wierd new lean problem.... again :)

se7en · Post by **se7en** » February 18th, 2008, 10:07 pm

okay, this is wierd.

i run perfect A/F ratios when I first start up the car and go boosting, but after about 35-40 seconds, it really runs lean under boost.

what the heck ?? i think the computer when it warms up, it thinks that it should run lean for some reason. I don't know why though... you would think the computer would run richer if there was any problems....

anyone have any ideas?

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Flinch · Post by **Flinch** » February 19th, 2008, 6:04 pm

lol man when i can down there we whould have tried my extra K8 ecu. i though all cars ran richer when you first start them up cold untill they warm up totaly.

tehbrookzorz · Post by **tehbrookzorz** » February 22nd, 2008, 3:25 am

I think I'm gonna be bugging you guys for help when I get my KL installed. Know MSnS V3?

EZ_4_FUN · Post by **EZ_4_FUN** » February 22nd, 2008, 1:42 pm

Are you boosting on the stock ECU???

se7en · Post by **se7en** » February 22nd, 2008, 1:51 pm

ya lol, I am getting a MSnS soon(week), but for now, I use an FMU(vortech), which some people seem to be having good luck with.

EZ_4_FUN · Post by **EZ_4_FUN** » February 25th, 2008, 2:52 am

Thats why your leaning out. Your stock ECU has no idea your running boost. The FMU is not enough to add the required fuel for 7 psi; not even close. There are some calculations you could do to determine how much fuel you need. You'd probably find that its more than the injectors your running can physically handle.

Dont tell me your running stock fuel injctors as well???

Did you get a copy of Corky Bell book?

solo_ryder · Post by **solo_ryder** » February 25th, 2008, 10:14 am

He's running 220cc DE injectors on his K8 with a AFPR as well FYI

se7en · Post by **se7en** » February 25th, 2008, 11:54 am

EZ_4_FUN wrote:Thats why your leaning out. Your stock ECU has no idea your running boost. The FMU is not enough to add the required fuel for 7 psi; not even close. There are some calculations you could do to determine how much fuel you need. You'd probably find that its more than the injectors your running can physically handle.

Dont tell me your running stock fuel injctors as well???

Did you get a copy of Corky Bell book?

some people here had plenty of success(andy,antwan, and others) with the fmu setup. and yes. I upgraded my injectors, and I have read corky bell's book

5 more days till I get my MSnS.

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wierd new lean problem.... again :)

wierd new lean problem.... again :)

Re: wierd new lean problem.... again :)

Re: wierd new lean problem.... again :)

Re: wierd new lean problem.... again :)

Re: wierd new lean problem.... again :)

Re: wierd new lean problem.... again :)

Re: wierd new lean problem.... again :)

Re: wierd new lean problem.... again :)