01-31-2010
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#1
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The Russian Stub
Join Date: Oct 2009
Location: Cedar, MN
Drives: 2001 Celica, 2005 Evo
Posts: 177
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Am I burning lean or REALLY lean?
My car seems to go threw spark plaus every 4,000 miles. I thought I was burning really rich because my gas mileage sucks, and it smells like it. Something isnt right though.
Last 2 times I have changed my spark plags, the seem to come out whiteish. I changed my plugs last time because my car seems to misfire when they start going bad. The last time I changed my plugs the misfiring went away. Yesterday it went away. It is back today...
I didnt think I was burning lean the first time I changed my plugs. I just thought it was the Amsoil P.I. I put in there. Well my plugs tell a different story.
Here is the one I just pulled out. I only pulled 1 out because I didnt have time to pull the rest. Going to the Wolves game. Let me know what you guys think.
(Seems like best lighting is in my bathroom...)
Here is an old one with about 3 - 4000 miles on it (right) vs. a new one with maybe 100 - 150 miles on it... (left)
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01-31-2010
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#2
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Join Date: Sep 2006
Location: new brighton
Drives: 04 evo
Posts: 1,212
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Re: Am I burning lean or REALLY lean?
Get your car tuned. You shouldnt be having problems going through plugs since your setup is so basic.
__________________
03 as evo-sold
04 bby ssl-sold
05 ww mr-sold
03 tb evo- current
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01-31-2010
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#3
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Shit Rocket Pilot
Join Date: Oct 2003
Location: Shoreview, MN
Drives: 2003 Evolution VIII
Posts: 7,752
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Re: Am I burning lean or REALLY lean?
Those look good to me. *shrug* Mine look the same and have probably 10,000+ on them.
__________________
"If everything seems under control, you're just not going fast enough." -Mario Andretti
03 Mitsubishi Lancer Evolution VIII
Quote:
Originally Posted by Tachyon
Every minute you spend in your Evo, not in boost, is a minute of your life you'll never get back.
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01-31-2010
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#4
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The Russian Stub
Join Date: Oct 2009
Location: Cedar, MN
Drives: 2001 Celica, 2005 Evo
Posts: 177
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Re: Am I burning lean or REALLY lean?
Quote:
Originally Posted by mike55112
Get your car tuned. You shouldnt be having problems going through plugs since your setup is so basic.
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Do you remember when we were coming back from Michigan and you said my car sounds like its burning rich? the exhaust still smells like that but my plugs dont seem to show evidence of it burning rich.
Quote:
Originally Posted by Matt D.
Those look good to me. *shrug* Mine look the same and have probably 10,000+ on them.
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Then I wonder why they keep misfiring. Around 3 - 4000 miles they start to misfire. When I replace them, the misifring goes away. This time it didnt i guess...
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01-31-2010
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#5
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Shit Rocket Pilot
Join Date: Oct 2003
Location: Shoreview, MN
Drives: 2003 Evolution VIII
Posts: 7,752
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Re: Am I burning lean or REALLY lean?
Sounds like it's rich? Please tell me how you can hear such a thing.
Are your plugs gapped correctly?
__________________
"If everything seems under control, you're just not going fast enough." -Mario Andretti
03 Mitsubishi Lancer Evolution VIII
Quote:
Originally Posted by Tachyon
Every minute you spend in your Evo, not in boost, is a minute of your life you'll never get back.
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01-31-2010
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#6
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*Resting In Peace*
Join Date: Aug 2009
Location: Heaven
Drives: 94 Plymouth Acclaim/2008 EvoX
Posts: 2,430
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Re: Am I burning lean or REALLY lean?
Quote:
Originally Posted by Matt D.
Sounds like it's rich? Please tell me how you can hear such a thing.
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I guess if it were possible to tune using plugs then we wouldn't need afr gauges.
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01-31-2010
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#7
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Join Date: Sep 2006
Location: new brighton
Drives: 04 evo
Posts: 1,212
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Re: Am I burning lean or REALLY lean?
I remember I could hear a little misfire and it smelled rich. Slap in your cams and have shane tune it
__________________
03 as evo-sold
04 bby ssl-sold
05 ww mr-sold
03 tb evo- current
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01-31-2010
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#8
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Shit Rocket Pilot
Join Date: Oct 2003
Location: Shoreview, MN
Drives: 2003 Evolution VIII
Posts: 7,752
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Re: Am I burning lean or REALLY lean?
Quote:
Originally Posted by mlomker
I guess if it were possible to tune using plugs then we wouldn't need afr gauges.
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No, but plugs are a good indication of engine health and overall performance.
__________________
"If everything seems under control, you're just not going fast enough." -Mario Andretti
03 Mitsubishi Lancer Evolution VIII
Quote:
Originally Posted by Tachyon
Every minute you spend in your Evo, not in boost, is a minute of your life you'll never get back.
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01-31-2010
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#9
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Join Date: Nov 2005
Location: Cottage Grove
Drives: Silver '02 IS300, Blue '06 Suzuki SV1000
Posts: 5,293
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Re: Am I burning lean or REALLY lean?
Those plugs look just fine to me.
__________________
'02 Lexus IS300
'06 Suzuki SV1000: Back on the road and ripping hard as ever!
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01-31-2010
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#10
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Kevin
Join Date: Jan 2004
Location: Shoreview
Posts: 3,356
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Re: Am I burning lean or REALLY lean?
Probably needs a tune! They look a little sooty to me, I bet its too rich!
Invest in a wideband.
__________________
Misses the Mitsu Community
Currently on Corvette #4
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01-31-2010
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#11
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wants to be sideways...
Join Date: Dec 2006
Location: Winona Minnesota
Drives: Loud cars
Posts: 2,764
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Re: Am I burning lean or REALLY lean?
