Cory Simpson

OK, I'll be driving, everything up to temp, get into the boost, and once the secondary turbo kicks in, it will run between a 11.0-12.0 AFR though the throttle range (according to techedge 1.5 wideband). And once it get to .8 bar, it goes POW POW!!! And fall flat on it's face....


Is this because it is running so rich??? What AFR should I be looking for with a pull 3" exhaust, Blitz FMIC, apexi intakes, Apexi power FC, and koyo radiator (some other stuff... nothing major)


Or should I be looking at the tuning??? The Power-FC is still untuned, but being to the rich side, I'm not worried about... If I get a clean stretch of road I'll watch the commander more carfully, but for now, I can't tell you the readings right now.


Also it only seems to do this with the cooler night air, I've only had the car boosting correctly for a couple of days, and during the day, it was fine??? It may have popped off a vacume line... I'll have to check on that one

cewrx7r1

iTrader: (2)

.8bar = 11.6psi
At this boost your AFRs should be no leaner than 11.8 . Depending on your total setup, an 11.5AFR would be safer. If you are hitting 12AFR, you are not rich, you are lean! I ran 11.6AFRS at 12PSI boost but with a well tuned engine, with all the needed mods.

At night the air is cooler and the car will boost higher and if not properly tuned, AFRs usually go leaner. Proper AFR tuning requires full summer to full winter tuning so that the AIR TEMP vs INJ table is set up correctly.


You are going to pop your motor unless you get it tuned soon. That means timing and fuel. At lease add some fuel!

Do some research on this forum.

Cory Simpson

Ohh ****!


P1 auto here I come!

radkins

Sounds like you may be hitting fuel cut due to overboosting. Check your boost settings. The PFC will cut fuel at .25 over your setting, so if your setting is at .65 bar it will cut at .8.

Cory Simpson

No I had the car tuned, and now it just won't idle when it's cold!!!


Anyways, It was/is running around 1.0 bar, and it wasn't/isn't hitting fuel cut....

cewrx7r1

iTrader: (2)

You need to really read/study the PFC manual.
There are tables that YOU can tune yourself without any danger of blowing an engine. These affect starting when hot or cold, initial acceleration, and affect drivability.

I am assuming that you know/understand basic engine operational parameters.
Even if you do not, a person can learn by just experimenting.

The idle is a starting point.

Bad2ndgen

12:0 Lean at .8 bar??????

anyway.....

Check your plugs, sounds like a missfire to me. Or you are hitting some kind of fuel cut. Are you A/F ratio's going lean when it pops?

855m0n0

iTrader: (1)

12.0 is leaner then I would run at 11.6psi. I shoot for 11.5 at 10psi and 11.0 at 15psi. I wouldnt tune the car for anything in the 12s with more than 5psi. But, then again, what do I know.

Cory Simpson

I can't read my Power-FC manual... it's all in characters!!! Or most of it... I need to read the sticky up top, but man that thing is long



And one of the most annoying things it does, is the engine kind of "stalls" when you first push the gas.... Just doesn't pick up, then it goes. And if you let off the gas, then shift, and push it again, it falls on it's face for a second.

cewrx7r1

iTrader: (2)

You mean you can't read English, or is yours in Japanese?

Cory Simpson

It's in Japanese. I should stop making new retarded threads.... sorry

cewrx7r1

iTrader: (2)

E-mail me directly at cewrx7r1@yahoo.com and I will give you the ENGLISH one.

rx74evers

iTrader: (6)

I have the same concern, the car would fall on its face from a stop for a second till you give it more gas then usual. Also when shifting, anyone experience this and fix it????

GUITARJUNKIE28

either the off-idle stuff is too lean, or the throttle pump is too lean.

i'm not really experienced with the pfc, but that symptom is universal to any ems.

try giving it a little more gas in that area and it should clear it up.