F-con help much appreciated
- Thread starter L900CMC
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sx_turbo
Lifer
it uses the fcon map sensor from what i can make out, and its the fcon that seems to be controlling the ecu
hardcoreep
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I can't say from his set up. I can only go from my experience and set up.
You can use the HKS MAP sensor with the stock computer, but you shouldn't be able to see more than boost than the fuel cut as the one I had (HKS) was a 1bar MAP sensor. When I ran using the HKS MAP sensor the car worked fine because both the FCON and the stock ECU were getting a a MAP sensor reading, but the car was still hitting the fuel cut. And when we connected the FCD both the FCON and ECU were getting the modified signal, so same problem.
I T'd the vacuum line reconnecting the ECU to its original MAP sensor and left the FCON with its MAP sensor. What happened was that the stock ECU was getting the FCD modified signal, while the FCON got the true signal and fueled accordingly. The car was able to see 22psi.
He's also correct about the fuel pressure regulator. The FCON increases the injector duty cycle past standard so using a FPR with it makes it run really rich to the point of bogging.
hardcoreep
Member +
How much boost are you running, and do you have a FCD?
Toby is a certified Starlet genius to me. So if he got it to work I'd like to know how. Maybe HKS started selling a different MAP sensor (higher bar), or its a MAP sensor for a different vehicle. Wish I still had it so I could check the part numbers with him.
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Toby@ToyTuning.com
Banned - DO NOT BUY FROM TOYTUNING
The FCON calculates IPD's using engine RPM from the OEM ECU and voltage input from the HKS map sensor not the OEM one, we used the HKS sensor alone for well over a year. I've had a few customers before using both and the cars wouldn't run especially with an afternamrket FPR.
Kev which revision FCON do you have as the latest models (3+) can alter the stock pressure signal..
T
Kev which revision FCON do you have as the latest models (3+) can alter the stock pressure signal..
T
Toby@ToyTuning.com
Banned - DO NOT BUY FROM TOYTUNING
That's an interesting discovery Rory see what you mean altough we had no issues with fuel cut using just the one, did you use FCD or BCC?
T
T
hardcoreep
Member +
I bought the EP91 FCON PowerPAK. It came with an actuator, a FCD, a PFC-FCON which included the MAP sensor. It was US$400 from HKS. My friend who was running a FCON on his Mazda 323 showed me how it worked. He ran two MAP sensors as well.
http://www.hks-power.co.jp/products/turbo/power/power_data.html
Its not longer available for the EP. So no part number.
You have to open it to see what revision it is supernova.
G6Turbo
Member +
I have a FCD and i am running around 0,9 bar of boost on a CT20 hybrid. When i first installed the F-CON i used only the HKS mapsensor but the car wouldnt even start! So i used both OEM and HKS and now it works fine.
I wil go and see if i can disconnect the OEM sensor and see what it does
hardcoreep
Member +
Is the FCD is connected to the factory MAP Sensor wire, the one on the stock ECU? With the stock MAP sensor off, the car will sputter once it hits boost. That's what mine did.
You sound to have the same set up, we had a while back.
You sound to have the same set up, we had a while back.
glanzaV195
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i have no hks map sensor, just the standard one, with a fcd, runs fine boosts clean, etc.
hardcoreep
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How much boost?
glanzaV195
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15 psi
hardcoreep
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Which is to be expected, but the problem is that you're lying to the FCON and the STOCK ECU with the FCD.
Did you open it and turn the program dial?
Did you open it and turn the program dial?
glanzaV195
Member +
i've opened it up and looked at the dial, i think its on setting 6, it was like that ever since i got the car and i'm the second uk owner of the car,i dont think the first owner even knew the f con was there so must be as it was from japan, i know the car was running rich the last time i had it rolling roaded
fastglanza
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so how come the fcon is working? did u wire in the std map sensor into the fcon? i dont tink the fcon unit will come on if its map sensor is not hooked up
glanzaV195
Member +
its hooked up 2 the stock sensor with the fcd,all hard wired in,, i guess it must be on a high setting to compensate for the fcd altering the signal to the fcon,i've seen and heard other people with it working the same as this
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fastglanza
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hmmm..odd..well once the little green light on it is on its working...
hardcoreep
Member +
The FCON will work with the stock MAP sensor. The problem is the MAP sensor is connected to the FCD which is lying to the stock ECU which is sending that incorrect data to the FCON. Obviously the previous owner just turned to one of the richer programs to compensate for the leaner signal.
That was the whole point of it running its own MAP sensor, which is it got the uncorrected signal (ie:accurate) for better metering. This was our problem. The car would run either too rich or too lean, until we re-connected the HKS MAP sensor. Ours was on 4 if I remember correctly.
That was the whole point of it running its own MAP sensor, which is it got the uncorrected signal (ie:accurate) for better metering. This was our problem. The car would run either too rich or too lean, until we re-connected the HKS MAP sensor. Ours was on 4 if I remember correctly.
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