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Old 11-25-2010, 09:30 PM   #1

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Narrowband A/F

Had a quick question...When i had my S/C installed the shop that put it in did not install my Narrow band A/F gauge. They said im better off with the Wide-band because the narrow might mess up the ECU. Now I know for A/F readings the Wideband is the way to go, but by installing the Narrow will it mess with the ECU or any other electronics at all on the car?
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Old 12-13-2010, 03:27 PM   #2
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Did you ever find out any more info on the Narrowband A/F?

From what I can gather, the Widebands are a lot more accurate (and $$$) than a Narrowband...but since a Narrowband is just reading the voltage from the O2 sensor, I am interested to hear how it could mess with the ECU.

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Old 12-14-2010, 10:39 AM   #3
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Narrow bands are NOT an accurate way of measuring WOT A/F, ever. You can get things "close" viewing the narrowband readings, but not perfect.

A wideband is required here.
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Old 12-14-2010, 11:08 AM   #4

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The narrow bands are just good for a light show get yourself a wide band and call it a day.

Installing a narrow band however will not harm or screw with the ECU in any way.
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Old 12-14-2010, 11:21 AM   #5

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the factory o2 sensor's are only accurate at around 14.7 : 1 air fuel ratio,, they are just used for closed loop a/f operation.

when open loop(cold start) and power enrichment (WOT) , they are not used by the ecm because they cant measure any other a/f ratio accurate.
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