Question about Chevrolet TrailBlazer

1 Answer

1995 f-150, 5.0, black soot in tailpipe

Declining power on 170,000 mile, ford truck 5.0 engine. increased black carbon in tailpipe

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert who has achieved Level 3.

  • Master
  • 426 Answers

That carbon in pipe is more likely to be an engine supplying too much or inefficiently burning the fuel.Do a compression test to determine engine health should be roughly 140psi +for the engine ageYour ignition(plugs/leads etc)may need to be looked at also.While doing compression test you may want to change plugs to non resistor NGK V groove they work extremely well at burning off most extra(within limits)oil deposits caused by wear and tear.May want to try a can/bottle injector cleaner in fuel tank to try and clear up the varnish and deposits left over by time.

Posted on Nov 01, 2008


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Spark plugs went bad after 4000 miles

The black soot is carbon from the gas usually caused by too much fuel being burnt. Incorrect fuel to air ratio. Take vehicle to service center and have set.

Jan 16, 2017 | Cars & Trucks

2 Answers

Black smoke comes from exaust when I start. Could it overfuel and how can I fix it if its a new carb on my 88 2e 12valve

assuning there is nothing major wrong, get some forte injector and use it as recommended. I once had a renault laguna diesel fail an MOT test, a roadworthiness test that is, on was absolutely chucking out black smoke but the engine ran well. I put 2 bottles of injector cleaner in the half full tank and went out for an eighty mile drive revving the engine in the lower gears. I returned to the testing station an hour and a half later and the engine was running perfectly.
Alternatively, assuming the engine runs well but is just a little smokey, have it terracleaned, this will remove most of the carbon deposits from the engine/exhaust and should increase the life of your engine simultaneously improving fuel economy

Oct 26, 2015 | Cars & Trucks

3 Answers

Ford Freestyle - 2006 - Limited. After a 130 mile highway speeds 70 to 85 MPH the vehicle emitted OIL fumes enough to fog the back of the vehicle with a thin film of carbon black and oil file.

It could be a number of things.
Bad head gasket.
Worn rings.
Valve seals or guides or both.
Do a compression check of the cylinders that should help pinpoint the problem.
Hope this helps.

May 03, 2015 | 2006 Ford Freestyle Limited

1 Answer

Black soot on rear bumper

carbon from exhaust must lengthen or redirect tailpipe

Mar 15, 2012 | Cars & Trucks

1 Answer

Black smoke from exhaust, rough idle, black soot on plugs

signs of a bad fuel pressure regulator-- the vehicle will run rough, the engine will not start ( usually in the mornings,) many times engine starts but stalls shortly after starting. a bad regulator can result in fouled plugs. replacement is only cure. 1- black soot on plugs-2-black smoke from tailpipe-3- running rough-4- stalling, good-day! repost if need be.

Aug 10, 2011 | 1994 Suzuki Sidekick

1 Answer

Black soot comes from tailpipe when hard acceleration.

normal carbon build up run some stp gas treatment

Oct 14, 2010 | 1996 Chevrolet Impala SS

1 Answer

Lacking power and making rattle noise

sounds like your cat converter has broken up and is now plugging you exaust.turn off engine crawl under truck and bang on cat converter with piece of wood if it rattles cat is bad. but dont just replace it because something caused it to go bad,number one reason of broken cat is a hard missfire so if runs rough fix that first.number two reason is to rich fuel mixture is it burns the eyes smells bad or has black soot or smoke coming out the tailpipe fix that first also.

Mar 21, 2010 | 2000 Ford F350 Super Duty Super Cab

1 Answer

2004 Excursion 6.0 diesel blows intermitent white smoke

I don't drive a Ford but I drive an International and white smoke on start up means the engine is too cold to properly burn the fuel. Your black oil or soot is unburnt fuel. You should look at your engine's preheat system for a malfunction.

Jul 13, 2009 | 2006 Ford F-250 Super Duty

1 Answer

Egr malfunctioning

this engine is plagued with egr issues! the 4.3 liter engine is suspect to carbon build upo inside the intake, the chunks of carbon break off and plug up egr so the pintle can not close fully...the good news is the valve is not bad.... remove the valve, carefully clean the pintle free of debris. start the vehicle with egr valve out..make sure wiring for valve is out of the will be very loud..rev it up and down a few times to help purge carbon chunks out of the intake. reinstall valve..this should help you..

ps your 4 thumbs up is appreciated!

Jun 06, 2009 | 1994 Oldsmobile Bravada

2 Answers

Black soot in tailpipe:poor gas milage

I would go to another dealer, there is definately something wrong, and a decent technician can scan the system and should come up with your problem. I cannot believe any dealer would say this is normal.

Aug 06, 2008 | Chevrolet TrailBlazer Cars & Trucks

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

118 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts


Level 3 Expert

77499 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22306 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides