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why are my stft's staying so lean

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Old 07-09-2014, 08:24 AM
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You should of just brought it down. Would of sorted it in a few hours and then you could tinker with it.
Old 07-09-2014, 09:45 AM
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That's the problem...afraid to drive it in the state it's in and I have a clutch issue. I put in a lvl II monster clutch and it's slipping when I hit it a little bit so the dyno was definitely out. Monster says it just needs to be broken in 1st but I don't think that's the case? I may just pull the ecm and have you flash it for me to at least get it stable.
Old 07-09-2014, 05:39 PM
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OK did the things you told me to fix....car ran better and i made a scan from a drive Can someone help me with the next step? Ignore the speed i haven't worked on calibrating that yet.

trying.hpt

finall.hpl

Last edited by dondb; 07-09-2014 at 05:51 PM.
Old 07-09-2014, 06:45 PM
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The next step is to tune the MAF curve and VE separately. Do you have a wide band? The STFT vs MAF histo from your drive doesn't look bad though.
Old 07-09-2014, 06:52 PM
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Agreed on tuning MAF and MAP separately. The MAP is fairly easy to get done, just disable DFCO, set MAF to fail frequency, disable LTFT in tune then get lots of logging done. If have wideband, it makes life a lot easier. The FAQ's are now pretty helpful at this stage in tuning.
Old 07-10-2014, 07:09 AM
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Originally Posted by dondb
That's the problem...afraid to drive it in the state it's in and I have a clutch issue. I put in a lvl II monster clutch and it's slipping when I hit it a little bit so the dyno was definitely out. Monster says it just needs to be broken in 1st but I don't think that's the case? I may just pull the ecm and have you flash it for me to at least get it stable.
Clutch shouldn't slip at part throttles or even WOT after 10 miles at your level.

My tuning is mostly street. Doesn't matter to me but I would of tuned it within an hour and save you all this learning.
Old 07-10-2014, 05:32 PM
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I like these threads, it helps me learn. Thanks all
Old 07-11-2014, 09:39 AM
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internet has been down here after we lost power for a bit.....must be all those air conditioners sucking up the power grid? Haven't had time to do anymore...i'll update when i can.
Old 07-11-2014, 10:56 AM
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OK....I'm a dumb ***! I'm doing the poor mans smoke test....cigar and blowing the smoke into the pcv hose into the intake...getting green from the cigar might i add. See smoke coming out of the side of the front intake....holly crap there are two places for the vacuum hoses on both sides of the intake....yep thats my vacuum leak:smb: Going to start over with everything! Update soon.
Old 07-11-2014, 10:58 AM
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Haha happens to the best of us!
Old 07-11-2014, 11:01 AM
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Originally Posted by LsoneGT
Haha happens to the best of us!
Your to kind....i'm expecting worst!
Old 07-11-2014, 02:07 PM
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The car idled great and ran crappy with the vacuum leak now it won't idle and starts hard Must mean i need more air at idle?

Here's a copy of the tune in the car and a small scan around the area:

tryinginjectorpressureup.hpt tune

don.hpl scan

Trims are better...still needs a lot of tweaking!



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