smackhead999

iTrader: (5)

ive got my 6port turbo running and all, but she has a big miss in it. no aux sleeves, so its like a big extended port. that being the case i had some bdc extended port ideas about what i was dealing with. ive tuned my afrs at idle to about 13.0, but still get this missfire. i did some reading in this section, and saw a nice thread about people with big ports running much more advance in vacuum than i am. im gonna post a grab of an advance map i just altered based on my reading( mind you, this is advance from -5*, so 10 is really 5, i think). i think this might be a reason im missing so hard. any suggestions, or comments? i also just readjusted my split too. from 5 across the board in vacuum to 12 across the rpms at 15psi.

oh yeah, its high compression s4 rotors too.

smackhead999

iTrader: (5)

um im using 93 octane too

smackhead999

iTrader: (5)

i guess i must have asked a stupid question. figured id atleast get flamed or something.

well today i adjusted the map back down a little in the low rpms/idle vacuum area back to about bdc's extended map. started it and just like yesterday a miss. but today i replaced the plugs first. but it was still missing so i kicked up the advance as much as 5*more and even 5* less. with no change. id say at best the advance was 27* advanced.

figured id update incase anyone was interested.

pp13bnos

iTrader: (1)

Try leaning it out at idle. While it should idle at 13.0 pretty well, try going even leaner. On an old FC of mine, I ran it at 14.7 at idle. CJ

smackhead999

iTrader: (5)

when i was messing with the fuel before trying to lean it out to 13.0, i made too big a step a couple times and saw like 14.0-15.0 range. it ran and didnt knock or anything. but the way it ran def changed. was afraid to rev it to see response.

pp13bnos

iTrader: (1)

I don't know what kind of EMS you're running, but you should be able to tune just the idle. Is the miss through out the different RPMs? CJ

smackhead999

iTrader: (5)

ive only reved up to about 4000 cuz it starts to get leaner. but this is only in 40-60kpa range. medium vacuum id say. and i was too worried to think about whether it was missing by that point. but i know it is def less noticable as i rev up. given the afr leans out as i do rev. so it seems justified. and im megasquirt'n with a 16x16 map. so yeah i really have only tuned in the less than 2000 rpm area and high vacuum. like i said, i just been worried about going leaner. mostly been at 11.5:1 and have gone to 13.0 for a while.

pp13bnos

iTrader: (1)

Under light load you shouldn't be worried about detonation. With a n/a FC, it made peak power at a 14.2-1 a/f ratio.....so as long as you're not into boost, I would'nt worry about it going to lean. But it sounds like you need to have someone tune it for you, imop. Good luck, CJ

smackhead999

iTrader: (5)

well this is my first standalone... so its a learning experience. but yeah. having someone to help would be nice but, there isnt really anyone around here to do that. i live in delaware and i dont think there is a registered 7 owner within a hundred miles of where i live. in any direction. so im limited. there is a dyno about 15 minutes down the road. but if i pop my load, ill just rebuild it. its a 50000 mile engine anyway.. so no big loss. but thanks for the help. i had figured it was a mix issue last night right before you responded. and that just confirmed it. but seriously, thanks for the info.