For about a week or so, maybe longer not sure, whenever i start up the truck I get some black smoke out the exhaust. It takes a couple of revs before it stops. I am not sure if it continues while I am driving, don't think so. I haven't done anything different, I use 93 Oct gas and changed my oil at 3K, now at 5,500K. I also noticed that tons of carbon build up against the tip of the exhaust. What's up with that, I don't notice that in other cars. I am taking it in the dealer tomorrow to get my oil change and ask them about it. Any idea???
I know black is for Rich mixture, not exactly sure what that is.
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2007 Toyota FJ 4x4 Sun Fusion
20"BBS on Nitto Dune Grapplers 285x50x20
TRD Cold Air Intake System
8000 HID Xenon Kit with Projector Beams
PIAA Extreme White Fog Lights on Brush Guard
Magnaflow Catback System
AutoPage RF-420 LCD with Remote Start Security
Custom Black and Yellow Leather Seats
LEDs all around
I recently noticed the inside of my tail pipe is black and almost oily. I run 93 octane and drive mostly highway 60 miles daily, I am at 17,000 miles with oil changes every 3,000. My other cars always had a dry light brown powder except when my Suburban had over 200,000 it was oily like this before I rebuilt the engine (valve guides were worn). I am using no additional oil between changes. Maybe we should start a "What color is your tail pipe" poll
I have noticed that on mine to..When I drove to Colorado at altitude I noticed it was cleaner and got a lot better milage. I think it runs to rich at 2000ft and lower...........
I am not sure, but its black and I clean it often.
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2007 Toyota FJ 4x4 Sun Fusion
20"BBS on Nitto Dune Grapplers 285x50x20
TRD Cold Air Intake System
8000 HID Xenon Kit with Projector Beams
PIAA Extreme White Fog Lights on Brush Guard
Magnaflow Catback System
AutoPage RF-420 LCD with Remote Start Security
Custom Black and Yellow Leather Seats
LEDs all around
I have noticed that on mine to..When I drove to Colorado at altitude I noticed it was cleaner and got a lot better milage. I think it runs to rich at 2000ft and lower...........
I don't think it has anything to do with altitude, mine is black as well, but no smoke as far as I can tell.
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"If you insist on getting credit for the work you do, you'll never get far in life. Don't confuse yourself with the idea of getting credit"
- Colonel John Richard Boyd, USAF, retired.
I had mine at the dealership back in January (20,000 miles) for this, black smoke on start up and lots of carbon in tail pipe. They said they checked every thing out and that it is running fine.
__________________ Sun Fusion AT, 4X4 , CQ ,GY,UR,C7,C8,V5,WB,Z2. Window vent shades, New Tundra shift Knob,Custom 4x4 shift knob, K&N Air filter,Trail Gear rock rails, OEM brush Guard,Hella Black Magic Lights, Aero flow light covers and stealth driving lights,Springtail MPAC, Black Tundra handles, Blacked-out-Bezel, Mirrors and dash.
Location: Parker County, TX and Santa Fe County, NM
Posts: 2,205
Re: Black smoke and carbon build-up
It's just the cold start circuit in the fuel injection. Like most modern gasoline engines the 1GR-FE runs pretty lean for emissions and fuel economy. Lean enough that it wouldn't start easy or run for sh!t until it is fully warm, so it meters extra gas when cold. Nothing to worry about. When you change your plugs at 30,000 miles you will not see any carbon at all.
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TLCA # 16550
All men dream: but not equally. Those who dream by night in the dusty recesses of their minds wake in the day to find that it was vanity: but the dreamers of the day are dangerous men, for they may act their dreams with open eyes, to make it possible - T. E. Lawrence
Might be a bit of unburned fuel/carbon deposits sitting in the cats. Cats are not fully effective until they reach a certain operating temp. I get a little puff now and then but at operating temp everything is fine.
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Sun Fusion AT, 4X4 , CQ ,GY,UR,C7,C8,V5,WB,Z2. Window vent shades, New Tundra shift Knob,Custom 4x4 shift knob, K&N Air filter,Trail Gear rock rails, OEM brush Guard,Hella Black Magic Lights, Aero flow light covers and stealth driving lights,Springtail MPAC, Black Tundra handles, Blacked-out-Bezel, Mirrors and dash.
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