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Old 03-18-2009, 05:50 PM   #1
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Default AFR different in logs then what laptop gauge reads?

I知 at work right now so I知 going to try and make this quick before my boss notices.

I have not made any logs in about a month. I noticed my car had a slight hesitation when cruising on the highway the other day so I made some logs last night. VE analyzer wanted to add some fuel everywhere. After a few more logs and it kept wanting to add more and more fuel when in boost. My boost cells went from about 115 to 150. I made the changes to the map to see what happens and made another log. VE analyzer wants to add more fuel when in boost but when making the logs noticed the car feels too rich. It would load up when in boost and not pull as hard.

Here痴 the odd thing. My logs show 12 - 11.8 AFR when in boost but when I look at the gauge on the laptop it reads 10.1 to 9.8 when in boost. I致e made no other changes to the car or the tune in the past few months. When I get back from work I値l post up some logs and my old and current map if needed.
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Old 03-18-2009, 05:53 PM   #2
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remove some variable.

log yourself just sitting there at idle. watch the laptop for a few seconds. compare the readings in your log.
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Old 03-18-2009, 10:29 PM   #3
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Just logged idle.

Laptop gauge was showing 11.5 during warm up. Log showed 12.7
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Old 03-19-2009, 12:58 AM   #4
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ok, at some point in time the wideband setting in my MLV changed from LC-1 default to LC-1 0-5V. This made the logs seam leaner then they really were. VE analyzer kept wanting to add fuel.

I'm an idiot

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Old 03-19-2009, 10:50 AM   #5
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stuff happens. at least you figured it out.
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