Fuel Trim

keithd2959 · Post by **keithd2959** » Mon Mar 31, 2014 5:52 am

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?

Post by **Hondata** » Mon Mar 31, 2014 8:17 am

Can you give an example?

keithd2959 · Post by **keithd2959** » Mon Mar 31, 2014 9:58 am

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.

Post by **Hondata** » Mon Mar 31, 2014 10:09 am

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.

keithd2959 · Post by **keithd2959** » Mon Mar 31, 2014 10:35 am

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 · Post by **keithd2959** » Mon Mar 31, 2014 10:49 am

Please find attached datalog as requested

Post by **Hondata** » Mon Mar 31, 2014 12:26 pm

It needs fuel tuning. Why is the speed a constant 78 mph?

keithd2959 · Post by **keithd2959** » Mon Mar 31, 2014 3:08 pm

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

Hondata

Fuel Trim

Fuel Trim

Re: Fuel Trim

Re: Fuel Trim

Re: Fuel Trim

Re: Fuel Trim

Re: Fuel Trim

Re: Fuel Trim

Re: Fuel Trim