FordExcursions.com Forums
Kirk Anderson
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• San Anderson, TX, USA |
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• Registered on 11/4/2003 |
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• 15 posts |
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 Posted:6/9/2004 21:35 |
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My '03 6.0 has developed a black soot stain on the rear quarter panel. After washing it off, it returns after about 300 miles. I have also lost 1.5-2 MPG. This seemed to happen over night. It has been to the dealer 3 times now with the same explanation each time..."No problem found. The test equipment says it's fine." It does seem to run great, but I haven't seen any other 6.0s on the street with soot stains. It has had all the updates and I have done the service by the book. Anyone have a similar problem or suggestions? |
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bryant loke
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• bakersfield, CA, USA |
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• Registered on 1/4/2004 |
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• 62 posts |
• 1 Vehicle
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Posted:6/10/2004 00:14 |
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hello all. Hi there kirk.
If you didnt know, diesels tend to put out a bit more "smoke, we will call exhaust, than a gas motor. Running rich is a common trait of a diesel. I have a 7.3, and I get the resedue every tank of fuel. Just wash it off, and keep on truckin. ANother thing, you may gotten some bad fuel, therefore resulting in worse fuel mielage. Maybe your driving habits have changed a bit, maybe your taking shorter trip in the truck than usual; grocery store and what not. Stop and go driving is hard on the fuel economy of any vehicle. either way though, it is a 6.0, and it probably still gets excellent fuel mileage. You must admit, if you were worried about fuel economy, you wouldnt have bought the mothership of all SUV's. But it is still a drop...i know.
Kirk...perfectly normal, Im sure theres nothing wrong with your PSD. But keep and eye on the truck, and watch the performance and all that jazz. Have fun, and let us know what happens....
DX |
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Kirk Anderson
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• San Anderson, TX, USA |
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• Registered on 11/4/2003 |
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• 15 posts |
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Posted:6/12/2004 21:41 |
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| Quote: | hello all. Hi there kirk.
If you didnt know, diesels tend to put out a bit more "smoke, we will call exhaust, than a gas motor. Running rich is a common trait of a diesel. I have a 7.3, and I get the resedue every tank of fuel. Just wash it off, and keep on truckin. ANother thing, you may gotten some bad fuel, therefore resulting in worse fuel mielage. Maybe your driving habits have changed a bit, maybe your taking shorter trip in the truck than usual; grocery store and what not. Stop and go driving is hard on the fuel economy of any vehicle. either way though, it is a 6.0, and it probably still gets excellent fuel mileage. You must admit, if you were worried about fuel economy, you wouldnt have bought the mothership of all SUV's. But it is still a drop...i know.
Kirk...perfectly normal, Im sure theres nothing wrong with your PSD. But keep and eye on the truck, and watch the performance and all that jazz. Have fun, and let us know what happens....
Thanks for the reply. I'd be OK with that explanation if the vehicle had always been that way...but it has not. The first 23-25K miles I averaged 17.5 MPG, and I only noticed minimal black smoke on heavy acceleration. The truck now has 33K miles. My current MPG average is 15.8. The last highway trip I took I only got 16.1 MPG. I do drive a lot (3-4K per month) so I notice the fuel milage. The truck never had a smoke stain during the first 25K miles. I turned the rear view mirror down so I could see the tailpipe while I'm driving. I have notice a puff of smoke every time I accelerate. Even very slight throttle pressure causes a puff. Surely this is not correct. I have been watching other 6.0 on the road, and none seem to have similar smoke problems. Is there anything I should look for? DX |
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Dave Sullivan
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• Kitchener, XX, Canada |
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• Registered on 2/27/2003 |
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• 199 posts |
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Posted:6/12/2004 23:54 |
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The only time I can get my 7.3 to smoke is to tromp it real hard and then only for a short time.
Me thinks you may have a sensor problem... seems to me that there is one that monitors the exaust temp which is in turn used to keep the smoke down... and there is something else too but I'm too tired to look it up just now. its 1am so I gotta hit the sack.
It sounds like you have a ligitiment problem and you might want to change dealers or something and get another opinion.
You may have to pay to have a proper diagnosis done but if its the motor, its likely still on waranty. I am fairly sure that this is the route you will have to follow in order to feret out the problem.
Unless of course, the hood opens up and the ex spits out the bad part at you and closes up again... if only it was that easy.
Dave S.  |
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bryant loke
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• bakersfield, CA, USA |
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• Registered on 1/4/2004 |
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• 62 posts |
• 1 Vehicle
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Posted:6/12/2004 23:57 |
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lol. I want to apologize kirk. i sounded like a smartass....my apologies. |
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E. Long
 
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• Subscriber since 1/1/2001 |
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• Atlanta, GA, USA |
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• Registered on 1/23/2001 |
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• 2,228 posts |
• 1 Vehicle
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Posted:6/14/2004 22:23 |
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Black smoke is directly related to too much fuel. What's the condition of your air filter like? Anything blocking the air intake that could be causing your X to work a little harder and thus produce the excess black smoke?
