blackrotary23

i modded an s4 t2 lower intake to fit my n/a s4 block. everything matches up perfect. my problem is that when i start the car, it runs rich as hell and doesnt have the horsepower it did with the stock n/a intake.

parts added to the car with the intake setup:
t2 injectors
t2 pressure/boost sensor

stock parts:
fuel pump
afm
and everything else is n/a as well

i have an safcII installed and leaned out the fuel as much as i could to get it to run and drive safely, but when i try to give it full throttle, it barely moves and struggles to get past 5500 rpms.

also, where does the brake booster vacuum line attach to? my pedal is very still as if i dont have any brakes at all.

PLEASE HELP>>>>>>

SpeedOfLife

iTrader: (16)

did you replace the NA pressure sensor with the T2 one or was that just for the SAFC to use?

RotaryRocket88

iTrader: (7)

You shouldn't be using a TII MAP sensor with an NA ECU. The voltage scales are totally different, which will mess with the mixture.

What's the max correction for an SAFC? You're now running 12% larger injectors, so hopefully it's at least that much. Also keep in mind that large adjustments on an SAFC mean large negative affects on timing. Leaning the mixture will mean timing advance, and enriching the mixture will mean timing retard.

You can use the J-spec LIM brake booster line location if you drill/tap it, then use your NA banjo bolt and hardline. US LIMs had an extra metal hardline on the backside of the engine, which routed to the intake completely differently.

K-Tune

iTrader: (26)

Why are you using turbo injectors?

blackrotary23

i am going to put the turbo on in the next couple of weeks so i figured i would start by doing to easy stuff first with the intention of driving it until the turbo goes on. should i just run the stock injectors until i put the turbo on? and will i also have to use a TII fuel pump with the TII injectors as well?

RotaryRocket88

iTrader: (7)

If you're using TII injectors, use a TII ECU.

What is your intention with this setup? Are you using a stock turbo? Hybrid? Or other aftermarket? If stock turbo, just get an FD fuel pump and put it in now.

blackrotary23

i am installing the stock turbo. n/a to turbo setup.

so i will need to get an fd fuel pump, and a TII ecu once i put the turbo on?
if so, then until i get the turbo on, should i just run the stock injectors? then once i get the rest of it together, put in the fuel pump, ecu and injectors? i already have the TII boost sensor and maf.

blackrotary23

ok, so i tapped the lower intake for the brake booster line and it works perfect!

i also took out the TII fuel injectors and put the n/a's back in and the car still has no get up and go.

here is a question.................would it have anything to do with me not disconnecting the battery before doing all this **** to the engine? could it be reading a code and not letting it receive its full potential? i disconnected the tps, fuel injectors, air intake temp sensor, mass air flow meter, and the map/boost/pressure sensor with the battery still connected

blackrotary23

ok, since nobody wants to answer my retarded questions..........................

if i am running a TII intake, TII fuel rails, n/a injectors, TII fuel pump, TII tps, TII maf, and a TII ecu, should i still have the same hp as if i had all N/A parts? the reason i ask is because i have switched out numerous parts since i put the TII intake on and there is no change in my lack of horsepower. the engine has trouble getting up to speed and does very poorly at reaching 8000 rpms. never had this problem with the stock intake. is it the way that the fuel and air is delivered through the intake, without the turbo to make up for the difference ?

blackrotary23

any ideas?....................anyone?

Grappler

iTrader: (6)

Its because the 5/6th port alter timing so you have more low end power when you put the turbo LIM you took out those ports and now those ports are always open so you won't have the same power band as before.

blackrotary23

i had the 5th and 6th port sleeves out when i had the n/a intake on.

gameover2145

iTrader: (1)

Unless I missed something, I think a big part problem is that you're mixing TII and NA electronics (Pressure sensor, ECU, TPS, MAF, etc). They need to all be the same, either all TII or all NA.

blackrotary23

gotcha! the the electronics that are TII on the car right now are the tps, mass air flow meter, and fuel pump.