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Jrsc k20a2 (HELP)
Posted: Tue Feb 11, 2020 7:36 am
by dan199008
So I've been having an issue with my jrsc k20a2 and I was wondering if anyone could help please,
I notice it more after accelerating and changing gear it sort of hesitates/missfires between 3500rpm and 4500rpm for a few seconds then clears, it happens at the same rpm every time so I'm clueless. changed plugs/coils tps is fine I just don't know where to start, I'll try upload a datalog because I have no idea what I'm looking for to be honest. If anyone could help I'd really appreciate it.
Re: Jrsc k20a2 (HELP)
Posted: Tue Feb 11, 2020 8:53 am
by Hondata
Your o2 sensor is not working, so it is not possible to see what the lambda is.
Re: Jrsc k20a2 (HELP)
Posted: Tue Feb 11, 2020 9:19 am
by dan199008
Is there any particular reason it would have been mapped that way? Thought I would have to run with a primary o2 sensor in working order
Re: Jrsc k20a2 (HELP)
Posted: Tue Feb 11, 2020 9:56 am
by dan199008
Hondata wrote: Tue Feb 11, 2020 8:53 am
Your o2 sensor is not working, so it is not possible to see what the lambda is.
Btw I'm in the uk so we are on narrow band I believe not wide band if that's makes a difference
Re: Jrsc k20a2 (HELP)
Posted: Tue Feb 11, 2020 10:24 am
by Spunkster
What injectors are you using?
Re: Jrsc k20a2 (HELP)
Posted: Tue Feb 11, 2020 10:34 am
by dan199008
Spunkster wrote: Tue Feb 11, 2020 10:24 am
What injectors are you using?
Rc650cc bud
Re: Jrsc k20a2 (HELP)
Posted: Tue Feb 11, 2020 11:21 am
by Spunkster
Have you discussed this issue with your tuner?
Re: Jrsc k20a2 (HELP)
Posted: Tue Feb 11, 2020 4:45 pm
by Hondata
dan199008 wrote: Tue Feb 11, 2020 9:56 am
Btw I'm in the uk so we are on narrow band I believe not wide band if that's makes a difference
Ok. Then I'd suggest adding a wideband because they are not expensive and will tell you a lot about what is going on. Given the short term trim is +-15% I think the fuel tuning is off at cruise, and it is unknown under load without the wideband.