AFR displayed on Scan Tool

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Jul 11, 2002 | 06:36 PM

leirch

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Joined: Oct 2000

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From: Lima, Ohio

AFR displayed on Scan Tool

I'm having a weird AFR displayed on my scan tools, in the chip the stoich is set to 14.7 like usual, I never noticed/payed any attention but my scan tool is showing 14.6, I have an 87 maf 5spd car converted to sd, I've scanned the car with diacom/datamaster/moates with the same readings so I know its not a scan tool error, I get a good 14.7 reading off of a friends 92 z28 sd car.

Has anybody else ever seen this? I'm just wondering if that value is scewed if that anything else may be "incorrect"?

Thanks,
Brendan

Jul 12, 2002 | 01:41 PM

Grumpy

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From: In reality

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Engine: Vsick

Transmission: Janis Tranny Yank Converter

Re: AFR displayed on Scan Tool

Quote:

Originally posted by leirch
I'm having a weird AFR displayed on my scan tools, in the chip the stoich is set to 14.7 like usual, I never noticed/payed any attention but my scan tool is showing 14.6, I have an 87 maf 5spd car converted to sd, I've scanned the car with diacom/datamaster/moates with the same readings so I know its not a scan tool error, I get a good 14.7 reading off of a friends 92 z28 sd car.
Has anybody else ever seen this? I'm just wondering if that value is scewed if that anything else may be "incorrect"?

It can vary some.
Also depends on the table entry and how the scanner rounds it off.