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put in new plugs, fuel trims off...help?!

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Old 11-05-2003, 06:39 PM
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Default put in new plugs, fuel trims off...help?!

ok i put in new plugs, i had a problem of running lean before and figured i might have messed up some plugs. well it fires a lot better now but here is the thing. before i would go out and the mV on the o2 read 870 and now they read about 900. the fuel trims were at about -1.56 or -.78 and now they went there once but then went right back to aobut -6 or so. will it just take time for the computer to adjust to the new plugs? should i just check again in about a week or so? just wanna make sure thats normal
Old 11-05-2003, 06:58 PM
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please guys, im gonna run at the strip tomorrow just wanna make sure its not gonna hurt anything
Old 11-05-2003, 08:47 PM
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come on someone has to have some idea on programing...i really need to know
Old 11-05-2003, 08:57 PM
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Originally Posted by WS6FirebirdTA00
please guys, im gonna run at the strip tomorrow just wanna make sure its not gonna hurt anything
It's all normal. In fact you're a little richer, therefore safer. Keep in mind the 02's are not a good AFR tuning tool.
Did you disconnect the battery. It might be re-learning.
Old 11-05-2003, 09:01 PM
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ok thanks for the info. no i didnt disconnect it yet. i jsut wanted to make sure it was relearning. now here is another question, if the fuel trims went from -6 to 0 would that make the WOT fuel leaner?
Old 11-05-2003, 10:14 PM
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I presume you are talking LTFT's. If it's STFT then the computer is simply relearning. If LTFT's are positive, then you are probably running lean, negative - rich, 0 - perfect.

Also [obviously] at WOT you only need to pay attention to WOT cell (#22).
Old 11-05-2003, 10:23 PM
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yes i am talkin about LTrims but they are jumping a lot. ill give it a few days
Old 11-05-2003, 11:10 PM
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Originally Posted by WS6FirebirdTA00
ok thanks for the info. no i didnt disconnect it yet. i jsut wanted to make sure it was relearning. now here is another question, if the fuel trims went from -6 to 0 would that make the WOT fuel leaner?

If the ltrims changed on their own it would not effect WOT.




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