Black exhaust smoke?

Question

I dont know if it happens while i am driving, but when i parked my car last night, i quickly floored it a couple times. when i did this, a bit of black smoke came out the tail pipe. I dont know why this would be...almost everything under the hood is new...plugs, wires, cap and rotor, oil, sensors, gaskets...i use fuel inj. cleaner every so often. The only thing left is the fuel pressure regulator, but i dont know how to test it. Does that seem like it could be the culprit? or does it sound like something else? thank you

Oh, its a 1989 thunderbird with a 3.8 V6 and 120,000 miles

Answer 1

thats just soot from the exhaust.if its running good,i wouldnt worry about it.just about every car you see today has a black tailpipe,look at some of them,when you get the chance,but if you havent already,you might try and change the 02 sensor.i have a 88 olds,3.8 and the fuel pump regulator is a sealed unit and all you can do is check for vacuum and hook up a fuel pump tester and check for pressure and voluum.

Answer 2

I don't recommend flooring your car unnecesarily.
Every turn of the engine shortens it's life a little.
Getting where you need to go with the fewest rpm (revolutions per minute) will make your car last longer.

That being said I know that some used car salesmen will rev an engine and watch for smoke as the engine slows down.
Here is a test you can do:
hold a white piece of paper by the exhaust to see if the smoke happens when the car is at idle.
Have someone else rev the engine and see how dirty the paper gets. If the blue smoke only happens as the engine is slowing down after it was reved up then I would think the problem is with the valve seals. I had an a 1.9 L Ford Escort where I just needed to push the seals back down into it's proper position and the smoking stopped. All I had to do was remove the valve cover and use screw drivers to carefully push the valve seals back into position.
If you have black smoke then the fuel mixture is probably too rich. There are many things that can make this happen. Replacing a bad MAP sensor fixed this problem for me once but it makes sense to start with the cheaper and easier things like changing the air filter.

Answer 3

Black Exhaust

Answer 4

This is a bad sign. It means you're engine is burning oil, which means oil is getting into a place it's not supposed to. It's more noticible after it sits because it's happening slowly and when it's running it burns up as fast as it gets into the cylinder. But after it sits there's more that has to burn off all at once and that's whats producing the smoke. There could be several causes but by doing a "compression check" most of the possible reasons would be found. If you think of the engine as two parts, upper and lower, the upper end has the cylinders and the lower end has the oil. Somehow the oil is getting into the cylinders and being burned along with the air/gas mixture. The most likely cause is bad piston rings or cylinder walls/sleeve. But whatever the cause, the fix is not cheap. Sorry for the bad news. Good luck.

Answer 5

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RE:
Black exhaust smoke?
I dont know if it happens while i am driving, but when i parked my car last night, i quickly floored it a couple times. when i did this, a bit of black smoke came out the tail pipe. I dont know why this would be...almost everything under the hood is new...plugs, wires, cap and rotor, oil, sensors,...

Answer 6

The black smoke denotes gas consumption... The more smoke, the harder you are pressing the gas pedal... Maybe, you would like to try changing the jets in the Injection... Or tuning the car in a way that the gas consumption is not so high... Usually this is called mixture... Check this first before doing anything to your fuel pressure regulator... if improve, well... If not... Maybe the pressure is higher than normal, causing that more fuel is injected into the cams... Also, try different spark plugs... sometimes the two electrodes or three electrodes spark plugs help with the fuel burn...

Answer 7

Bule smoke is oil, white smoke is coolant, and black smoke is fuel, Ford uses an idle air control valve to bleed air into the throttle plate housing and looks like a big needle and seat when it is removed. It will have a plug and be held on by 2 screws. this is how they set there idle and air/fuel mixture. I would take a look at this becouse you are running way to rich

Answer 8

Hey man, All cars and trucks will do that today if you floor board them like that. We don't use leaded gasoline any more and leaded gas kept the black sout down in the exhaust system. Try it on another car and see for you're self.Its normal. You are just blowing loose sout out of the system.

Answer 9

Black smoke isnt all that bad. It is unburned fuel. The car isnt running at its best but that could have to do with age. If it is an excessive amount I would have the tunning checked but if were a little I wouldnt worry about it. The amount of money chasing the culprit isnt worth it. Good Luck!!

Answer 10

Black smoke usually means too much gas got into the engine which makes sense since you floored it.