S14 was running perfect, now runs really rich (9.9) - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

jacobzking · 07-15-2012, 08:03 PM

I bought an enthalpy tuned ECU a few months back and its been running perfectly on my s14. but suddenly, with no modifications, it just started running too rich to even drive. idle is normal (14.6ish) but under WOT it runs around 9.9-10.0. It used to run perfectly right around 11 but not anymore. And now the car feels sluggish with the low AFR.

Pretty stock S13 SR w/ nismo t-stat, fmic, exhaust, 550s, z32, s15 t28.

Any help would be greatly appreciated. Track day in 5 days. Also, I've ran this exact setup at track day last month and the car ran like a dream.

gostrider · 07-15-2012, 08:19 PM

o2, maf maybe?

godsmack · 07-16-2012, 05:29 PM

coolant sensor

07-15-2012, 08:03 PM	#1
jacobzking Zilvia Member Join Date: Nov 2011 Location: Frisco, TX Age: 40 Posts: 288 Trader Rating: (3) Feedback Score: 3 reviews	S14 was running perfect, now runs really rich (9.9) I bought an enthalpy tuned ECU a few months back and its been running perfectly on my s14. but suddenly, with no modifications, it just started running too rich to even drive. idle is normal (14.6ish) but under WOT it runs around 9.9-10.0. It used to run perfectly right around 11 but not anymore. And now the car feels sluggish with the low AFR. Pretty stock S13 SR w/ nismo t-stat, fmic, exhaust, 550s, z32, s15 t28. Any help would be greatly appreciated. Track day in 5 days. Also, I've ran this exact setup at track day last month and the car ran like a dream.

07-15-2012, 08:19 PM	#2
gostrider Zilvia Addict Join Date: Feb 2012 Location: CFL Age: 8 Posts: 638 Trader Rating: (7) Feedback Score: 7 reviews	o2, maf maybe? __________________ *240 with illegal engine mod.*

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07-16-2012, 05:29 PM	#3
godsmack Zilvia Addict Join Date: Feb 2009 Location: Allentown, PA Age: 36 Posts: 652 Trader Rating: (0) Feedback Score: 0 reviews	coolant sensor