jacobcartmill

iTrader: (6)

so uhhhh i put my walbro in, and my manual boost controller in, richened up the SAFC about 4-5% in the midrange and raised the boost up to about 10 lbs (11 falling to 8 or so)

we went out for a test drive to make sure the boost wasnt spiking over 11 lbs and.... it didnt fuel cut... the boost hits about .8 bar, holds at .7 til 6000 or so then falls to about .5 by redline by redline. right where i wanted it. so the car isnt cutting fuel above 8psi... WHY? this scares me. WHY OH WHY?

i bought a nice racing beat FCD and i havent been using it cause it iwll serve no purpose til i get this figured out...

White_FC

Your obviously running the turbo ECU then?

Maybe you have a bad MAP sensor.... or the vacume hose for it is connected in the wrong spot?

HAILERS

*****
Maybe you have a bad MAP sensor.... or the vacume hose for it is connected in the
wrong spot?****

That's a good point. I'd put a meter on the input wire at the ECU and monitor the voltage when you are at full boost to find out just what is going on.

There are some voltage figures on a graph on this site: http://www.teamfc3s.org/info/articles/fcd/diy_fcd.htm

jacobcartmill

iTrader: (6)

i have a map sensor?

Scott 89t2

pressure sensor. same thing

jacobcartmill

iTrader: (6)

i checked the pressure sensor per the FSM specs and it says it should be between 1.9v and 2.2v i think. mine was at 1.88v. does that mean its bad? i was assuming thats close enough to 1.9

what does the ECU do to the engine if it sees no pressure sensor?

NZConvertible

What does it read when boosting? That's what's important. Fuel cut should be at 3.8V.

jacobcartmill

iTrader: (6)

i havent tested it while boosting but i have a feeling its nowhere near 3.8v. i wish i had some extra s5 TII stuff to swap out. also, i get a CEL every time i get above 0psi

what are the s5TII consequences for not having a pressure sensor?

BlackRx7

Carefull grasshopper!!!

where are you getting you boost signal from, what type of gauge are you useing?

It may be possible the fuel may have been removed from the ecu, if it was reprogramed.

put the stock intake back on in the mean time, or the FCD for safteys sake

jacobcartmill

iTrader: (6)

what does the series5 turboII ECU do if it doesnt see a pressure sensor signal in boost?

White_FC

It wont add more fuel or retard the timming like its supposed to...

RETed

I've ran into SEVERAL Kouki owners who have never hit fuel cut even with elevated boost levels.  Count yourself lucky (or unlucky?).


-Ted

jacobcartmill

iTrader: (6)

the only reason i consider it a problem is i'm getting a CEL when i get into boost. the CEL will not come on the whole time i'm driving the car UNLESS i get above 0psi.

Sideways7

iTrader: (7)

There was someone a while back that had his CEL go on under boost. Not sure what he figured out, though. Also, is kouki another name for the s5?

jacobcartmill

iTrader: (6)

yeah kouki is 89-91

jacobcartmill

iTrader: (6)

per the FSM:

- code 13 - pressure sensor (intake manifold pressure)
- broken wire/short circuit
- fail-safe function: intake manifold pressure input fix at 760 mmHg (29.9 inHg)

so i guess this is my problem. my engine goes out of vacuum and says "uhoh! i guess i'll throw on the check engine light!" so i'm guessing this is also throwing off my fuel maps... *goes and turns the boost down*