How to tell, Rich or Lean?
10-03-2007 | 09:49 AM
#1
Thread Starter
I don't buy Kool-Aid
Joined: Apr 2004
Posts: 8,823
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From: Vegas Baby!
How to tell, Rich or Lean?
I can't find a spot to ask this question so I hope I'm in the right spot.
How do you tell if you'r car is rich or lean? what are the effects? is there a advantage? or disadvantage?
Thanks,
-Gil
How do you tell if you'r car is rich or lean? what are the effects? is there a advantage? or disadvantage?
Thanks,
-Gil
10-03-2007 | 10:22 AM
#3
Destroying Threads
Joined: Mar 2007
Posts: 2,296
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From: (swartsnegga state)
rich = when you let go off the gas you get bubly sound from exhaust like puff puff puf or you can shoot flames out the exhaust (rx8s run rich from stock)
lean = pingpong.....I mean pinging, from engine and clank clank sound
if you want to know like for real, air/fuel gauge?
lean = pingpong.....I mean pinging, from engine and clank clank sound
if you want to know like for real, air/fuel gauge?
10-03-2007 | 10:43 AM
#4
^^ Uh, no.
Burble and pop from the exhaust on decel is lean.
Once you are really experienced on the difference, you can often tell one way or the other by the smell and the color of any smoke, but generally the only way to get a useful measurement is with a proper gauge.
Burble and pop from the exhaust on decel is lean.
Once you are really experienced on the difference, you can often tell one way or the other by the smell and the color of any smoke, but generally the only way to get a useful measurement is with a proper gauge.
10-03-2007 | 10:46 AM
#5
Registered
Joined: May 2003
Posts: 1,382
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you really cant tell very well from just the drivers seat, you need some sort of gauge, like a wideband, or an air fuel gauge
really rich, you get black smoke, its bogs down
really lean, it bogs down
a little rich, is usually just less crisp throttle response, low fuel economy
a little lean, you loose throttle response, and it can ping/detonate
you'll notice they can feel the same... and frequently do
really rich, you get black smoke, its bogs down
really lean, it bogs down
a little rich, is usually just less crisp throttle response, low fuel economy
a little lean, you loose throttle response, and it can ping/detonate
you'll notice they can feel the same... and frequently do
10-06-2007 | 01:21 AM
#7
the std ecu runs the engine rich - what makes you think it would be anything else ?
10-06-2007 | 07:03 AM
#10
Thread Starter
I don't buy Kool-Aid
Joined: Apr 2004
Posts: 8,823
Likes: 2
From: Vegas Baby!
SiLVeRE8, I get it. See what Brettus and Zero_Rotary are saying is the car runs rich.
But what MM just said described is my car running lean but no smoke. Come to think of it, its a happy medum. So I'm thinking.
I tryed that it just stings me eyes.
I tryed that too just burned me hand and stings me eyes.
Don't know can't smell my own cars *** when at WOT!
So in my particular situation am I ok?
^^ Uh, no.
Burble and pop from the exhaust on decel is lean.
Once you are really experienced on the difference, you can often tell one way or the other by the smell and the color of any smoke, but generally the only way to get a useful measurement is with a proper gauge.
Burble and pop from the exhaust on decel is lean.
Once you are really experienced on the difference, you can often tell one way or the other by the smell and the color of any smoke, but generally the only way to get a useful measurement is with a proper gauge.
"Go to the rear and look at the exhaust, if its very black with thick build up, too rich. If kind of white, too lean. Optimum is in between of course. This is not very accurate as it is quite subjective from individual. Also, it can be different when idling and at full throttle. What i mentioned from the above is for crusing speed." and "Also just as simple, and to be used when stopped, is to check the exhaust fume odor. I don't mean get your head in front of the pipe and start huffing."
"Stick your hand in front of the exhaust pipe. Then smell your hand. If it smells like fumes and unburnt fuel it's rich. If it smells foul and stings your eyes a bit it's lean. Simple method, but not very accurate as to how rich or how lean unless you get really good at it."
"And if it smells like your gas is being poured right out of the back of you car, and that's when WOT, that means rich"
So in my particular situation am I ok?
04-20-2012 | 03:12 PM
#17
Rockie Mountain Newbie
Joined: Mar 2011
Posts: 1,601
Likes: 28
From: Denver, CO
But, you first need to have the CEL read.
Once you do that, you have a big clue as to what's going wrong with your car.
BC.
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