.

Mods are in my profile, I have an SAFC(0'd out right now) and Wideband 02 to tune with. Also have a Keydiver stage 3 chip compensating for everything..

I have done some searching but what I am finding is "Do a boost leak test"

At first I was thinking this may be possible, but!'


This problem only started AFTER I installed my fuel pump, before this as soon as boost got up to around 15 psi, my AFR started leaning out lots. Running LEAN at WOT before.

My GM maf is located in my upper intercooler piping and there is no boost leaks in my throttle body making me lose that much air..

Anyone got any ideas?

 

[jrohner]

You were running out of fuel pump before, now you're not. It cured a 'problem', it didn't create one. The stock maps are very rich, so if you aren't pulling fuel with the afc you will be rich. If you already have a wideband, what are you waiting for? Start pulling fuel (with a logger too, not just going by the wideband alone).

 

[CrazyM]

Yeah I realize that, but I figured with everything being compensated via Eprom chip, Including adjustment to fuel pressure. I should be running a little better. I know stock fuel maps are usually between 9.0 and 10.xx air\fuel.

I've also tried dropping fuel pressure back down to about 39 psi and still didn't have much of a change.

Should I just try going to the -% on my safc and seeing about gettting closer to a 11.1 ish F\R?

 

[Tranceworx]

Shoot for 10.5 A/F on pump via tuning on your AFC. It would also be good to have a logger handy so that you can watch for knock as well.

Your EPROM chip is only going to get you close thats where the AFC comes in. Your tool for fine tuning. Its near impossible for anyone to burn a perfect chip for all your variables. This is why most chips are excessivelt rich for safety sake

 

[CrazyM]

From the reading I've done most people say shoot for 11.1 A\F ratio...

I know it's not going to make it dead on, but I thought it might help it get a bit closer. Pretty new to the tuning aspect of it all, but definitely learning!

All thoughts\ideas and suggestions are welcome!