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my 88 gxl has the safc set to 6 in 6 out on the flapper door....

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my 88 gxl has the safc set to 6 in 6 out on the flapper door....

Old 01-18-07, 12:59 AM
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my 88 gxl has the safc set to 6 in 6 out on the flapper door....

when i change it to 5 in 5 out will i have to re adjust my fuel settings?
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Old 01-18-07, 01:14 AM
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i never did quite understand the whole in/out adjustment but i would imagine it is the voltage in vs voltage out, since it is a 5 volt reference signal and is going to be unmodified is what i assume they use it for.

switching it from 6 volts to 5 volts means you likely will have to make some minor adjustments to compensate for the new linear tables.
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Old 01-20-07, 12:14 AM
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Ya im not to sure either, it explains it in the manual pretty good.

Although I found the engine ran no different between the 2 settings. If I had it set to 5, 5 or 6, 6.

I wouldn't set it wrong though there is a reason APEXi tells you to set it that way.

You have a S4 ECU so you should have it on 5 - 5. I wouldn't worry to much about having to change the fuel setting when changing it to 5 - 5. Just start it up and see how it runs. You can always bring the corrections down or up a few notches depending on if you have spots richer or leaner.
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