Black smoke leak power - Cars & Trucks

Black smoke means the vehicle is running really rich , do you know what that means ? lacks power when accelerating could be plugged catalytic converter . Fouled spark plugs . Leaking , fuel injectors , fuel pressure regulator leaking .Air filter clogged .Hooking up a scan tool an checking fuel trims , seeing if the computer is taking fuel away or adding .Seeing what the computer is seeing
Why black smoke coming from my car engine Troubleshooting 1 Must Watch

To much fuel being dumped. Check vacuum lines for leaks to start. Could be stuck injectors.

Is the smoke white or bluish/black? The white smoke could indicate leaking oil seals or even a coolant leak. The 3.8 is more common for the intake manifold and plenum gaskets to start leaking and causing white smoke. If the smoke is bluish/black,check the fuel pressure regulator to make sure it is not leaking and fuel being sucked into the intake via the vacuum line.

Smoke (blue or black) or steam (white)? White smoke is really steam that is caused by water leaking onto hot surface. Could be leaking from hose running to heater coil under dash, or something else. Check radiator water level to make sure water level is ok. Blue smoke is oil burning. This could be dangerous, caused by similar scenario of oil leaking on a hot surface (from a gasket leak, etc), or exhaust fumes. Black smoke means something is actually burning and could indicate fire. Black or blue some could fill vehicle cabin with toxic fumes, even if you don't smell anything bad.

What year, make and model car is this? Most likely, black smoke is
usually a carburator problem. If it's fuel injected, black smoke can be caused by 1) leaking or faulty fuel injecters, 2) faulty choke, 3)dirty air
filter or 4) faulty distributor cap and/or rotor. Hope this helps.

if your engine's smoke is black or gray or bluish, then there is an oil leak. caused either by faulty valve guides / valve seals or piston rings.

if your engine's smoke is white, then there is water leak. common cause is blown head gasket

check your vacumm lines for a leak the black smoke seems like it running rich

Black smoke is burning oil. Blue smoke is usually transmission fluid due to a leaking modulator valve in the older auto transmission. White smoke is due to water getting in to a cylinder from a bad gasket, cracked block or a cracked head. Black smoke from engines on starting and/or running tends to mean there is fuel leaking into the engine, or the fuel mix is incorrect and not atomised correctly. the main causes are normally a nakered air filter that isnt letting enough clean air into the engine to mix. a blocked fuel filter, which is either not letting enough fuel in, or in some cases, a faulty fuel filter which is letting too much fuel into the engine, and causing black smoke due to excess burning. Black smoke is a fuel/air mixture suggestion problems with injection or carbonation. Cause of black smoke is due to running rich in the fuel air mix. Check the oil,the oil leak,the air filter,the fuel pump and fuel filter to confirm the fault.

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black smoke is from engine oil loss through the head cylinder or piston rings

I had a similar issue to this after I got in a VERY small fender bender (literally) in an 87 Turbo Supra. In my case, my pasenger fender got pushed in JUST enough to crack a charge pipe and cause a boost leak.

Basically, what was happening was the turbo would spool and build boost, the mass fair flow sensor would read all this air coming in and tell the ECU to dial up the the appropriate amount of fuel. When the air reached the cracks in the charge pipe, it would escape out of them. Thus there was a much lower air-to-fuel ratio, causing less fuel to combust, which lead to power loss and black smoke out of the exhaust.

My guess is either an oxygen sensor, or more likely a boost leak.

Good luck mate.