ideling hunting after car warmed up

FK2 Civic Type R 2015-2017, FK8 Civic Type R 2017-2021, FL5 Civic Type R 2023+ and Integra Type S 2024+
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Natious
Posts: 19
Joined: Fri May 13, 2022 2:11 am

ideling hunting after car warmed up

Post by Natious »

Hi Everyone,

I have recently had my car tuned (remote) after installing the hondata FSU & Ethanol sensor. I thought all was fine however, after the car has warmed idel is hunting, sometimes it goes away for a moment but will return. I have let the tuner know and he said it looks like its a vac leak between the maf and turbo. I have checked and could not find anything. Is this a tune problem or there is indeed a leak? I have attached some logs

cold start idle (when the idle is fine)
cold start.fpdl
warmed up idle (when its hunting)
warm idel.fpdl
and a random 2-7k pull
2-7k.fpdl
Mods are:
Prl race maf
mishimoto intercooler & piping
mishimoto radiator
... exhaust
3" front pipe
hondata fsu
dw300c intank pump
zetronix flex fuel sensor
an6 teflon fuel lines

this is my vac setup, is this correct?
vac setup.jpg
Any help would be appreciated.

Thanks.
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Spunkster
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Posts: 23878
Joined: Fri Sep 20, 2002 5:06 pm
Location: Hondata

Re: ideling hunting after car warmed up

Post by Spunkster »

Where is the MAF located. That diagram is not clear how anything is really plumbed.
Natious
Posts: 19
Joined: Fri May 13, 2022 2:11 am

Re: ideling hunting after car warmed up

Post by Natious »

Spunkster wrote: Tue Oct 10, 2023 3:54 pm Where is the MAF located. That diagram is not clear how anything is really plumbed.
Hi Spunkster, maf is located in oem position along with everything else.

I have noticed that when the AC is on the idle will return to normal, then when AC is off it will start hunting again.
Natious
Posts: 19
Joined: Fri May 13, 2022 2:11 am

Re: ideling hunting after car warmed up

Post by Natious »

Problem has been resolved by updating flashpro and tune to current software version.
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