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Just wondering....how accurate?

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Old Mar 11, 2008 | 10:09 PM
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Originally Posted by BlackGMC
Have you tuned your VE table using the fuel trims?
I didn't tune the fuel or anything like that all i ahve done is make a few idle changes and shift points tcc lock etc etc.
A sponsor from this board tuned the truck we had a bit of a disagreement and don't speak as of now.
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Old Mar 11, 2008 | 10:12 PM
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sorry to hear about the tuner problems, that sucks. Did he do a live tune or mail order? IMO you should look up how to tune the VE table using the fuel trims... This will be the starting point of your tune. Next tune the MAF table using the fuel trims... Having the VE and MAF table tuned correctly will allow you to command what PE values you want and it will be accurate...
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Old Mar 11, 2008 | 10:17 PM
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Originally Posted by BlackGMC
sorry to hear about the tuner problems, that sucks. Did he do a live tune or mail order? IMO you should look up how to tune the VE table using the fuel trims... This will be the starting point of your tune. Next tune the MAF table using the fuel trims... Having the VE and MAF table tuned correctly will allow you to command what PE values you want and it will be accurate...
Anyway to adjust what is already there without starting over?
He did a live tune with a wideband and so on.
wish you could see the tune.....damn you and ur efilive haha.
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Old Mar 11, 2008 | 10:22 PM
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Originally Posted by TouchOfEvil04
Anyway to adjust what is already there without starting over?
He did a live tune with a wideband and so on.
wish you could see the tune.....damn you and ur efilive haha.
Sorry man, I know us EFI Live guys are few.....

If he did tune the VE and MAF tables with the wideband then whatever you command in your PE table is the AFR you will get... How accurate those tables are is how accurate your tune will be.

Tuning the VE amd MAF table would not be considered starting over just adjusting...
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Old Mar 11, 2008 | 10:25 PM
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got a link on a how to i can take a looksie at?
I got the truck down for the moment, gotta redo my rockers as i forgot to rotate the motor and retorque after the instal....blahblah...stupid truck.
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Old Mar 11, 2008 | 10:28 PM
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Originally Posted by TouchOfEvil04
got a link on a how to i can take a looksie at?
I got the truck down for the moment, gotta redo my rockers as i forgot to rotate the motor and retorque after the instal....blahblah...stupid truck.

Tune the Trims, then the MAF then the PE..

https://www.performancetrucks.net/fo...d.php?t=346549
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Old Mar 11, 2008 | 10:30 PM
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thanks man.
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Old Mar 11, 2008 | 10:31 PM
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sure, wish I could help more, those documents should keep you busy for a little while..
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Old Mar 11, 2008 | 10:32 PM
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i see it says over a course of 4-5 days...ya that should keep me on my toes a little.
Might have to get the gf to log the rcsb as well so i can get both trucks tuned properly lol.
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Old Mar 12, 2008 | 05:15 AM
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You cant rely on your 02's for fueling much at all, I have seen 02 readings of 910mv be anywhere from 11.5afr to 13.9 afr. Thats a big error.. Until I got a wideband I didnt realize how much of a guess it really is without one.
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