Lean and rich sr20det issue - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Tyler_240 · 04-01-2016, 06:25 AM

15 AFR isn't that lean at cruise, especially off throttle its going to pull fuel... if your WOT is 13 that is lean for sure, but 11.8 is perfect...are you datalogging this or trying to watch the AFR Gauge? Watching it is not going to work for you...

I would verify your base timing and your vacuum seems a little low, maybe you have a boost leak. I usually pull minimum of -20 at idle

I would follow the frsport guide and double check your timing...if you haven't gotten a tune since the mail order ecu, I would definitely recommend it...it is not going to be 100% precision like a standalone

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04-01-2016, 06:25 AM	#1
Tyler_240 Zilvia Member Join Date: Feb 2005 Location: Gainesville, FL Posts: 239 Trader Rating: (9) Feedback Score: 9 reviews	15 AFR isn't that lean at cruise, especially off throttle its going to pull fuel... if your WOT is 13 that is lean for sure, but 11.8 is perfect...are you datalogging this or trying to watch the AFR Gauge? Watching it is not going to work for you... I would verify your base timing and your vacuum seems a little low, maybe you have a boost leak. I usually pull minimum of -20 at idle I would follow the frsport guide and double check your timing...if you haven't gotten a tune since the mail order ecu, I would definitely recommend it...it is not going to be 100% precision like a standalone