Zak Shaker

hello,

I have been driving my STI type R v5 with pleasure for on year and a half, but htis week end, on an acceleration, the engine had fuel or ignition cut just before 4000 rpm. I did drive slower, then tried to floor it again, and same thing has occured.

first question, does Power FC has fuel or ignition cut for any reason ? I don't get any warning signal (engine check light)

if the boost would go .2 bar over what it is supposed to be, would ecu cut ignition/fueling ? I'm asking that cause when I did check the boost guage, it seems it was slightly boosting over just before the cut, but I'm not to shure...

any help welcome

thanks

Underworld

the car noticed its too dangerous to drive that fast on those roads....

check the error code. does the cel light on?? mine does that aswel..

or connect the green connectors under the steering..... bt u stil need to get it checked

Zak Shaker

I have an apexi power FC, not sure it send error codes through any connector
I don't get any engine check light signal. which I beleive (or at least thought) PFC use to tell any prob

FB Tuning

iTrader: (30)

You can't join the connectors under the dash for error codes when running a Power FC.

If you have the hand commander, you can look under the "etc" menu at Sensors/Switches. - If any of the monitored sensor voltages are out of the expected range, they will be highlighted in black. (the EML may/may not also be permenantly on)

The Power FC will fuel cut at 0.25 Bar over the set boost level. - What is your boost level setpoint, and what boost are you actually getting? - This may well be the cause of your problem.

HTH

Zak Shaker

thanks, I'll check commander tomorrow. I strongly think it is over boosting.
well when it did occure I had boost set up at .85 and it seems it was cuting at 1 bar. I lowered the boost to .65 and then it cuts around .85
so I beleive it has to do something with boost.
I've check solenoid, actuator lines, it seemed ok thought.
I'll have an other look tomorrow

I have 4 boost settings that I mapped in 2007 : 0.65, 0.85, 1.05, 1.25
as you can see, I'm not greedy

Jolly Green Monster

iTrader: (4)

the boost cut is 0.2bar above the target boost so either increase the target or lower the duty so it doesn't make so much boost

Simon

Zak Shaker

thanks simon,

it has been working fine for over a year thought. so I would beleive it has to come from actuator lines or faulty solenoid.

FB Tuning

iTrader: (30)

check all the lines for splits, and clean the solenoid out with brake cleaner.

check the actuator crack pressure with a mityvac or similar.

Jolly Green Monster

iTrader: (4)

sorry had a really slow connection last night so my post was out of sink..

what fiestaboy said!

joz8968

iTrader: (13)

You have the most surreal mail service, Simon!

Zak Shaker

after last check, I found out that lines going to actuator had a plit. so I have changed it. now I'm very surprised as boost is now stuck at 0.65 kg/cm2 which I know is actuator standard pressure. I guess I have ot look for the solenoid that must had a problem at the same time. quite strange all this prob at once

Jolly Green Monster

iTrader: (4)

You sure you have piped it up right?

are you on a 2port or 3port solenoid?

If 2port have you put restrictor in new pipework?

Simon

Zak Shaker

I have no idea. I guess it is 2 port.
It is standard solenoid that comes on STI type R v5

I have only changed lines that goes for compressor housing to T pieces, then from T pieces to actuator. lines that goes from T pieces to solenoid is still the same. where does restrictor is supposed to be ? don't tell me it goes in line between T pieces and actuator as I through that one in the bin

Jolly Green Monster

iTrader: (4)

Yes 2port.
It is in the pipe from compressor cover to T piece

Zak Shaker

ok great, I through that one as it was the one damaged
any picture and spec about this restrictor so I can make one ?

Jolly Green Monster

iTrader: (4)

small pill with a 0.8mm hole in

Zak Shaker

I owe you quite few beer ! I must look for a caig now

Jolly Green Monster

iTrader: (4)

no problem it is what this place is all about.

alternative is to fit a 3port boost solenoid

Simon

Zak Shaker

I remember you did mention about them a year ago. better to handle higher boost.
would they be direct fit to harness ? does PFC would be straight compatible ?

Jolly Green Monster

iTrader: (4)

you need to alter the plug but compatible with pfc