Running rich and blowing black smoke

Black smoke at times is a indication of a rich running condition, This is where a mechanical condition of the enigine is necessary such as the compression test

Put 93 octane gas in it. If it's blowing black smoke then the valves are really dirty and the 93 octane will clean the intake and exhaust valves off. Make sure and run it almost out of gas so the old gas doesn't mix with the new.

Sounds like it is running rich, could be a stuck injector or a bad water temperature sensor. Is the check engine light on?

take a good look in daylight,and see if its black smoke or is it blue tint and is the engine useing oil?black smoke indicates lack of [air]check air filter.adrian

If you have excessive white smoke coming from the vehicles exhaust, it sounds like your headgasket is failing. Especially having a rough idle too. Check your coolant level, does your exhaust smoke smell sweet, like Antifreeze? If so, the gasket has blown. Hope this helps...

Hello white smoke is usually engine antifreeze,Blue smoke oil burning,Black smoke car running to rich on gas,gas is not burning properly.

Black smoke is from too much fuel, or a mis-firing of the spark plug. Pull all plugs to look to see if one is blackened. If so, this is your troubled cylinder. You can test each spark plug wire with a High energy spark plug tester. If that looks OK, then do a compresion test to see if the mechanical part of the engine seems good.

sounds like possible a sensor went bad or is loosly connected. O2 sensor??? Also check the air filter. Sounds like whatever it is, is making the truck run rich----that would be the black smoke.


Hope this helps

look for a vacume leak. black smoke means it is running very rich

Replace the ECT sensor.
And letme know. If you feel any diference. ok.