Is it a stock 6.0L or is it chipped? My X rarely smokes in stock form. With a chip, it would smoke like an SOB under wide open throttle. If she's not warmed up and I hammer down on the throttle, she will belch out a thick cloud of black smoke...but normal driving it is not noticable and I don't hav enay buildup on the quarter panel.
-Eric
'67 Galaxie 500 - 390 FE, .030" over, FE to AOD adapter, disc brake conversion. The Daily Driver.
'00 Excursion - 7.3L PSD, LANDYOT Gen-II Radius Rods, Factory Tech Valve Body, 200K+ miles and going |
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Kirk Anderson
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• San Anderson, TX, USA |
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• Registered on 11/4/2003 |
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• 15 posts |
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Posted:6/15/2004 09:02 |
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| Quote: | Black smoke is directly related to too much fuel. What's the condition of your air filter like? Anything blocking the air intake that could be causing your X to work a little harder and thus produce the excess black smoke?
Is it a stock 6.0L or is it chipped? My X rarely smokes in stock form. With a chip, it would smoke like an SOB under wide open throttle. If she's not warmed up and I hammer down on the throttle, she will belch out a thick cloud of black smoke...but normal driving it is not noticable and I don't hav enay buildup on the quarter panel. |
Eric-
It is stock except for an AFE air filter (I keep it clean). It doesen't smoke during warm-up. The throttle is crisp through the warm-up mode and for the first 30-50 miles. After that, it seems to get a little doggy. It has a little more turbo lag and it needs a little more throttle pressure to achieve the same power. I know it is to rich. It feels just like a gas engine that is too rich. I'm starting to think it might be the EGT sensor as suggested earlier. It seems the longer it runs, the worse it gets. I'm going back to the dealer today to see if they can test the EGT sensor. Thanks for the help. |
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E. Long
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• Subscriber since 1/1/2001 |
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• Atlanta, GA, USA |
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• Registered on 1/23/2001 |
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• 2,228 posts |
• 1 Vehicle
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Posted:6/15/2004 13:20 |
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| Quote: | | Quote: | Black smoke is directly related to too much fuel. What's the condition of your air filter like? Anything blocking the air intake that could be causing your X to work a little harder and thus produce the excess black smoke?
Is it a stock 6.0L or is it chipped? My X rarely smokes in stock form. With a chip, it would smoke like an SOB under wide open throttle. If she's not warmed up and I hammer down on the throttle, she will belch out a thick cloud of black smoke...but normal driving it is not noticable and I don't hav enay buildup on the quarter panel. |
Eric-
It is stock except for an AFE air filter (I keep it clean). It doesen't smoke during warm-up. The throttle is crisp through the warm-up mode and for the first 30-50 miles. After that, it seems to get a little doggy. It has a little more turbo lag and it needs a little more throttle pressure to achieve the same power. I know it is to rich. It feels just like a gas engine that is too rich. I'm starting to think it might be the EGT sensor as suggested earlier. It seems the longer it runs, the worse it gets. I'm going back to the dealer today to see if they can test the EGT sensor. Thanks for the help. |
Please let us know what you find. Obviously not a common issue if we can't help you out...thus the dealer is not used to seeing it, but good to know for future purposes.
-Eric
'67 Galaxie 500 - 390 FE, .030" over, FE to AOD adapter, disc brake conversion. The Daily Driver.
'00 Excursion - 7.3L PSD, LANDYOT Gen-II Radius Rods, Factory Tech Valve Body, 200K+ miles and going |
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Dave Sullivan
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• Kitchener, XX, Canada |
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• Registered on 2/27/2003 |
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• 199 posts |
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Posted:6/21/2004 17:53 |
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Another sensor to look at is The MAP or Analog Manifold Absolute Pressure Sensor.
It controles smoke on acceleration by limiting the fuel till a specified boost pressure is attained.
Poor fuel economy can also be attributed to boost pressure.
Something else to look for is holes in the Map sensor hose and or a restriction in the hose.
Other checks include looking for a biased ICP sensor, Fuel pump pressure, Fuel regulator, Aerated oil, biased EBP sensor,
biased EOT sensor, Barometric pressure sensor, (BARO) , IAT sensor, and EOT sensor.
Further checks include intake air heater, and fuel injectors.
Needless to say, a full diagonsis is likely going to be needed if its not painfully obvious.
Dave S.
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Kirk Anderson
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• San Anderson, TX, USA |
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• Registered on 11/4/2003 |
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• 15 posts |
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Posted:6/22/2004 06:28 |
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I picked it up Saturday AM. The drivability is much better and the milage appears to be better. I'll calculate the MPG exactly on the next full tank. The smoke is still there.
The service manager told me that they dumped all of the update codes on the computer and then reloaded each code, one at a time. He explained that sometimes the computer will not accept an update, If update code #3 is missing, then #4,5 6 and 7 just make it worse.
It feels much stronger and the throttle responce is crisp, but the smoke is pissin' me off. I think I'll try another dealer before the warranty runs out.
Kirk |
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