Forced Induction Superchargers | Turbochargers | Intercoolers

Too rich and falls on its face. Sometimes ?

Thread Tools
 
Search this Thread
 
Old Jul 21, 2010 | 05:31 PM
  #1  
fastcars95's Avatar
Thread Starter
TECH Regular
iTrader: (9)
 
Joined: Apr 2008
Posts: 431
Likes: 1
From: Ontario
Default Too rich and falls on its face. Sometimes ?

I'm having a problem with my new set-up. It just started sputtering and going really rich (9.0 AFR). Its seems to be fine for about 15minutes then it starts braking up really bad. First it thought it was fouling the plugs but I pulled a couple and they looked good. Then I thought its was a second pump dumping too much fuel so I put it on a pressure switch. Nothing still. Now its going 10.0afr at partial throttle while cruising. I step on it and it goes away and pulls hard. Half the time it pulls great then its just falls apart and wont pull at all. Could I have clogged my cat?.
Any ideas.
Reply
Old Jul 21, 2010 | 07:01 PM
  #2  
98Z28CobraKiller's Avatar
Restricted User
iTrader: (17)
 
Joined: Nov 2005
Posts: 5,783
Likes: 5
From: WPB, FL
Default

is it in closed loop? Sounds like a bad o2 sensor. When they go bad, the car will usually run pig rich unless it has been tuned to run in open loop.
Reply
Old Jul 21, 2010 | 07:28 PM
  #3  
fastcars95's Avatar
Thread Starter
TECH Regular
iTrader: (9)
 
Joined: Apr 2008
Posts: 431
Likes: 1
From: Ontario
Default

Originally Posted by 98Z28CobraKiller
is it in closed loop? Sounds like a bad o2 sensor. When they go bad, the car will usually run pig rich unless it has been tuned to run in open loop.
I'm not sure. I don't have any tuning software to check. But I should take a better look at the O2 wire harness to see if I melted them. I'm also going to pull the cat tomorrow just incase I get lucky with it being plugged.
Reply
Old Jul 22, 2010 | 04:48 PM
  #4  
fastcars95's Avatar
Thread Starter
TECH Regular
iTrader: (9)
 
Joined: Apr 2008
Posts: 431
Likes: 1
From: Ontario
Default

It was the O2 sensor wire melted to the header. Fixed
Reply




All times are GMT -5. The time now is 06:48 AM.

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