PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

why are my stft's staying so lean

Thread Tools
 
Search this Thread
 
Old Jul 9, 2014 | 08:24 AM
  #21  
Slowhawk's Avatar
LS1Tech Sponsor
iTrader: (12)
 
Joined: Nov 2001
Posts: 14,865
Likes: 6
From: Bridgewater,Ma
Default

You should of just brought it down. Would of sorted it in a few hours and then you could tinker with it.
Reply
Old Jul 9, 2014 | 09:45 AM
  #22  
dondb's Avatar
Thread Starter
TECH Apprentice
iTrader: (1)
 
Joined: Feb 2008
Posts: 354
Likes: 0
From: Seacoast of NH
Default

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.
Reply
Old Jul 9, 2014 | 05:39 PM
  #23  
dondb's Avatar
Thread Starter
TECH Apprentice
iTrader: (1)
 
Joined: Feb 2008
Posts: 354
Likes: 0
From: Seacoast of NH
Default

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; Jul 9, 2014 at 05:51 PM.
Reply
Old Jul 9, 2014 | 06:45 PM
  #24  
Fall Line's Avatar
Teching In
iTrader: (5)
 
Joined: Aug 2009
Posts: 46
Likes: 0
From: Tewksbury, MA
Default

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.
Reply
Old Jul 9, 2014 | 06:52 PM
  #25  
SladeX's Avatar
TECH Addict
15 Year Member
 
Joined: Nov 2005
Posts: 2,379
Likes: 2
Default

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.
Reply
Old Jul 10, 2014 | 07:09 AM
  #26  
Slowhawk's Avatar
LS1Tech Sponsor
iTrader: (12)
 
Joined: Nov 2001
Posts: 14,865
Likes: 6
From: Bridgewater,Ma
Default

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.
Reply
Old Jul 10, 2014 | 05:32 PM
  #27  
rpturbo's Avatar
TECH Addict
15 Year Member
Photogenic
Liked
Loved
iTrader: (47)
 
Joined: Nov 2008
Posts: 2,424
Likes: 229
From: A-Town, Ill side
Default

I like these threads, it helps me learn. Thanks all
Reply
Old Jul 11, 2014 | 09:39 AM
  #28  
dondb's Avatar
Thread Starter
TECH Apprentice
iTrader: (1)
 
Joined: Feb 2008
Posts: 354
Likes: 0
From: Seacoast of NH
Default

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.
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

 Pouria Savadkouei
story-1

Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

 Verdad Gallardo
story-2

7 Most Reliable High-Performance Engines GM Has Ever Built

 Verdad Gallardo
story-3

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-4

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-5

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-6

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-7

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-8

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-9

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
Old Jul 11, 2014 | 10:56 AM
  #29  
dondb's Avatar
Thread Starter
TECH Apprentice
iTrader: (1)
 
Joined: Feb 2008
Posts: 354
Likes: 0
From: Seacoast of NH
Default

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.
Reply
Old Jul 11, 2014 | 10:58 AM
  #30  
LsoneGT's Avatar
Launching!
iTrader: (2)
 
Joined: Jan 2013
Posts: 228
Likes: 1
Default

Haha happens to the best of us!
Reply
Old Jul 11, 2014 | 11:01 AM
  #31  
dondb's Avatar
Thread Starter
TECH Apprentice
iTrader: (1)
 
Joined: Feb 2008
Posts: 354
Likes: 0
From: Seacoast of NH
Default

Originally Posted by LsoneGT
Haha happens to the best of us!
Your to kind....i'm expecting worst!
Reply
Old Jul 11, 2014 | 02:07 PM
  #32  
dondb's Avatar
Thread Starter
TECH Apprentice
iTrader: (1)
 
Joined: Feb 2008
Posts: 354
Likes: 0
From: Seacoast of NH
Default

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!
Reply




All times are GMT -5. The time now is 02:25 PM.

story-0
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Slideshow: We take a close look at the ONE and Artidiag 800BT2 diagnostic tools from Topdon and the reasons to buy one over the other.

By Pouria Savadkouei | 2026-05-28 11:05:11


VIEW MORE
story-1
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.

By Verdad Gallardo | 2026-05-26 18:23:54


VIEW MORE
story-2
7 Most Reliable High-Performance Engines GM Has Ever Built

Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.

By Verdad Gallardo | 2026-05-21 16:45:27


VIEW MORE
story-3
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-4
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-5
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-6
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-7
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-8
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-9
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE