PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

Headers installed, car won't go into CL mode....

Thread Tools
 
Search this Thread
 
Old Aug 22, 2007 | 10:43 PM
  #1  
Viperguynick's Avatar
Thread Starter
Staging Lane
iTrader: (8)
 
Joined: May 2006
Posts: 70
Likes: 0
From: Lisbon Falls, Maine!
Default Headers installed, car won't go into CL mode....

Any ideas on what might be causing this problem? I just got done installing my XS Stainless headers, and now the car stays in open loop. Both of my 02's are working and LTFT's are adjusting themselves accordingly, but the car just stays in open loop. Any ideas?

Nick
Reply
Old Aug 23, 2007 | 04:20 AM
  #2  
Doc's Avatar
Doc
FormerVendor
iTrader: (9)
 
Joined: May 2003
Posts: 1,573
Likes: 0
From: Jacksonville, Fl
Default

Originally Posted by Viperguynick
Both of my 02's are working and LTFT's are adjusting themselves accordingly, Any ideas?

Nick
You just met my definition of closed loop fueling...O2s online, providing STFT data that the pcm is making LTFT adjustments with.

What are you talking about?
Reply
Old Aug 23, 2007 | 08:59 AM
  #3  
Viperguynick's Avatar
Thread Starter
Staging Lane
iTrader: (8)
 
Joined: May 2006
Posts: 70
Likes: 0
From: Lisbon Falls, Maine!
Default

Well, while scanning the car with EFI-Live, my fueling mode indicators stay showing open loop. I realize that it is theoretically working in Closed Loop due to the LTFT values chaning, it's just those two little indicator lights that are bugging the hell out of me, I have never seen the car do that before.


Nick
Reply
Old Aug 23, 2007 | 10:54 PM
  #4  
Shallow Bay's Avatar
TECH Resident
iTrader: (3)
 
Joined: Jul 2005
Posts: 878
Likes: 1
From: Twin Cities, MN
Default

That doesn't make any sense. Can you post your current tune and a scan of the car while this is happening?
Reply
Old Aug 23, 2007 | 11:23 PM
  #5  
Viperguynick's Avatar
Thread Starter
Staging Lane
iTrader: (8)
 
Joined: May 2006
Posts: 70
Likes: 0
From: Lisbon Falls, Maine!
Default

Well, thanks for the interest guys, but I managed to watch the car switch to CL after about 15 minutes of driving. Since then, the car seems to switch to CL as quickly as it did before. I am however, having another problem with my LTFT's that I will be making a new post about shortly. Thanks again!

Nick
Reply




All times are GMT -5. The time now is 12:14 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