Runnig Rich Or Too Lean - Chevy Cobalt Forum / Cobalt Reviews / Cobalt SS / Cobalt Parts
Engine Mods Talk about Chevy Cobalt Engine Modifications here.

Closed Thread
 
LinkBack Thread Tools Display Modes
post #1 of 17 (permalink) Old 02-02-2009, 03:04 PM Thread Starter
Cobalt Specialist
 
Join Date: Oct 2006
Location: New York
Posts: 1,388
Send a message via AIM to Chester
Lightbulb Runnig Rich Or Too Lean

I noticed that some people dont really have the full understanding of what it means when one is told that their car may be running really rich or too lean. So i am going to post this thread so people can get a better understanding. Anyone that has accurate information on this topic please feel free to post. Feel free to include what causes both and how you can tell / what the signs are if your car is running either rich or lean.



Mod's So Far: AEM CAI, C.A. Header, 2.50 Magnaflow Catback Exhaust , ZZP Catless Downpipe, DC Carbon Strut Bar, Dropped on Progress Springs. Tinted, Fully Debadged, Custom front SS bumper,2 Audiobahn 10" w/JL amp, Lower Billett Grille, Sengen 18 x 8 rims wrapped in Capitol Sport UHP 225/40/18.

Chester is offline  
Sponsored Links
Advertisement
 
post #2 of 17 (permalink) Old 02-02-2009, 03:22 PM
Cobalt Specialist
 
Join Date: Nov 2007
Location: Sunshine State
Posts: 1,250
Rich = too much fuel: wasting gas, odor of gas in exhaust -- may see black smoke in exhaust, poor performance, too much fuel can remove oil from cylinder walls and could lead to ring wear or cylinder wall scoring, poor idle.

Lean = too little fuel: creates excess heat, unusual exhaust odor, poor performance, poor idle.

Ex-Cobalt Owner
Red07SSNA is offline  
post #3 of 17 (permalink) Old 02-03-2009, 12:38 PM
Contributor
 
ConwayCobalt's Avatar
 
Join Date: Oct 2008
Location: Conway, AR
Posts: 298
Great information. Thank you!

2007 LT 2.2
MODS:
GMPP Air Intake * GMPP Extrude Honed Manifold * GMPP Cat-Back Performance Exhaust * Vibrant D/P * Jet Stage 2 Module
MOBIL 1 Synthetic Oil * DC Sport Strut Tower Brace * Color Matched Mirror Covers * EuroAntenna * 30-15 3M FX Tinting
Bridgestone Potenza Pole Position RE960AS on Premium Wheels

Future MODS:
2.4 Intake Manifold Conversion * 2.4 TB * TUNE
ConwayCobalt is offline  
 
post #4 of 17 (permalink) Old 02-03-2009, 02:23 PM
Forum Regular
 
Jimbug's Avatar
 
Join Date: Feb 2008
Posts: 129
has anyone tried this..
YouTube - Double Your Gas Mileage! 2X
Jimbug is offline  
post #5 of 17 (permalink) Old 02-03-2009, 04:14 PM
Newcomer
 
Join Date: Jan 2009
Posts: 35
Check your plugs, Not all that accurate though unless your running really lean or really rich.

Really rich = The plugs will be jet black and smell like gas
Really lean = Plugs will be bright white and have some heat spots from where it got really hot.

And if i remember correctly ideal is it will be like a light gray color and constant no weird marking or spots



05 Cobalt SS/SC, Just a Cold Air Intake For Now, But this summer..
97 Turbo 420a Talon, High 300's whp Ricer (For Sale Soon)
Car_guy_09 is offline  
post #6 of 17 (permalink) Old 02-04-2009, 06:15 PM Thread Starter
Cobalt Specialist
 
Join Date: Oct 2006
Location: New York
Posts: 1,388
Send a message via AIM to Chester
So running rich is dumping a lot more gas correct ?



Mod's So Far: AEM CAI, C.A. Header, 2.50 Magnaflow Catback Exhaust , ZZP Catless Downpipe, DC Carbon Strut Bar, Dropped on Progress Springs. Tinted, Fully Debadged, Custom front SS bumper,2 Audiobahn 10" w/JL amp, Lower Billett Grille, Sengen 18 x 8 rims wrapped in Capitol Sport UHP 225/40/18.

Chester is offline  
post #7 of 17 (permalink) Old 02-04-2009, 08:48 PM
Cobalt Specialist
 
Join Date: Nov 2007
Location: Sunshine State
Posts: 1,250
Quote:
Originally Posted by Chester View Post
So running rich is dumping a lot more gas correct ?
Right, rich means too much gas. Leaking fuel injector, too high fuel pressure (regulator bad, pump bad), really stopped up air filter element, screwed up ECM sending wrong signals to the fuel injector...

Ex-Cobalt Owner
Red07SSNA is offline  
post #8 of 17 (permalink) Old 02-04-2009, 09:54 PM
Forum Regular
 
cobaltTC05's Avatar
 
Join Date: Nov 2005
Posts: 132
Send a message via AIM to cobaltTC05
running rich is safer then running too lean

cobaltTC05 is offline  
post #9 of 17 (permalink) Old 02-04-2009, 11:35 PM
Newcomer
 
Join Date: Jan 2009
Posts: 35
Yes but running extremely rich can mess stuff up just as bad, It will wash the oil down your cylinder walls screwing everything up, but again thats only if its like so rich the car barley runs



05 Cobalt SS/SC, Just a Cold Air Intake For Now, But this summer..
97 Turbo 420a Talon, High 300's whp Ricer (For Sale Soon)
Car_guy_09 is offline  
post #10 of 17 (permalink) Old 02-04-2009, 11:36 PM
Forum Regular
 
cobaltTC05's Avatar
 
Join Date: Nov 2005
Posts: 132
Send a message via AIM to cobaltTC05
yes sir but i didnt figure these peeps where running rich enough to wash out the walls

cobaltTC05 is offline  
Sponsored Links
Advertisement
 
Closed Thread

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome