Fuel Trim

FlashPro questions & answers specific to the 2006-2009 (US, UK, Asia) S2000
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keithd2959
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Joined: Tue May 08, 2012 8:45 am

Fuel Trim

Post by keithd2959 »

Hi!

I was wondering if there is a way (using Hondata Flashpro) keeping FUEL TRIM (Honda S2000 - 20006model) as is during the transition period between CLOSED and OPEN LOOP instead of always changing back and forth?

Any ideas guys?

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Hondata
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Re: Fuel Trim

Post by Hondata »

Can you give an example?
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keithd2959
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Re: Fuel Trim

Post by keithd2959 »

While accelerating in closed loop i am having a fuel trim of -25%, then when the closed loop changes to open loop the afr goes down to around 10 and the engine starts misfiring. Instead of changing the fuel map i was wondering if its possible that the ecu clamps that fuel trim and keeps it even during the open loop.

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Hondata
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Re: Fuel Trim

Post by Hondata »

I meant a datalog, but if you're getting a -25% fuel trim then you need to get it tuned. The fuel tables, at least in that spot, are far too rich.
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keithd2959
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Re: Fuel Trim

Post by keithd2959 »

Thanks for the info. I think that i have some excess fuel pressure so i will try to adjust the fuel pressure first before i change the fuel map. I will send you a data log shortly. Thanks

keithd2959
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Re: Fuel Trim

Post by keithd2959 »

Please find attached datalog as requested
Attachments
2nd timed run.fpdl
(397.36 KiB) Downloaded 173 times

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Hondata
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Re: Fuel Trim

Post by Hondata »

It needs fuel tuning. Why is the speed a constant 78 mph?
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keithd2959
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Re: Fuel Trim

Post by keithd2959 »

It is constantly 78mph as the engine is on an ex F3 car and it has no speedo and Honda gearbox with sensors,so we have a small adjustable circuit to simulate speed for Vtech to engage

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