Black Exhaust?
Thread Starter
Driver
Joined: Mar 2010
Posts: 122
Likes: 0
From: WA
On average I would say I go threw about a tank of gas a week or so, The car has never sat more than about 4 days without being drove. I use Shell, Union 76, and occasionally Chevron, always a minimum of 92 octane.
Thread Starter
Driver
Joined: Mar 2010
Posts: 122
Likes: 0
From: WA
Took a trip to the dealer yesterday, They checked the fuel system and told me everything was within normal perimeters, I told them that can't be!! how is that a new motor pumps out so much black carbon in such a short period of time (a few days)? He says that most likely because I have after market exhaust....??? I looked at him as I scratched my head thinking this guy is a dumb A** and asked...would you say the same thing if the exhaust where F-sport? he actually said NO!! at this point I was ready to club the guy like a baby seal.
Looks like I will be playing dealer games for a while before they address the carbon problem.
Looks like I will be playing dealer games for a while before they address the carbon problem.
^Let the games begin....
Too bad, Lexus is still in denial mode that their DI engines do have carbonization issue
...let's see how proactive they get on this developing issue on ALL their DI engines....clock is ticking Lexus
Mike,
I suggest that you try going to a different dealer for diagnosis later, clearly this Lexus "tech" that is blaming the exhaust as the potential cause for carbonization is dreaming...AND F-Sport exhaust won't cause the buidup 
To say that Air, Fuel ratio is normal, AND is still causing significant tailpipe carbon--there is definitely something not right.
Too bad, Lexus is still in denial mode that their DI engines do have carbonization issue
...let's see how proactive they get on this developing issue on ALL their DI engines....clock is ticking LexusMike,
I suggest that you try going to a different dealer for diagnosis later, clearly this Lexus "tech" that is blaming the exhaust as the potential cause for carbonization is dreaming
...AND F-Sport exhaust won't cause the buidup To say that Air, Fuel ratio is normal, AND is still causing significant tailpipe carbon--there is definitely something not right.
Last edited by spine911; Jul 11, 2010 at 04:08 PM.
Lexus Champion
Joined: Jul 2009
Posts: 3,277
Likes: 3
From: USA
Why am I get the impression that denial is the Lexus modus operandi?
They deny the carbon build-up.
They denied the spring issue for a long time.
They denied that I had a knocking noise on my F-Sport sways and customer service won't even call me back regarding the complaint.
I went in to ask them to put a new pedal in our ES350 because I didn't like the hack job they did on the old pedal (which BTW I asked them to leave alone) and they tried to tell me there was nothing wrong with it.
I've got to say - Lexus is reminding me a lot of GM in the 80s. The company really has a major problem with employees and dealers who are conditioned to deny and tell the customer that the customer is wrong.
Some say they will bounce from their problems and be better than ever. I think that something is rotten in the house of Lexus, and without some wholesale cleanup of frontline employees and management, nothing will change. This requires cultural change and that doesn't come about quickly.
They deny the carbon build-up.
They denied the spring issue for a long time.
They denied that I had a knocking noise on my F-Sport sways and customer service won't even call me back regarding the complaint.
I went in to ask them to put a new pedal in our ES350 because I didn't like the hack job they did on the old pedal (which BTW I asked them to leave alone) and they tried to tell me there was nothing wrong with it.
I've got to say - Lexus is reminding me a lot of GM in the 80s. The company really has a major problem with employees and dealers who are conditioned to deny and tell the customer that the customer is wrong.
Some say they will bounce from their problems and be better than ever. I think that something is rotten in the house of Lexus, and without some wholesale cleanup of frontline employees and management, nothing will change. This requires cultural change and that doesn't come about quickly.
Thread Starter
Driver
Joined: Mar 2010
Posts: 122
Likes: 0
From: WA
Why am I get the impression that denial is the Lexus modus operandi?
They deny the carbon build-up.
They denied the spring issue for a long time.
They denied that I had a knocking noise on my F-Sport sways and customer service won't even call me back regarding the complaint.
I went in to ask them to put a new pedal in our ES350 because I didn't like the hack job they did on the old pedal (which BTW I asked them to leave alone) and they tried to tell me there was nothing wrong with it.
I've got to say - Lexus is reminding me a lot of GM in the 80s. The company really has a major problem with employees and dealers who are conditioned to deny and tell the customer that the customer is wrong.
Some say they will bounce from their problems and be better than ever. I think that something is rotten in the house of Lexus, and without some wholesale cleanup of frontline employees and management, nothing will change. This requires cultural change and that doesn't come about quickly.
They deny the carbon build-up.
They denied the spring issue for a long time.
They denied that I had a knocking noise on my F-Sport sways and customer service won't even call me back regarding the complaint.
