88rxn/a

iTrader: (6)

ok, so ive had my n/a with a stock s4(wastegate ported to hell) turbo with the spacer running since last (late)summer. it was running fine except lean above 6RPM's (stated in another thread)and slight hesitation. when i was using a n/a MAF,boost sensor and ECU. i switched all 3 tonight and put all hi throttle settings (safcII)to at least 20 or so for saftey reasons (i will tune them down using innovate wideband). i swapped/plugged all 3 in, fired it up and it idles much better but... i can drive if im easy on the throttle but say im in 4th gear at 1,500 RPM's and floor it the cars just goes super lean. i watched the wideband drop to 15 or more(wanst in boost)and it dogs really bad. i can get up to the speed limit no problem if i keep the pedal less than 1/4, but as soon as i hit it all it does is dog really bad. i tried adjusting the SAFCII as much as possible but it doesnt help. the one time i floored it at 1,500 RPM's and i let off and it sounded like a shotgun(backfire). could someone tell me what is going on? i thought i could plug the TII ecu in with the other 2 TII products and it would run much better but it now runs way worse.i also realize this is a hack job but ive seen many people on here run this.
TII ECU: N333
boost pressure senor: N326
MAF: not sure but seller claims there all 3 form high imp. s4 TII(letters are worn off)
my car is high imp. so i have hi imp. 550's which i used even befoe the TII ecu stuff was installed and 720's wiht resistors in the wires near ecu.
my mods:
s4 stock turbo(ported wastegate) and manifold
spacer for manifold
550
720
no rats nest
tmic converted to fmic wiht 2 inch piping
greddy type s bov
fd fuel pump
innovate wideband
SAFCII
i have more but i figure they dont matter in this situation.

iceblue

Can you bypass your SAFC to run only the ECU?

There is a possibility there is something in the AFM its not likely so I won’t post it until the Fuel delivery has been covered.

KompressorLOgic

iTrader: (6)

well part of your problem seems to be your pressure/boost sensor,!!

a N326 pressure/boost sensor is for a NA!!!! which is only a 1 bar sensor range from -14.7 to 0 pressure with a range of signal from 0-5 volts( well its something like that)


a real TURBO II sensor a N318 goes from -14.7 to positive 14.7. with the same range of voltage 0-5 volts(somewhere around there...)

meaning.... if your going to zero vacume or positive pressure the NA sensor is sending the ecu 5 volts, instead of 2.5 ,so the ecu thinks your running 14 psi!!!! which is prolly cutting fuel to the rear rotor, do you have a FCD??


impedance wont matter to the ECU all 2nd gen ECU are designed to see high impedance, wetiher its be using high imp injectors, or having low imp + resistor pack.

did u also unplug some of the emissions things from the ECU, theres a few things pins that are different in a T2 ecu

88rxn/a

iTrader: (6)

damn, so i bought a n/a sensor??? ugh... no wonder...that kinda makes sense.. i do not have a FCD as i only wanted to get it running better... thank god i wasnt boosting! i made sure to stay below 2,000 rpm's for the sake of fuel cut. i want to test the ecu before sending it to pocketlogger for the rtek 1.7... i could bypass the safc just by either unpluging the harness or setting to 0's acrossed the range.

88rxn/a

iTrader: (6)

the thing i dont understand is that if its thinking im hitting such a hi boost wouldnt it add tons of fuel??? or is it getting so lean because of fuel cut??

adrock3217

Fuel cut is when the ECU cuts ALL fuel to the rear rotor. Not lean, not rich, NONE.

88rxn/a

iTrader: (6)

ok, i see...thanks!
i guess ill buy a tII pressure sensor and see what happens.

iceblue

I never remember the numbers since kompressorlogic knew the PS I looked up the ECU for you just so you know it is a TII ECU therefore it is capable of delivering FC.

And 0InHg is very easy to reach.

88rxn/a

iTrader: (6)

yeah, thats where i messed up!! i assumed that the sensor was right since the guy on here said it was... should have done my homework and searched!!

88rxn/a

iTrader: (6)

ok...got the tII sensor and no more fuel cut..now i can turn the safc way down because it runs very rich up top..before it was running very lean even with 720's.. now i get cutting out at 6K im thinkin because of plugs are fouled.. i will get plug wires to to help the problem. it runs so much better except i get some bucking hesitation under very light load around 2K.. i either have to down shift or goose the gas.. is this fixable or is it maybe because of the hack job i have going on?? it also wants to stall out when i roll to a stop with clutch in. i actually have the safc up to 12 or 13 on low setting just to get the a/f reading at 13. without turning it up its like 15.5 or higher.