Boro FD

I've recently installed a power fc and its solved a lot of problems and smoothed out the overall drivability or my car. Only problem is it will die/stall randomly during driving. It doesnt happen often and hasnt happened during spirited driving. I am only running the base map, but it seems it could be related to braking or hills. Ive checked the connections at the ecu and theyre all good.

Any advice would be great - Karl.

Rx7_Nut13B

iTrader: (1)

What is the F/C (Fuel Cut) setting, like when you let off the gas.

does it die under load or when you go to idle.

evilg

^^^^^^ +1 above, and also:


Have you read the power FC FAQ? in specific the part about setting the screw under the throttle body.

Alternatively if it is only happening when you let off the gas from high revs and then brake, you might try adjusting your dashpot.

Or you can try raising the idle up 100rpm or so from the controller, if it is cutting out on you down there.

evilg

I just remembered that you wrote about coolant leaking from the resevoir of your FD in the 3rd gen section..... I replied to that thread but.....

This engine cutting problem, is just another pointer to the fact that your engine might not be in as good shape as you think (coolant seals?)

Boro FD

Thanks for the reply, where would I look for this setting ? is it the rev limit ?

Its dying when coming up to a stop.

I think I've sorted that coolant issue out. Seems it was a hose that wasnt fully tight allowing air into the system. As for the motor, I think its pretty strong, it only has about 5 thousand or so kilometres on it. I think you're onto something though with the dashpot/bleed screw. I sometimes get a surging idle, then it finds itself and idles fine. I'll have a go adjusting those things.

Thanks for your help, will post back when I get stuck or have solved the problem.

-Karl

evilg

The idle speeds are in the same menu (on the commander) as the rev limiter IIRC.

Glad to hear you sorted out the coolant problem.

As for the surging idle, is the engine ported in any way? if so you may have to raise the idle as par for the course (I had to with a very small street port)

Also adjusting the bleed screw is probably only a good idea before you get the PFC to learn the idle.... If it hasn't been tuned yet, you could re-initialise the PFC and then it should re - learn the idle....

Personally I have cured a very similar problem to yours by adjusting the dashpot (they lose a little stiffness after a few years) Or just raise the idle.

Whatever you raise the 3 idles to (normal, Electrical load, and A/C) make sure you have the 3 values below those ones set to at least 100 RPM more than their counterparts... that would also lead to a cut out when coming to a stop.

Let us know how you go!

cewrx7r1

iTrader: (2)

Hey NEWB, read the friggin manual!

Rx7_Nut13B

iTrader: (1)

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Boro FD

Haha, cheers. I've found a copy of the manual in english now. Its pretty vague as to what the options/functions actally do though.
I cant really find alot of information specific to setting up the fuel cut settings.

cewrx7r1

iTrader: (2)

If you understand basic carbs and fuel injection, and timing, the manual is fairly decent at describing the menues and how to use them.
You need to really READ the manual and think about what it describes.

Reread page 33.

Boro FD

Will do mate. Thanks.

Rx7_Nut13B

iTrader: (1)

I did the leg work for you

Boro FD

Legend !!

I really appreciate that dude. I've just found theres an archive of this forum, so I'll have a read through that too.

Thanks for your time.

-Karl

Rx7_Nut13B

iTrader: (1)

Yea, just dont use my F/C numbers i have a very big port job and i am not using the Idle control on the power FC that is why I have 0's in the Idle boxes. So your numbers will be lower.

Boro FD

Car hasnt stalled since I raised the fuel cut recovery numbers up.

Just wondering though, Since I'm not running a OMP (using premix), can I raise those numbers to what the actual fuel cut is ? Would that stop the fuel from cutting and would there be any negative affects from doing this ?
I just want to keep some lube going to the seals.

-Karl

Rx7_Nut13B

iTrader: (1)

You can set it as high as you want, there is a few things that will happen

1) You will probably shoot more flames when letting off high in the rpm range
2) The car may buck somewhat down low in the rpm range because there is fuel to ignite.
3) The extra fuel will help cool the turbos off.