B20v high compression AFR problems

Calibrations for S-Manager - Use all calibrations at your own risk (dyno tuning recommended)
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JByrnsCrVtec
Posts: 1
Joined: Sat Dec 21, 2019 9:14 am

B20v high compression AFR problems

Post by JByrnsCrVtec »

12.5:1 B20v vtec
Having some weird issues tuning. I am getting super rich readings on start up, like 9:1 and idling very rough and low rpm
Then once it’s up to temp it jumps rather quickly to 18:1+

Seemed to have the tune worked out a week ago but was running open pipe. Idled around 14:1 after a little feathering of the gas to keep her alive for the cold start. but just since I’ve added a muffler it seems my tune has just not been adequate.

Kind of a multi part question I guess but just looking for some insite on why a muffler would cause this crazy of a change. It’s a very free flowing “glass pack”
If I can figure out how to post data logs I can.
This is my first hondata wel Honda for that matter so haven’t learned that part yet
Hpmengine
Posts: 25
Joined: Thu Sep 05, 2019 5:22 am

Re: B20v high compression AFR problems

Post by Hpmengine »

hi friend
I need to see your records and I could see what happens to you...
publish it and we can help you..
reagrds
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