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450's too rich

Old 04-22-2004, 01:42 AM
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Default 450's too rich

been reading the forums forever, never bothered to post questions, getting desperate.
car-sohc turbo crx, tdo4 setup, intercooler, msd, walbro 255
you get the point
car runs fine on 240's but way too lean over 6psi, goal is 9
wired the bluescreen afc and installed blue top 450's
all afc settings correct, i've read the faq and forums 100x
car idles like a harley even with H/L settings all -50
black smoke and stinks like gas
find mitsu 390 injectors instead? any advice to get the 450's to work?
also, i see them on ebay all the time, before i try rc 310's or 370's, has anyone ever wired high impedance rc injectors for a crx? do i just get rid of the injector resistor box and everything will work? any advice highly appreciated. thanks
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Old 04-22-2004, 06:39 AM
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Default Re:450's too rich

Sounds like the AFC is hooked up wrong, or your injectors are bigger than you think, or they are ----. Triple check your wiring.
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Old 04-22-2004, 09:57 AM
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Default Re:450's too rich

list all your settings, fuel correct and the misc setup like pressure / 06 06 etc..

what model is your crx si ?
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Old 04-22-2004, 12:40 PM
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Default Re:450's too rich

ok, the afc is wired correctly according to the apexi american d16a6 chart that i downloaded from the site. i also looked up the j spec chart and was told that was for b16 applications only by a couple guys who have already wired the afc's into their crx's with b16's. yes, the brown ground is closer to the ecu and the black is further down the wire by 1cm like apexi stated.
the injectors are def 450's because they have blue tops and 450 is labeled directly on them. the afc is set 6in 6out, 4cyl arrow facing northeast, throttle % 71/72. the only factors i can think of that would change anything is the 88-89 integra ecu i am using and the 255 walbro possibly giving too much pressure. i even cut the spring in my adj. fpr to get the static pressure down to 40psi. should i try the injectors with the afc set at -50 across the entire rpm band on high and low throttle, or should i just look for dsm 390's? at this point i am even considering dishing out the money for rc 310's or 370's. my only concern is how to bypass my injector resistor box because the rc's are all high impedance. any advice on rewire from low to hi impedance? thanks for taking the time to read the post-scott
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Old 04-23-2004, 05:55 AM
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Default Re:450's too rich

I dont think by going with smaller injectors will you have any more luck, unless yours are bad and are leaking by. The 450's seem optimal and you can lean the crap out of them with the hack. Something else is wrong.
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Old 04-23-2004, 04:08 PM
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Default Re:450's too rich

ok, so if 450's have worked for everyone else, they should work for me. going by this philosophy, the only thing i can think of that may be wrong is that when i first installed the injectors, i set the afc settings to -50% across the board on high and lo throttle. according to the mathematical equation and explanation on the faq, i should only have to lean the injectors out to -40 at idle and slope the fuel curve upward from that point. could setting the "eq" or fuel curve flat and as lean as -50 be effecting anything? i know that the afc is working properly because i now have the stock 240's in with the afc set to 0% across the board and it runs perfectly, just can't boost cuz the obvious would occur, and if i lean out the settings on the afc, i can get the car to stall out because the afc cuts the fuel. i could have beat 450's and have already considered getting them flow tested but do not want to waste money on injectors that will always run too rich. for some background, my buddy's turbo integra would not even run with the 450's he tried to use, but i figured that was because he had the old school apexi afc with the 5 rev settings and + - 30% for the fuel.
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