PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

tuned it now it cranks for 15 sec before start?

Thread Tools
 
Search this Thread
 
Old Apr 23, 2006 | 09:31 PM
  #1  
pwrtrip75's Avatar
Thread Starter
TECH Addict
20 Year Member
Liked
iTrader: (8)
 
Joined: Jan 2004
Posts: 2,386
Likes: 9
From: Janesville, WI
Default tuned it now it cranks for 15 sec before start?

Hp tuner & wideband I got the car (99 formula, 224/.581 cam, 3800 stall, headers) tuned in SD to about 14.6-14.9 A/F through out the whole rpm band.

Now when I start it, it cranks for about 15 seconds fast before it fires, then the wideband says its 12.5:1 and as it sits there it takes about 20 seconds and then the A/F magically comes up to 14.6 and is fine.

what and where do I fix the starting probs? I probably changed some parts on the VE table where it cranks, or is that it? Car started fine before, and now it runs awsome but starts hard.
Reply
Old Apr 24, 2006 | 06:25 AM
  #2  
brad8266's Avatar
TECH Senior Member
iTrader: (23)
 
Joined: Aug 2005
Posts: 8,797
Likes: 0
From: Watertown, NY
Default

You may need to change your cranking VE table.
Reply
Old Apr 24, 2006 | 09:20 AM
  #3  
Haans249's Avatar
TECH Addict
iTrader: (24)
 
Joined: May 2005
Posts: 2,045
Likes: 4
From: Fort Worth, TX
Default

Hmm, i really really hope you don't have your AFR dialed in to 14.6 in the ENTIRE rpm range. You're going to detonate your engine to death in the higher RPM ranges if you do that...

Best Regards,
Adrian
Reply
Old Apr 24, 2006 | 03:22 PM
  #4  
pwrtrip75's Avatar
Thread Starter
TECH Addict
20 Year Member
Liked
iTrader: (8)
 
Joined: Jan 2004
Posts: 2,386
Likes: 9
From: Janesville, WI
Default

14.7 is what it says its suposed to be, didnt say anything about RPM specific.

I just did some reading, WOT should be about 11.8:1 right? can i just up my PE table by .2 ? or am I going to have to retune the whole damn thing?

Also about the cranking issue, I did mess w/ the cranking VE table. nothing.
would the regular VE table have any effect on cranking?
Reply
Old Apr 24, 2006 | 03:25 PM
  #5  
white2001s10's Avatar
TECH Fanatic
iTrader: (4)
 
Joined: May 2002
Posts: 1,851
Likes: 0
From: Fairview Heights Illinois
Default

What's in your cranking-spark table?
Reply
Old Apr 24, 2006 | 04:05 PM
  #6  
pwrtrip75's Avatar
Thread Starter
TECH Addict
20 Year Member
Liked
iTrader: (8)
 
Joined: Jan 2004
Posts: 2,386
Likes: 9
From: Janesville, WI
Default

Cranking spark table is stock.

And in my PE table i would have to actually multiply everything on the right side of the decimal by 2. sound logical?
Reply
Old Apr 24, 2006 | 04:34 PM
  #7  
horist's Avatar
TECH Senior Member
 
Joined: Nov 2001
Posts: 7,036
Likes: 1
From: Lake Zurich, IL
Default

any SES lights? Specifically for the Cam position or crank position sensors?

Regarding PE table, those values are divisors into the stoich AFR... so whatever value is there, divide that into the stoich AFR (14.6xxxxx) and that's what the commanded AFR will be (works same for OLFA table)
Reply




All times are GMT -5. The time now is 10:24 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