PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

Cold Start Open-Loop

Thread Tools
 
Search this Thread
 
Old Nov 13, 2003 | 11:22 PM
  #1  
Ed Blown Vert's Avatar
Thread Starter
11 Second Club
20 Year Member
Photogenic
iTrader: (2)
 
Joined: Nov 2001
Posts: 3,066
Likes: 0
From: Sunny San Diego
Default Cold Start Open-Loop

Since I installed my headers and lowered my IFR to get my LTFT's negative. My cold starts sucks. I am really rich and the car will not idle till it gets into closed-loop.

What can I do to lean it out when cold and open loop?
Reply
Old Nov 14, 2003 | 08:38 AM
  #2  
Richard@WCCH's Avatar
Banned
iTrader: (3)
 
Joined: May 2002
Posts: 1,853
Likes: 5
From: Van Nuys, CA
Default

You could try lowering the MVE table in the 25-50kpa MAP and 400-1200rpm range. Lower the 400rpm column by 30-40%, the 800rpm column by 20-30% and the 1200rpm column by 10-20%. Although I think this mod works better for hot starts. I recently leaned out the IFR table on my car in the MAP range of 25kpa to 45kpa and cold starts are very nice now.

Good luck.

Richard
Reply
Old Nov 14, 2003 | 08:55 AM
  #3  
Ed Blown Vert's Avatar
Thread Starter
11 Second Club
20 Year Member
Photogenic
iTrader: (2)
 
Joined: Nov 2001
Posts: 3,066
Likes: 0
From: Sunny San Diego
Default

I'll try that, but I hope it doesn't mess up my idle when I am in closed loop.

I should also say, it happens on a warm start. But alway in open-loop.
Reply




All times are GMT -5. The time now is 05:13 PM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE