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feeling power loss.. please help..

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Old 07-20-2010 | 11:39 PM
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From: van nuys CA
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so here is my current log.. i have efi but i cannot tune at all.. i cant even read the file.. can someone look at it and tell me if its off? it hasnt been adjusted by justin but im hearing that only thing they do is raise tq lock up so it wont bother me on the street.. some one help.. or i might just go back to my 3.73 gears.. those pulled super hard in second gear
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alex with stall long.efi (329.0 KB, 80 views)
Old 07-20-2010 | 11:50 PM
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dude i say run it at the track thursday and see if it picked up anything. also when justin sends your tune update that will help alot
Old 07-20-2010 | 11:55 PM
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From: van nuys CA
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but even if it did... i wont be happy.. its slow on the top end... like super slow compared to before... i ran my brother on the street..i jump harder on him but he keeps up.. before i would slowly pull away but i would keep pulling all the way to 100.. eventually be 4-5 trucks ahead..now im only 3... but i guess ill just wait on that tune before freaking out..
Old 07-20-2010 | 11:56 PM
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has justin sent the tune adjustments yet?
Old 07-21-2010 | 12:10 AM
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not sure why it feels like its losing power but one thing i see in the log is your really close to maxing your injectors out at 97% and your only showing 99.2% throttle.

Another thing towards the end when you were stalling it up iats were above 100 degrees, that can be pulling timing a fair amount causing it to feel sluggish

Last edited by Black'Rado; 07-21-2010 at 12:20 AM.
Old 07-21-2010 | 12:21 AM
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From: van nuys CA
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well i dont know how to read that tune but i say its slower because im going off how it use to perform before to now.. when i raced my brother i only left him by 3 trucks when i use to leave him by 5... i raced my cuzen before and after the gear and stall swap and he use to leave me on launch then i would stay behind him all the way till 100... now i leave rt next to him but like at 70 he passes me HARD! and leaves me by like 4 trucks... thats y i say its slower... and i dont get the TPS only says 99.2.. how do i open it to 100%..lol.. i mean i stuff it all the way down.. thats just all it opens..lol
Old 07-21-2010 | 12:32 AM
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From: van nuys CA
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i believe this is a short log of my old set up...
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gmc sierra2.efi (220.4 KB, 72 views)
Old 07-21-2010 | 01:06 AM
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From: van nuys CA
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and no justin hasnt sent me updated tune... prolly still moving..
Old 07-21-2010 | 08:20 AM
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Well comparing both logs, i was wrong, your hitting basically the same spots on the spark table, well best i can figure, you did not log the correct PID to be absolutely certain. Speaking of spark, in both logs your timing dips pretty hard between 4000-6000 in both logs. There is a little bit of difference due to the IATs, but 19-20* of timing at 5600 is really low, honestly i think that is less than stock. Are you running 87 octane?

Last edited by BlackGMC; 07-21-2010 at 08:28 AM.
Old 07-21-2010 | 08:49 AM
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From: van nuys CA
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no im running 91.. and about logs well idk.. all i can think of not knowing much about tuning is that 3200 stall is slipping not letting me put down the power to the wheels.. is their a way to lock torque converter in 2nd.... may b try to c how that feel.. altho everything is still similar on both logs.. truck is slower... that i know for a fact.. sorry guys its just that im not happy with my outcome.. thanks for the help..


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