I finally had some time away from work and was able to do my install.... came back from the tuner a little worried.

Im aware venting bov to atmosphere causes a motor to run rich briefly due to MAF already accommodates for it. When i give a little gas, say 0 vac, and let off or push in clutch (as if stopping) afr's drop to 10.0:1, then rpm's drop below idle and motor gives a little shake. From here it either stalls out or jumps super lean before leveling back out stoich. The latter being the scenario most of the time. But should it be that fat with fuel???

Also when cruising on highway (staying in vac), afr's seem really bouncy. Tend to bounce back and forth from 13's to 15.5 sometimes up to 16's. Never really tries to balance out.... although when i put on cruise control it steadys out to 14.7:1 So im beginning to think i have a twitchy a$$ foot or something....i just dont remember my integra having bouncy afr's like that, i havent been boosted in about 4 years LOL

What do you guys think.... Am i being paranoid? or sound like a some tuning errors? Anybody have the same issues?




Oh yea heres my setup:
TT Simple kit only runing 5lbs (for now
Garrett t3 57 trim
tial 38
hks bov (atmsph)
550cc injectors
FIC
uhmm.....guess thats all thats needed

 

the first question, i can't answer as i don't know. But for the second question, when feathering the throttle (cruising) you're not pushing as much fuel in the mixture and it will bounce high like that...just make sure that during WOT it does go a lot lower...but not too low

 

thanks for the quick reply. That makes me feel a little better LOL It holds steady 12-12.5:1 at WOT. maybe slightly lower...


i remember my tuner saying it was asking for more timing in some areas......seemed kinda odd as well but im by no means a tuner

 

your stalling and sputtering due to the atmosphere venting bov its normal on our cars really only fix to it is to recirculate it, u can get a REALLY GOOD tune and it wont do it as much..itll do it once in a blue moon but the permenant fix is recirculation the bov, and yes at partial throttle you will be boucning because our cars for one are drive by wire its sensitive and two we cant tune our partial throttle but on that size turbo your partial throttle wont be boosting so youll be fine

 

^ on any size turbo at cruise throttle u wont be in boost LOL

 

^^and to add, I don't think you get stalling issues if you were to have a blow-thru setup with the MAF.

 

I dont have stalling issues with my Atmospheric BOV,

What kind of plugs are you using and whats the gap?

Throwing Fireballs when the BOV vents sometimes? It does create a extremely rich enviroment for a split second...

 

I don't stall either just for the record.

 

correct it works but i dont its not something i go reccomending people, just because we havnt ran setups like that long enough or logged what the ecu reads when u run blowthru




and for those that didnt stall theres always the lucky few, i never stalled either

 

^^Where you been? Blow-thru setup has been ran for some time now.

 

i thought only ones running it for a while now was ptunning, i thought others were recently trying to move to it

 

sound performance has been running blow thru for 3 years now...they have been out since zpi...just noone really buys their kit...but the people who d,o have been running their kit for years now with no issues with the blow thru set up

 

There have been others to try it. PTuning made it built into their kit though, and actually raced it.

 

i dont see the reason other kits chose pull type mafs...it doesnt utilize the maf sensors full job on our cars...and it makes way more sense to have a blow thru

 

Oh yeah, I forgot about the SP kit, good call.

 

the stalling after off throttle is a atmospheric bov issue as mentioned... the bouncing afrs on cruise on my opinion has to do something with your stock ecu closed loop operation.. if your fuel map is bit way off either too rich or too lean for the close loop to allow, it makes the afrs unsteady since closed loop keeps on pulling/adding fuel trying to make it where it wants it.. usually it causes a cel.. try monitoring your fuel trims and adjust fuel close to it..

 

it's supposed to bounce, if the o2 sensor sees a steady voltage it rules the o2 sensor as bad, the bouncing is called crosscounting, which it's supposed to see at LEAST 10 times per second.

your car sounds fine. do you have a cel?

 

also, the actual bouncing is needed because of the primary cat, the rhodium won't combine elements if it doesnt see a alternating lean, rich mixure

 

Car sounds normal to me. I have no CEL, but you are going to get the bounce as well fluctuation depending on your throttle input.

 

Thanks for all the replys fellas!



Had a cel when i picked it up but went away before i could get home to check it..


I think im just being paranoid LOL. im about to go get something to eat ill check out fuel trims