I went in to ask them to put a new pedal in our ES350 because I didn't like the hack job they did on the old pedal (which BTW I asked them to leave alone) and they tried to tell me there was nothing wrong with it.
I've got to say - Lexus is reminding me a lot of GM in the 80s. The company really has a major problem with employees and dealers who are conditioned to deny and tell the customer that the customer is wrong.
Some say they will bounce from their problems and be better than ever. I think that something is rotten in the house of Lexus, and without some wholesale cleanup of frontline employees and management, nothing will change. This requires cultural change and that doesn't come about quickly.
Very disappointing way to handle a loyal customer. I will get MID-EVEL before I let this go!!
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executive matchup
Joined: Apr 2008
Posts: 5,771
Likes: 13
From: BC
question i want to know is: what is the right amount of soot (or carbon) that should be found on the inside exhaust tips? and that should be after how many days/weeks/months of driving?
mike450h, i took a quick peek at my tips this weekend, and i'm going to have to agree with you that my inside tips look just as black as yours. however this is after several months of driving; i really haven't paid a lot of attention to my tips the last couple of months due to being really busy, so it's possible it got black that way after a few days or perhaps after a couple of months (i dunno).
mike450h, i took a quick peek at my tips this weekend, and i'm going to have to agree with you that my inside tips look just as black as yours. however this is after several months of driving; i really haven't paid a lot of attention to my tips the last couple of months due to being really busy, so it's possible it got black that way after a few days or perhaps after a couple of months (i dunno).
With Direct Fuel Injection cars ( as opposed to earlier Electronic Fuel Injection models ), you have to be careful about the type of fuel you are using!
Check with your local fuel suppliers about exactly what type of fuel you are using. Find out if the fuel you have been using has sulfur in it. If it does, BINGO, there's your problem.
Find a gas station that supplies premium 93 Octane, sulfur free unleaded fuel.
Check with your local fuel suppliers about exactly what type of fuel you are using. Find out if the fuel you have been using has sulfur in it. If it does, BINGO, there's your problem.
Find a gas station that supplies premium 93 Octane, sulfur free unleaded fuel.
Thread Starter
Driver
Joined: Mar 2010
Posts: 122
Likes: 0
From: WA
question i want to know is: what is the right amount of soot (or carbon) that should be found on the inside exhaust tips? and that should be after how many days/weeks/months of driving?
mike450h, i took a quick peek at my tips this weekend, and i'm going to have to agree with you that my inside tips look just as black as yours. however this is after several months of driving; i really haven't paid a lot of attention to my tips the last couple of months due to being really busy, so it's possible it got black that way after a few days or perhaps after a couple of months (i dunno).
mike450h, i took a quick peek at my tips this weekend, and i'm going to have to agree with you that my inside tips look just as black as yours. however this is after several months of driving; i really haven't paid a lot of attention to my tips the last couple of months due to being really busy, so it's possible it got black that way after a few days or perhaps after a couple of months (i dunno).
For my car it will be completely Back and I mean the entire exhaust tip, and its thick black carbon...within about a 4 days if I drive the car every day. I am not sure what would be considered normal if in fact this is something that every GS is having an issue with. I am under the impression that this is only happening with V6 motors, and not all are acting this way? What I do know is it cannot be normal for a new motor to do this.
Thread Starter
Driver
Joined: Mar 2010
Posts: 122
Likes: 0
From: WA
With Direct Fuel Injection cars ( as opposed to earlier Electronic Fuel Injection models ), you have to be careful about the type of fuel you are using!
Check with your local fuel suppliers about exactly what type of fuel you are using. Find out if the fuel you have been using has sulfur in it. If it does, BINGO, there's your problem.
Find a gas station that supplies premium 93 Octane, sulfur free unleaded fuel.
Check with your local fuel suppliers about exactly what type of fuel you are using. Find out if the fuel you have been using has sulfur in it. If it does, BINGO, there's your problem.
Find a gas station that supplies premium 93 Octane, sulfur free unleaded fuel.
i am not trying to say if this is normal or not, but here's a list of cars i have owned in recent years
1998 gs400
2005 sc430
2007 ls460l
2008 gs350
2008 m3
at least from what i can see, all these cars put out exhaust similarly. all the exhaust tips get dark after maybe 1 week of driving. this is regardless of how i drive the car or what gas i use (always premium of course).
1998 gs400
2005 sc430
2007 ls460l
2008 gs350
2008 m3
at least from what i can see, all these cars put out exhaust similarly. all the exhaust tips get dark after maybe 1 week of driving. this is regardless of how i drive the car or what gas i use (always premium of course).
Last edited by rominl; Jul 12, 2010 at 02:11 PM.