Engine bogs above 6k rpm

FlashPro questions & answers specific to the 2006-2011 Americas Civic Si
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Ntune
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Joined: Tue Dec 08, 2020 6:21 pm

Engine bogs above 6k rpm

Post by Ntune »

Hi guys i'm having some trouble finishing the tune with my turbo k20 (k20z3 fully built)... i think it could be something mechanical. After 6k rpm at wot the car bogs as the flashpro log shows. I gave it more fuel to try if that is the problem but didn't work... also tried pulling fuel but it's the same behaviour (it's like some weird limiter that shut off the injectors).
What you guys think about this?
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Spunkster
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Re: Engine bogs above 6k rpm

Post by Spunkster »

Has this been properly tuned on the dyno?

Can you post the calibration as well?

What exactly has been done in regards to modifications?
Ntune
Posts: 3
Joined: Tue Dec 08, 2020 6:21 pm

Re: Engine bogs above 6k rpm

Post by Ntune »

Spunkster wrote: Wed Dec 09, 2020 10:46 am Has this been properly tuned on the dyno?

Can you post the calibration as well?

What exactly has been done in regards to modifications?
It was tuned on the dyno until that point (i think it was the fuel pump)

Mods:
K20A2 (built bottom end) Stock head with spring and retainers
fuel system (Aem 340 lph, 8an feed, 6an return, fuel rail and regulator, id1000 injectors)
Hondata 4bar map sensor
Garret gt35
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Spunkster
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Re: Engine bogs above 6k rpm

Post by Spunkster »

Your duty cycle drops to zero and the AF ratio shows this as well. Something is telling the ECU to cut the injectors. Have you checked your wideband to make sure that the wires are not damaged/shorting?
Ntune
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Joined: Tue Dec 08, 2020 6:21 pm

Re: Engine bogs above 6k rpm

Post by Ntune »

Spunkster wrote: Tue Dec 15, 2020 5:57 pm Your duty cycle drops to zero and the AF ratio shows this as well. Something is telling the ECU to cut the injectors. Have you checked your wideband to make sure that the wires are not damaged/shorting?
It's something on the ecu.
With a friend's ecu the car runs perfect.
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Spunkster
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Re: Engine bogs above 6k rpm

Post by Spunkster »

Try going to the online menu, tools, and erase the ECU, when it finishes, turn off the ECU, close the software and reopen it then go to the New Calibration button and start with a fresh calibration and see if the problem still exists.
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