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Fuel trims are weird

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Eclipse99GST

15+ Year Contributor
98
0
Nov 2, 2004
Orwigsburg, Pennsylvania
Installed the GM Maf setup yesterday and got the idle set. The only thing that is bothering me is the trims. I have 650's with the Translator set at Base=7, AUX=5. The idle I bumped to 3 to get a nice trim on the STFT. The low range from idle to 4000 rpm, the STFT is around 0.

What my question is why is the LTFT at 12? It won't go down and I thought the STFT will affect the LTFT.

Also, because of setting the MAF for 650's, my 1000 mark on the AFC is at -1. Is that right or is that too much fuel?

Thanks.

Erik
 
Did a couple runs tonight. The LTFT goes down to 8 but back up to 12. The STFT is all over the place, ranging from 20 to -14.

I need serious help from anybody who has the MAFT and 650 injectors. Do I need to reconfigure my base and aux settings?

Thanks

Erik
 
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