What does it mean when an engine is running rich?

**dnunit** · 12-26-2006, 12:04 PM

Also, is running rich necessarily a good or bad thing? If it's good, what can I do to my engine to get it to "run rich"?

Thanks.

Steven. · 12-26-2006, 12:37 PM

search.

**ryanM** · 12-26-2006, 12:47 PM

running rich is when your air/fuel ratio is too rich in fuel.

BlackHopeDC5 · 12-26-2006, 12:49 PM

it means too much fuel is getting passed through and not all of it is igniting

Genuine Rolla · 12-26-2006, 01:00 PM

too much fuel isnt good, especcially when all of it isnt being burnt.

PhntmSk8r · 12-26-2006, 01:02 PM

on the other hand... its better to run rich than lean (especially at altitude)

**ryanM** · 12-26-2006, 01:13 PM

Quote:

Originally Posted by PhntmSk8r

on the other hand... its better to run rich than lean (especially at altitude)

true that, leanness kills

DAF · 12-26-2006, 02:55 PM

Quote:

Originally Posted by dnunit

Also, is running rich necessarily a good or bad thing? If it's good, what can I do to my engine to get it to "run rich"?

Thanks.

Runing rich is acutally bad. Now, ofcourse if you are boosted, you want to run more fuel, but that is to compinsate for the boost.

You want to run perfect, not lean, not rich. Running either will cause some performance loss, and running rich can cause pre-ingition problems as well as really s***ty gas milage. Id rather run lean then rich, cause your engine will last longer lean then rich. It will also cause your sensor to go bad faster (02 and what not).

Id get your 02 sensors checked out.

Shiznit · 12-26-2006, 03:12 PM

running too rich is bad, running a little rich is perfectly safe. every car in production comes from the factory a little richer than it needs to be. they all also have a catalytic converter that burns the fuel that your engine didnt ignite.

running lean is ABSOLUTELY NOT safer than running rich. its the reason why a basemap gets tuned to lean out the air fuel mixture, and why a basemap doesnt start lean and then you richen it as you tune.

running lean causes detonation... running rich does not

tex-civic · 04-30-2012, 09:54 AM

i have this same problem.... im a newbie to this can yall tell me what i should do to run perfect like what parts to switch or adjust or wat not..... would really like the advice

00siboy · 04-30-2012, 10:09 AM

Quote:

Originally Posted by Shiznit

running too rich is bad, running a little rich is perfectly safe. every car in production comes from the factory a little richer than it needs to be. they all also have a catalytic converter that burns the fuel that your engine didnt ignite.

running lean is ABSOLUTELY NOT safer than running rich. its the reason why a basemap gets tuned to lean out the air fuel mixture, and why a basemap doesnt start lean and then you richen it as you tune.

running lean causes detonation... running rich does not

^^This. Never ever is running lean a good thing. I would rather have an o2 go bad than have pinging and detonation.

**XpL0d3r** · 05-01-2012, 01:37 PM

This thread is from 2006, but as long as it stays on topic, works for me

Quote:

Originally Posted by tex-civic

i have this same problem.... im a newbie to this can yall tell me what i should do to run perfect like what parts to switch or adjust or wat not..... would really like the advice

So by problem you mean that you're running rich? How do you know? Running rich isn't entirely bad, it's much better than running lean and risking detonation.. especially in boosted vehicles. Rich will just foul out your spark plugs quicker than normal wear.

Issue possible be an issue with an o2 sensor though. Do you have a Check Engine Light (CEL) lit up?

00siboy · 05-01-2012, 05:52 PM

Quote:

Originally Posted by XpL0d3r

This thread is from 2006, but as long as it stays on topic, works for me

doh!

But like he said check codes.

12-26-2006, 12:04 PM	#1
dnunit Banned Join Date: Oct 2006 Location: NYC baby!! Posts: 56 Reputation level: 10	What does it mean when an engine is running rich? Also, is running rich necessarily a good or bad thing? If it's good, what can I do to my engine to get it to "run rich"? Thanks.

12-26-2006, 12:37 PM	#2
Steven. Formally Green 91 Join Date: Nov 2004 Location: Ellicott city md Age: 26 Posts: 14,803 Reputation level: 10	search. __________________ [CRX Build]-[My CRX Pictures]

12-26-2006, 12:49 PM	#4
BlackHopeDC5 Is Black Again??? :shock: Join Date: Jun 2004 Location: NeW York Age: 26 Posts: 7,653 Reputation level: 10	it means too much fuel is getting passed through and not all of it is igniting __________________ Yeah..... thats right... I put it in my sig b..

12-26-2006, 01:02 PM	#6
PhntmSk8r H23VTEC Join Date: Apr 2006 Location: Colorado Posts: 2,570 Reputation level: 10	on the other hand... its better to run rich than lean (especially at altitude) __________________ ALL MOTOR H23 VTEC POWERED EJ8 BUILD THREAD

12-26-2006, 03:12 PM	#9
Shiznit Stickin it to the Man Join Date: Apr 2003 Location: Arizona Age: 29 Posts: 8,801 Reputation level: 10	running too rich is bad, running a little rich is perfectly safe. every car in production comes from the factory a little richer than it needs to be. they all also have a catalytic converter that burns the fuel that your engine didnt ignite. running lean is ABSOLUTELY NOT safer than running rich. its the reason why a basemap gets tuned to lean out the air fuel mixture, and why a basemap doesnt start lean and then you richen it as you tune. running lean causes detonation... running rich does not __________________ [ EM1 Crew ] [ CCCC #0215 ] [ vB Garage ] [ CC Night Crew #0021 ] Last edited by Shiznit; 12-26-2006 at 03:15 PM.

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12-26-2006, 12:47 PM	#3
ryanM Banned Join Date: Jan 2005 Location: Midwest Age: 83 Posts: 8,984 Reputation level: 10	running rich is when your air/fuel ratio is too rich in fuel.

04-30-2012, 09:54 AM	#10
tex-civic Registered User Join Date: Apr 2012 Location: Houston Posts: 3 Reputation level: 10	i have this same problem.... im a newbie to this can yall tell me what i should do to run perfect like what parts to switch or adjust or wat not..... would really like the advice __________________ "the 1 & Only"

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What does it mean when an engine is running rich?

Engine Tech / Drivetrain