What are you gapping your plugs to? Are you on a stock setup/injectors or whats the story?
__________________
Quote:
Originally Posted by Matt D.
Leave the straight line highway dick wagging to the ricers and people who think they are good drivers.
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Quote:
Originally Posted by 93GSX5SD
I'll second that. Its your car your choice. Enjoy your dsm experience.
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02-01-2010
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#12
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Join Date: Feb 2008
Location: Hutch
Drives: Evo VIII and 96' Buick Park Ave
Posts: 2,595
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Re: Am I burning lean or REALLY lean?
I'm wondering about the gap too.
Otherwise tune. Do you have an intake on it?
Edit: Boost leak test done.. ever?
Last edited by 311evo; 02-01-2010 at 03:56 AM..
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02-01-2010
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#13
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The Russian Stub
Join Date: Oct 2009
Location: Cedar, MN
Drives: 2001 Celica, 2005 Evo
Posts: 177
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Re: Am I burning lean or REALLY lean?
Quote:
Originally Posted by Matt D.
Sounds like it's rich? Please tell me how you can hear such a thing.
Are your plugs gapped correctly?
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Oops, sorry. It should have "smelled" rich.
My gap is .025 on BPR7ES.
Quote:
Originally Posted by mike55112
I remember I could hear a little misfire and it smelled rich. Slap in your cams and have shane tune it
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Haha, "slap" them in... I'm not mechaniclly inclined so nothing is "slapping" it in... Plugs is the easiest thing for me to do but that still takes me a while lol
Quote:
Originally Posted by 123abc
What are you gapping your plugs to? Are you on a stock setup/injectors or whats the story?
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My gap is .025 on BPR7ES.
3" tbe with testpipe
obx intake tube with k&n typhoon carbon airfilter and heatshield
ebay licp
turboxs h34 bov
mbc at 23psi
walbro 255
dynoflash ecu reflash
Quote:
Originally Posted by 311evo
I'm wondering about the gap too.
Otherwise tune. Do you have an intake on it?
Edit: Boost leak test done.. ever?
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No boost test ever done. Maybe I should try one? Maybe I should try compression test while I'm at it too.
Last edited by 2zzgtte; 02-01-2010 at 08:20 AM..
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02-01-2010
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#14
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Shit Rocket Pilot
Join Date: Oct 2003
Location: Shoreview, MN
Drives: 2003 Evolution VIII
Posts: 7,752
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Re: Am I burning lean or REALLY lean?
If you are that concerned about your car when the plugs look fine then you really should do a boost leak test and have Shane look at the tune. You aren't going to get a magical answer by making forum posts on the internet.
__________________
"If everything seems under control, you're just not going fast enough." -Mario Andretti
03 Mitsubishi Lancer Evolution VIII
Quote:
Originally Posted by Tachyon
Every minute you spend in your Evo, not in boost, is a minute of your life you'll never get back.
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02-01-2010
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#15
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Join Date: Nov 2007
Location: lino lakes
Drives: 98 GSX, 04 is300
Posts: 1,856
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Re: Am I burning lean or REALLY lean?
He's just trying to build his post numbers. Give him some slack
Quote:
Originally Posted by Matt D.
If you are that concerned about your car when the plugs look fine then you really should do a boost leak test and have Shane look at the tune. You aren't going to get a magical answer by making forum posts on the internet.
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__________________
98 GSX (built)
03 BBY EVO dd
GSX 463awhp 363awtq on DB!
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02-01-2010
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#16
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The Russian Stub
Join Date: Oct 2009
Location: Cedar, MN
Drives: 2001 Celica, 2005 Evo
Posts: 177
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Re: Am I burning lean or REALLY lean?
Lol, Sorry guys. I thought they looked lean to me. Just thought I'd ask. I could care less about post numbers
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02-01-2010
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#17
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Join Date: Nov 2007
Location: lino lakes
Drives: 98 GSX, 04 is300
Posts: 1,856
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Re: Am I burning lean or REALLY lean?
Quote:
Originally Posted by 2zzgtte
Lol, Sorry guys. I thought they looked lean to me. Just thought I'd ask. I could care less about post numbers
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Lol, it was a joke.. I was giving some shit.. just bored at work like matt d I guess.
__________________
98 GSX (built)
03 BBY EVO dd
GSX 463awhp 363awtq on DB!
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02-01-2010
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#18
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The Russian Stub
Join Date: Oct 2009
Location: Cedar, MN
Drives: 2001 Celica, 2005 Evo
Posts: 177
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Re: Am I burning lean or REALLY lean?
I am in the same boat as you guys... Trying to get my Google Talk to go through my Proxy and it just wont work. Since we have came to a conclusion about my spark plugs, maybe someone can give me advice on that?? lol
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02-01-2010
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#19
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formerly ecoli
Join Date: Oct 2003
Location: On the dyno
Posts: 4,892
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Re: Am I burning lean or REALLY lean?
Your plugs don't look fouled out or anything, and they aren't covered in oil residue either.
Copper plugs don't last forever either though. You might have a weak coil(stock Evo coils suck) or bad plug wire, if it will only fire smoothly with perfectly new plugs. Or your ignition timing in the tune could be too far off.
A lot of people confuse the smell of a car idling/running lean with that of a rich car. Lean smells very noxious. Really rich and gas will be coming out the exhaust pipe, but it will smell like raw gas and your plugs will usually be dripping wet.
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02-01-2010
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#20
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flips McGee
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Re: Am I burning lean or REALLY lean?
Good call shane, stock coil boots and plugwires go bad quicker than most people think; if the car is missing and the plugs are not gunked up, def replace both (or do the spoolinup COP woot!). I have a good set of stock coils w/ good boots/wires if you want to borrow them as a test.
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