algws6

iTrader: (3)

has anyone else had to mix jets with the NX maf kit in order to richen it up some? i had to pop the 150 fuel jet in order not too lean out on my H/C setup. is this normal?

slow

iTrader: (7)

how is your fuel supply? and bottle pressure?

nx normally is very conservative with most of the thier jetting. but with a modified car, you may need to do some tuning your self.

Ryan

taqwache

i would not reqamend it. if it is running too lean or rich, and you are positive you have the correct jets in it, i would say you have other problems elsewhere.

algws6

iTrader: (3)

everything else is perfect. for some reason it went lean but is doing fine with the 150 fuel pill.

taqwache

hard to say. if you have a stock fuel pump, you might be maxxing it out with your setup. i think 500rwhp or so is all they can take and with a H/C motor and spray, it is very easy to get more then that. have you changed your fuel filter lately? maybe it is that simple.

Brains

iTrader: (7)

FWIW I always independantly verify my A/F with a wideband to pick the fuel jet, regardless of what the vendor recommends.. They provide a jet map to match a basically stock vehicle, and they can't really predict all the variables.

algws6

iTrader: (3)

i have a walbro 340 in it. it has a lean spike of 14:1 at 4500 rpm then levels out to 12.8:1 all the way to 6500 rpm. is that normal. i really doubt i am running out of fuel since i am at 4200 feet above sea level.

SDB

iTrader: (7)

where is your window switch set at..., put a guage on the rail and see if you get pressure drop at all on the bottle.

algws6

iTrader: (3)

all is well after a few street runs on the 100 jets via EFI live. i have a hunch that the shops wideband is fucd.