abusedvtec

never did it until i installed the turbo and tuned it. im running the s300. w greddy b16 on 240cc tune w minor fuel adj in boost cruise and idle on 5psi with a t3/t4 kit untill i upgrade injectors in a few months car drives well 25 mpg except the turbo smokes a lil bit but i dont think that would cause it. Its like i start my car let it warm up for like 5 mins it wont happen but if i stop at a store and shut my car off go in and out in a hurry and it does it or just start it up and leave anytime in a hurry warm or cold it just doesnt seem to be getting any fuel or something but it happens so quick my plx wideband is still calibrating or whatever it does it sits @14.6 for like 5 seconds so i cant really get a number on it i can datalog it but dont know what to do with the datalog after so someone can look at it please any help or advice would be appreiciated thanks

kyden

are you using the narrowband input for closed loop? it takes about 30 seconds for it to heat up.

abusedvtec

no i am using wideband input but i am running closed loop

abusedvtec

finaly someone doesnt scold me for runnin 240CC INJECTORS lol

TheShodan

iTrader: (14)

Just wait.. it'll happen soon. ;-)

VtEcB0i

your motor wont last very long on 240cc lol you need at least 440cc for a turbo setup or your asking for engine damage.

racebum

well...let's do the math. if you use a break specific fuel consumption of .6 which is pretty average, 240cc injectors can support about 170 crank hp if you increase the pressure to around 50psi. if you stay at 43 psi you can support about 160hp

to even make 200hp on stock injectors at the stock psi it reduced the BSFC down to .45 which is around the area of a healthy NA engine.

with that little turbo and a b16 you still should be using 310s at a minimum and 440s would be the smart choice.

Turbo-LS

iTrader: (4)

its has to do with fuel compensation tables and or fuel trim adjustments.

kyden

i actually didnt even see that part, lol. not that it has anything to do with your question.

you'll have to find a way to wire up the o2 heater if you want to use it for closed loop. or i guess wait for the sensor to warm up before starting the car.

abusedvtec

i have 02 heater disabled in closed loop

kyden

thats why the car is stuttering. the car is warm, so it tries to go in closed loop, but the sensor hasn't warmed up yet. the o2 heater disables closed loop until the sensor is ready. the plx unit outputs 14.7 until its warm. the ecu doesn't know any better.

Turbo-LS

iTrader: (4)

Thats why i dont bother with closed loop, never liked it always had issues with it on any honda based ecu ive tuned. maybe im just stupid but ive tuned many cars without closed loop being on afterwards.

My car runs spot on all the time open loop s300 no wideband feedback

racebum

why would you do this? it's going to kill your mpg

Turbo-LS

iTrader: (4)

me or the OP ? i get 30+mpg

racebum

with no closed loop?

wow, good job on the tune

Turbo-LS

iTrader: (4)

Thanks ! Yeah took alot of time getting it precise thats for sure and each season i was fine tuning coolant/intake temp calculations. I run my a/f 15.0-15.5. Its spot on all year round with all the temp changes. mmpg decreases some in the winter due to the cold air and it taking a little more fuel but thats with any car in the cold