Getting "sTc" (Standard Fuel Trim) error at startup

K-Series Programmable ECU installation questions / support issues
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Lambo123
Posts: 8
Joined: Fri Nov 27, 2009 2:30 pm
Location: Levittown, PA

Getting "sTc" (Standard Fuel Trim) error at startup

Post by Lambo123 »

So to start off, my setup is your basic k20a2, i/h/e/rrc/svm cam setup. The IACV is removed so i have to hold the gas upon start-up for a few minutes before it'll idle by itself. Anyways, i just fabbed up a new 3.5" intake to replace my 3" Karcepts intake due to the dyno's i've seen and the gains that people are getting just by adding a half inch diameter of intake pipe!
Well since then if i don't give it enough gas (like if i hold the gas at 1,000rpm instead of 1,500rpm) i get a CEL for "sTc" which stands for Standard Fuel Trim. Does this mean i'm getting too much gas at start up or too little? Or could this be another issue? If the CEL does come up all i do is pull over, turn the car off, turn it back on, and the cel goes away permanently. I do plan on getting a re-dyno when i can afford it. I'm wondering why a CEL would pop up because i'm getting too much or too little fuel? Is K-Pro that sensitive? Any input would be greatly appreciated. Thanks, Jeff.

Car: 1996 Civic CX w/ Hasport harness
Serial # on K-Pro - 2068-601602
K-Pro # 1137
Ecu Part # 37820-PRB-A06
K-Manager Version - 3.2.4
Bought from: k20tuned.com
The .kal attachment and datalogs are saved on my laptop i'll have to wait until i get home.
Last edited by Lambo123 on Wed Oct 09, 2013 4:06 pm, edited 2 times in total.
VSM EK Hatch
04 Type-S swap 6-spd
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Spunkster
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Re: Getting "sTc" (Standard Fuel Trim) error at startup

Post by Spunkster »

Lambo123
Posts: 8
Joined: Fri Nov 27, 2009 2:30 pm
Location: Levittown, PA

Re: Getting "sTc" (Standard Fuel Trim) error at startup

Post by Lambo123 »

I'll have to wait until i get home to get the .kal file and datalogs.
VSM EK Hatch
04 Type-S swap 6-spd
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