johnnyb305mia

Ok so i have a ZPI Stage 1 turbo kit im running rc 550cc injectors and am tuned on 10psi using F/IC. Well the car idles real lean at 17 most of the time n sometimes even goes blank n stalls alot as well. even when u go to give it any type of gas the car still remains lean never going past 15.2 from what i have seen but it never stays there it always goes to 17 or blank. There are no vac nor boost leaks anywhere or exhaust leaks either i did a boost leak test n nothing came from it...i did have an hks that was leaking so i went n replaced it with a brand new hks and the problem continues even though it was leaking b4 n now the new one doesnt. This car is my daily so i need to figure out what is causing this so the issue can be resolved please please please HELP! (No i am not driving the car like this btw)

crush02342002

iTrader: (2)

any codes, do you know fuel trims?

johnnyb305mia

i have codes in which i checked the other day b4 it went down n they were for bad gas cap, secondary o2, n crank n cam positioning i dont have an odb2 code reader on me if not i would reread them now, no i dont know the fuel trims but mike tuned me n they were great when i got tuned soooo idk i jus wanna figure this out so i can get the car back up running

m6ar2cel6oTC

sounds like my car also. scion tc ECU FTL.

crush02342002

iTrader: (2)

I would contact mike since he tuned you, he will know more about your setup than others here and should be able to point you in the right direction.

did you do anything about the cam/crank code?

crush02342002

iTrader: (2)

kinda need to see what your current codes are.

have you unplugged managment and run just the ecu?

johnnyb305mia

i jus texted mike now but u know he is very busy with work and stuff so thats y i went here to look for answers n mike jus asked me and i quote "wtf reset ecu?" soo idk i texted him back saying i have not messed with anything at all in regard to the ecu,battery,f/ic prior to this happeneing i did unplug the f/ic box from the harness n it was the same way
as far as the codes no they have always been there since like a week after i got tuned n the car runs wonderful have had no issues dealing witht that code

weezyfbayba

try unhooking the battery for 15 min then hooking it back up i had this same issue when i first went boost all of a sudden after i reset it a couple times car ran perfect

crush02342002

iTrader: (2)

i have seen with the cam/crank code you wont notice much till you get around 5,800-6,000 RPM's and you will notice a slight surging. you can see it on a datalog.
or this could be a cam sensor (i mean faulty sensor) issue maybe but i have yet to see this happen. I dont doubt it could happen though, just saying i havnt witnessed this yet.
how old is your primary o2 sensor?

johnnyb305mia

the car has 17k on it been boosted for about 6k n justin ill do that now

speedy000

iTrader: (2)

how do u have your vac lines hooked up you probly have one loose! if your gas cap cel came on thats a vac leak from there no?

crush02342002

iTrader: (2)

^^could be or it could be he just left the gas cap off after fill up...lol

johnnyb305mia

nah did complete boost leak test n nothing showed at all n the gas cap code is from having a bad gas cap i need a new one cuz it keeps comming back after u reset it

i did what justin said n reset my fuel trims n the car is up and running great for now thank u very much to all who helped

crush02342002

iTrader: (2)

good to hear

MA_70

lol +1 in 06 when my buddy had his turbo tc we would spend 20 minutes street tuning have it run awesome at wot and then drive it for the rest of the night only to have the weather slightly change and the car would correct everything we ever did the next day.

But more on topic, you speak of things that we often ran into with the car trying to change what the piggyback controller changed