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The black smoke is usually unburned fuel from the vehicle running too rich. If the check engine light is on you can pull the codes which will give you guidance. O2 sensors are common as well as a variety of ignition & other sensors. Test components before replacing, you can spend a lot of money guessing and throwing parts at the vehicle.
Wiki User
∙ 16y ago
Wiki User
∙ 15y agoRough engines with black smoke ALWAYS means that you're getting too much fuel to the cylinders. It's almost certainly a sticking injector. ** The van is half carb, half computer - computer controls only the spark...gas is the carb, no injectors ********* Look a little closer. It's probably throttle body injection. That can look a lot like a carburetor and confuses a lot of people. If it's throttle body, see if the injector is dripping after you turn off the key. If it really IS a carburetor, remove it and rebuild, using a new needle and seat assembly, and make certain that the float is not damaged. You can purchase a carburetor rebuild kit from most auto parts retailers. The kit gives detailed, step by step instructions. Alternatively, you could just purchase a rebuilt carb.
Wiki User
∙ 16y agoAttempting to burn raw fuel Not running on all cylinders
Check spark plugs
plug wires
Do a compression test to see if problem is internal (bad valve, piston)
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Why is your diesel car hard to start and when it does it blows out a big cloud of black smoke but then runs normally?
Possibly bad glow plugs.
1991 Nissan truck v6 blowing black smoke running rough when you give it more than quarter throtle?
It's running too rich.
What could be wrong with 1992 supra It starts good but after running for may be a minute it starts chugging at 4000 rpm and blows black smoke also wont idle have changed all spark plugs?
Blowing black smoke typically means that the vehicle is either getting too much fuel or not enough air. Check the air cleaner and make sure it's clean, and if that's not it, check the injectors
1990 Chevy 1500 would start fine run OKfor ten seconds then die replaced fuel pump now wont start unless accelerator is floored but runs bad blows black smoke and misses?
change fuel filter
What is wrong with your Ford F-350 when it is blowing black smoke and it wont start?
Blowing black smoke is indicative of an oil leak in the engine.
Why does truck skip on one side and blows black smoke?
Why does my truck skip and pop on one side and blows black smoke??
Black smoke running rough?
300zx twin turbo lots of black smoke and running rough
95 f-250 DIESLE idles rough and has no power IDLE IS rough BLOWS BLUE SMOKE?
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2000 cavalier blows black smoke could it be from rich fuel or oxygen sensor?
why could there be black smoke coming out my 2000 calalier
Citreon dispatch blows black smoke?
If it is turbo diesel, then the turbo is blowen
1993 Camry black smoke from exhaust pipe and idles rough?
Black smoke is caused by excessive fuel in the engine
Why does a diesel engine blow out black smoke?
The black smoke that a diesel engine blows out is fuel that is unburned. The black smoke can be caused from over-fueling, poor fuel quality, or dirty or worn fuel injectors.
Why my 1994 Toyota pickup blows black smoke and has miss?
most likely timing is off or a bad valve
94 Suzuki sidekick 1.8l engine has a rough idel stalls when put in gear and blows out black smoke from exhaust that smells like gas?
Not all cylinders firing? Check spark plugs/ wires Do a compression test to determine which cylinder is not firing
Chevy 400 blows black smoke why?
it burns oil... ur rings might be bad or if its just when you first start than its ur o rings Black smoke indicates excessive fuel (flooding). Blue smoke indicates oil. White smoke indicates coolant.
Why is your diesel car hard to start and when it does it blows out a big cloud of black smoke but then runs normally?
Possibly bad glow plugs.
What kind of smoke of does the smoker blows off?
its called mainstream smoke
